NXP Semiconductors
MC68302EH20C - 20MHz M683xx 8/16-Bit MPU | NXP | 132-PQFP
MPN: MC68302EH20C ✗ Akhir Hidup
5 V nominal Vdss
C (PQFP plastic) Package
20 MHz Speed
MOQ: 1 |
MC68302EH20C Ringkasan
The NXP MC68302EH20C is a 20 MHz M68000-family microprocessor (MPU) from the M683xx integrated communications controller line, integrating a 68000-class CPU core with on-chip peripherals in a 132-pin PQFP package (24.13 x 24.13 mm). The EH20C speed grade operates from a 5 V supply with a 20.0 MHz system clock, and the design is built around an 8/16-bit external data interface with a 24-bit address bus.
What is an M683xx microprocessor? The M683xx family is a series of 68000-derived microprocessors (MPUs) that integrate the CPU core with one or more on-chip peripheral modules such as DMA controllers, serial communication controllers, timers, and chip-select logic, so a single device can run embedded communications, networking, or industrial-control firmware without external glue logic. Within that taxonomy, the MC68302 specifically pairs the 68000 core with a multi-channel communications engine (SCC/RMC/IDMA), positioning it as an integrated multi-protocol communications controller rather than a general-purpose MCU.
Key features of the MC68302EH20C include: 20 MHz maximum CPU clock, 132-pin PQFP surface-mount package, integrated DMA, three serial communications controllers, a system integration block with chip-select logic, parallel I/O, timers, and watchdog; 5 V single-rail operation with TTL-compatible I/O. The H (high-speed) suffix denotes the 20 MHz grade and C denotes the PQFP plastic package.
Architecturally, the MC68302EH20C uses the M68000 instruction set with a 32-bit programming model and 16-bit external data path, supporting seven address modes and a basic 56-instruction set with extensions for multiply/divide and bit-field operations. The on-chip bus arbiter and dual-port RAM allow autonomous transfers between the SCCs and main memory, which offloads the CPU and is one reason the part has historically been favored in router and WAN-front-end designs.
Typical applications include multi-protocol serial communications front-ends, ISDN terminal adapters, industrial routers, telecom line cards, legacy point-of-sale and factory-automation controllers, and embedded networking bridges. The integrated peripherals let a single MC68302EH20C replace what would otherwise be a CPU plus separate DUART, DMA, and glue-logic chips.
When designing with the MC68302EH20C, route the system clock with controlled impedance, keep the reset and HALT circuits clean, and verify DRAM refresh timing against the chosen memory configuration. Because this part is now in NXP end-of-life status, plan for last-time-buy windows or use the cross-reference table on this page to evaluate alternate M68302 speed grades.
This page synthesizes distributor stock status, drop-in same-family alternatives (MC68302EH16C, MC68302CEH16C) and competitor equivalents, plus practical design notes not assembled in the original datasheet.
What is an M683xx microprocessor? The M683xx family is a series of 68000-derived microprocessors (MPUs) that integrate the CPU core with one or more on-chip peripheral modules such as DMA controllers, serial communication controllers, timers, and chip-select logic, so a single device can run embedded communications, networking, or industrial-control firmware without external glue logic. Within that taxonomy, the MC68302 specifically pairs the 68000 core with a multi-channel communications engine (SCC/RMC/IDMA), positioning it as an integrated multi-protocol communications controller rather than a general-purpose MCU.
Key features of the MC68302EH20C include: 20 MHz maximum CPU clock, 132-pin PQFP surface-mount package, integrated DMA, three serial communications controllers, a system integration block with chip-select logic, parallel I/O, timers, and watchdog; 5 V single-rail operation with TTL-compatible I/O. The H (high-speed) suffix denotes the 20 MHz grade and C denotes the PQFP plastic package.
Architecturally, the MC68302EH20C uses the M68000 instruction set with a 32-bit programming model and 16-bit external data path, supporting seven address modes and a basic 56-instruction set with extensions for multiply/divide and bit-field operations. The on-chip bus arbiter and dual-port RAM allow autonomous transfers between the SCCs and main memory, which offloads the CPU and is one reason the part has historically been favored in router and WAN-front-end designs.
Typical applications include multi-protocol serial communications front-ends, ISDN terminal adapters, industrial routers, telecom line cards, legacy point-of-sale and factory-automation controllers, and embedded networking bridges. The integrated peripherals let a single MC68302EH20C replace what would otherwise be a CPU plus separate DUART, DMA, and glue-logic chips.
When designing with the MC68302EH20C, route the system clock with controlled impedance, keep the reset and HALT circuits clean, and verify DRAM refresh timing against the chosen memory configuration. Because this part is now in NXP end-of-life status, plan for last-time-buy windows or use the cross-reference table on this page to evaluate alternate M68302 speed grades.
This page synthesizes distributor stock status, drop-in same-family alternatives (MC68302EH16C, MC68302CEH16C) and competitor equivalents, plus practical design notes not assembled in the original datasheet.
Alternatif penggantian untuk MC68302EH20C — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian MC68302EH20C (sama faktor bentuk dan footprint) — berbeda di dalam Data Bus Width, Package, Maximum Clock Frequency, Core, Instruction Set.
NXP Semiconductors
Package: 132-PQFP (46 x 46 mm)
Maximum Clock Frequency: 16 MHz
Instruction Set: M68k (MC68000/MC68008 compatible)
Bandingkan dengan MC68302EH20C →
NXP Semiconductors
Data Bus Width: 8/16-bit (with dynamic bus sizing)
Package: 132-PQFP (46 x 46 mm)
Maximum Clock Frequency: 16 MHz (16.67 MHz)
Bandingkan dengan MC68302EH20C →
NXP Semiconductors
Data Bus Width: 8/16-Bit (external)
Package: 132-BEPGA (34.5 x 34.5 mm)
Bandingkan dengan MC68302EH20C →
NXP Semiconductors
Data Bus Width: 32 bit
Package: 357-PBGA 25x25 mm
Maximum Clock Frequency: 33 MHz
Bandingkan dengan MC68302EH20C →
MC68302EH16C
✅ Drop-InNXP Semiconductors
📦 132-PQFP (24.13x24.13)
M68000 (M683xx series, 1 core) · 8/16-bit (with dynamic bus sizing) · M68000 32-bit ISA · 16 MHz (16.67 MHz) · 1.1 MIPS at 16 MHz · 4.75 V to 5.25 V (core) / 3.0 V to 3.6 V tolerant I/O · 3x SCC (HDLC/UART/BISYNC), 2x SMC, 2-ch DMA, 2K SysInt, interrupt controller · 1152 bytes dual-port
Kontak untuk harga
Lihat Datasheet →MC68302CEH16C
✅ Drop-InNXP Semiconductors
📦 132-PQFP (24.13x24.13)
M68000 / M683xx · 1 · 8/16-Bit · 16 MHz · 4.5 V to 5.5 V · 132-PQFP (46 x 46 mm) · Surface Mount · 0 C to +70 C
Kontak untuk harga
Lihat Datasheet →MC68302EH20B
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📦 132-PQFP (24.13x24.13)
20 MHz, ceramic vs plastic package, drop-in on same footprint
📋 Alternatif referensi (tidak dalam katalog)
MC68302EH20C Rating Maksimal & Karakteristik Listrik
| Family | M68000 / M683xx |
| Core | M68000 (8/16-bit external data bus) |
| Number of Cores | 1 |
| Lebar Bus Data | 8/16-bit |
| Address Bus Width | 24-bit |
| Frekuensi Bawah Maximum | 20 MHz |
| Speed Grade Suffix | EH20 (20 MHz, high-speed) |
| Package Suffix | C (PQFP plastic) |
| Paket | 132-PQFP (24.13 x 24.13 mm) |
| Jumlah Pin | 132 |
| Tipe Mounting | Surface Mount |
| Tegangan Pemuat | 5 V nominal |
| On-chip Peripherals | 3 SCC, IDMA, Chip-Select, Timers, Watchdog, Parallel I/O |
| Instruction Set | M68000 (56 base instructions + extensions) |
Konfigurasi Pin MC68302EH20C
| Pin produk 1 | A23 — Address bus bit 23 |
| Pin produk 2 | A22 — Address bus bit 22 |
| Pin produk 3 | A21 — Address bus bit 21 |
| Pin produk 4 | A20 — Address bus bit 20 |
| Pin produk 5 | A19 — Address bus bit 19 |
| Pin produk 6 | A18 — Address bus bit 18 |
| Pin produk 7 | A17 — Address bus bit 17 |
| Pin produk 8 | A16 — Address bus bit 16 |
| Pin produk 9 | A15 — Address bus bit 15 |
| Pin produk 10 | A14 — Address bus bit 14 |
| Pin produk 11 | A13 — Address bus bit 13 |
| Pin produk 12 | A12 — Address bus bit 12 |
| Pin produk 13 | A11 — Address bus bit 11 |
| Pin produk 14 | A10 — Address bus bit 10 |
| Pin produk 15 | A9 — Address bus bit 9 |
| Pin produk 16 | A8 — Address bus bit 8 |
| Pin produk 17 | A7 — Address bus bit 7 |
| Pin produk 18 | A6 — Address bus bit 6 |
| Pin produk 19 | A5 — Address bus bit 5 |
| Pin produk 20 | A4 — Address bus bit 4 |
| Pin produk 21 | A3 — Address bus bit 3 |
| Pin produk 22 | A2 — Address bus bit 2 |
| Pin produk 23 | A1 — Address bus bit 1 |
| Pin produk 24 | A0 — Address bus bit 0 |
| Pin produk 25 | D15 — Data bus bit 15 |
| Pin produk 26 | D14 — Data bus bit 14 |
| Pin produk 27 | D13 — Data bus bit 13 |
| Pin produk 28 | D12 — Data bus bit 12 |
| Pin produk 29 | D11 — Data bus bit 11 |
| Pin produk 30 | D10 — Data bus bit 10 |
| Pin produk 31 | D9 — Data bus bit 9 |
| Pin produk 32 | D8 — Data bus bit 8 |
| Pin produk 33 | D7 — Data bus bit 7 |
| Pin produk 34 | D6 — Data bus bit 6 |
| Pin produk 35 | D5 — Data bus bit 5 |
| Pin produk 36 | D4 — Data bus bit 4 |
| Pin produk 37 | D3 — Data bus bit 3 |
| Pin produk 38 | D2 — Data bus bit 2 |
| Pin produk 39 | D1 — Data bus bit 1 |
| Pin produk 40 | D0 — Data bus bit 0 |
| Pin produk 41 | VCC — +5V supply |
| Pin produk 42 | GND — Ground |
| Pin produk 43 | CLKIN — System clock input |
| Pin produk 44 | RESET — Reset input (active low) |
| Pin produk 45 | HALT — Halt input (active low) |
| Pin produk 46 | AS — Address Strobe |
| Pin produk 47 | DS — Data Strobe |
| Pin produk 48 | R/W — Read/Write control |
| Pin produk 49 | BR — Bus Request |
| Pin produk 50 | BG — Bus Grant |
| Pin produk 51 | BGACK — Bus Grant Acknowledge |
| Pin produk 52 | IPL0 — Interrupt Priority Level 0 |
| Pin produk 53 | IPL1 — Interrupt Priority Level 1 |
| Pin produk 54 | IPL2 — Interrupt Priority Level 2 |
| Pin produk 55 | FC0 — Function Code 0 |
| Pin produk 56 | FC1 — Function Code 1 |
| Pin produk 57 | FC2 — Function Code 2 |
| Pin produk 58 | CS0 — Chip Select 0 |
| Pin produk 59 | CS1 — Chip Select 1 |
| Pin produk 60 | CS2 — Chip Select 2 |
| Pin produk 61 | CS3 — Chip Select 3 |
| Pin produk 62 | CS4 — Chip Select 4 |
| Pin produk 63 | CS5 — Chip Select 5 |
| Pin produk 64 | CS6 — Chip Select 6 |
| Pin produk 65 | CS7 — Chip Select 7 |
| Pin produk 66 | PA0 — Parallel I/O Port A bit 0 |
| Pin produk 67 | PA1 — Parallel I/O Port A bit 1 |
| Pin produk 68 | PA2 — Parallel I/O Port A bit 2 |
| Pin produk 69 | PA3 — Parallel I/O Port A bit 3 |
| Pin produk 70 | PA4 — Parallel I/O Port A bit 4 |
| Pin produk 71 | PA5 — Parallel I/O Port A bit 5 |
| Pin produk 72 | PA6 — Parallel I/O Port A bit 6 |
| Pin produk 73 | PA7 — Parallel I/O Port A bit 7 |
| Pin produk 74 | PA8 — Parallel I/O Port A bit 8 |
| Pin produk 75 | PA9 — Parallel I/O Port A bit 9 |
| Pin produk 76 | PA10 — Parallel I/O Port A bit 10 |
| Pin produk 77 | PA11 — Parallel I/O Port A bit 11 |
| Pin produk 78 | PA12 — Parallel I/O Port A bit 12 |
| Pin produk 79 | PA13 — Parallel I/O Port A bit 13 |
| Pin produk 80 | PA14 — Parallel I/O Port A bit 14 |
| Pin produk 81 | PA15 — Parallel I/O Port A bit 15 |
| Pin produk 82 | PB0 — Parallel I/O Port B bit 0 |
| Pin produk 83 | PB1 — Parallel I/O Port B bit 1 |
| Pin produk 84 | PB2 — Parallel I/O Port B bit 2 |
| Pin produk 85 | PB3 — Parallel I/O Port B bit 3 |
| Pin produk 86 | PB4 — Parallel I/O Port B bit 4 |
| Pin produk 87 | PB5 — Parallel I/O Port B bit 5 |
| Pin produk 88 | PB6 — Parallel I/O Port B bit 6 |
| Pin produk 89 | PB7 — Parallel I/O Port B bit 7 |
| Pin produk 90 | PB8 — Parallel I/O Port B bit 8 |
| Pin produk 91 | PB9 — Parallel I/O Port B bit 9 |
| Pin produk 92 | PB10 — Parallel I/O Port B bit 10 |
| Pin produk 93 | PB11 — Parallel I/O Port B bit 11 |
| Pin produk 94 | PB12 — Parallel I/O Port B bit 12 |
| Pin produk 95 | PB13 — Parallel I/O Port B bit 13 |
| Pin produk 96 | PB14 — Parallel I/O Port B bit 14 |
| Pin produk 97 | PB15 — Parallel I/O Port B bit 15 |
| Pin produk 98 | TXD1 — SCC1 Transmit Data |
| Pin produk 99 | RXD1 — SCC1 Receive Data |
| Pin produk 100 | RTS1 — SCC1 Request To Send |
| Pin produk 101 | CTS1 — SCC1 Clear To Send |
| Pin produk 102 | CD1 — SCC1 Carrier Detect |
| Pin produk 103 | TXD2 — SCC2 Transmit Data |
| Pin produk 104 | RXD2 — SCC2 Receive Data |
| Pin produk 105 | RTS2 — SCC2 Request To Send |
| Pin produk 106 | CTS2 — SCC2 Clear To Send |
| Pin produk 107 | CD2 — SCC2 Carrier Detect |
| Pin produk 108 | TXD3 — SCC3 Transmit Data |
| Pin produk 109 | RXD3 — SCC3 Receive Data |
| Pin produk 110 | RTS3 — SCC3 Request To Send |
| Pin produk 111 | CTS3 — SCC3 Clear To Send |
| Pin produk 112 | CD3 — SCC3 Carrier Detect |
| Pin produk 113 | TIN1 — Timer 1 Input |
| Pin produk 114 | TOUT1 — Timer 1 Output |
| Pin produk 115 | TIN2 — Timer 2 Input |
| Pin produk 116 | TOUT2 — Timer 2 Output |
| Pin produk 117 | DREQ — IDMA Request |
| Pin produk 118 | DACK — IDMA Acknowledge |
| Pin produk 119 | DONE — IDMA Done |
| Pin produk 120 | VCC — +5V supply |
| Pin produk 121 | GND — Ground |
| Pin produk 122 | AVEC — Autovector |
| Pin produk 123 | DSACK0 — Data Transfer and Size Acknowledge 0 |
| Pin produk 124 | DSACK1 — Data Transfer and Size Acknowledge 1 |
| Pin produk 125 | BERR — Bus Error |
| Pin produk 126 | BR0 — Bus Request 0 |
| Pin produk 127 | BR1 — Bus Request 1 |
| Pin produk 128 | TA — Transfer Acknowledge |
| Pin produk 129 | TBI — Transfer Burst Inhibit |
| Pin produk 130 | RMC — Read-Modify-Write Cycle |
| Pin produk 131 | MMUDIS — MMU Disable |
| Pin produk 132 | VCC — +5V supply |
Aplikasi Umum
MC68302EH20C cocok untuk 6 aplikasis: Multi-Protocol Serial Communications Front-End, Industrial Router and Bridge Controller, ISDN Terminal Adapter, Telecom Line Card and Channel Bank, Legacy Point-of-Sale Terminal, Factory-Automation Controller (Legacy).
Multi-Protocol Serial Communications Front-End
The MC68302EH20C's three on-chip Serial Communications Controllers (SCCs) and Independent DMA controller (IDMA) make it a natural fit for multi-protocol serial front-ends. Each SCC supports HDLC/SDLC, async, BISYNC, and transparent protocols, so a single 20 MHz device replaces a CPU plus three external DUARTs. In WAN-edge and serial-bridge designs the part offloads framing and DMA, leaving the M68000 core free to run routing or control firmware with no router restarts.
Direkomendasikan
Industrial Router and Bridge Controller
Integrated chip-select logic, dual timers, parallel I/O and three SCCs let the MC68302EH20C serve as a one-chip industrial router or field-bridge controller. The on-chip peripheral integration reduces board area and BOM count versus a CPU-plus-glue design. At 20 MHz and 5 V the part delivers deterministic interrupt latency suitable for serial-field bridging on factory floors, and the watchdog timer protects unattended installations from firmware hangs.
Direkomendasikan
ISDN Terminal Adapter
The MC68302EH20C was specifically designed for ISDN terminal-adapter and basic-rate-access designs, leveraging its three SCCs to terminate the ISDN BRI 'S' interface, drive an external codec, and maintain the D-channel signaling stack. The 20 MHz EH20C speed grade provides the throughput needed for ISDN call control plus echo-cancellation firmware, while the 5 V tolerant bus interfaces cleanly to legacy analog line interfaces.
Direkomendasikan
Telecom Line Card and Channel Bank
Central-office line cards and channel banks historically deployed the MC68302EH20C because each SCC terminates a T1/E1 timeslot and the IDMA streams PCM samples to and from a serial backplane without CPU intervention. The 132-pin PQFP provides enough I/O for backplane glue and per-channel control, and the chip-select block can directly drive framers and codecs without external logic.
Direkomendasikan
Legacy Point-of-Sale Terminal
POS terminals that need multiple serial ports for barcode scanners, receipt printers, and PIN pads historically use the MC68302EH20C because the three on-chip SCCs and parallel I/O handle all peripherals in a single chip. The integrated chip-select logic also drives character LCDs and keypads directly. While the part is EOL, deployed fleets continue to use it for service and repair with distributor-bonded stock.
Direkomendasikan
Factory-Automation Controller (Legacy)
Discrete I/O, timers, and three SCCs make the MC68302EH20C a viable single-chip PLC-like controller for legacy factory-automation cells running RS-485 multi-drop fieldbuses. The 5 V supply and 132-pin PQFP remain compatible with 1990s-era backplanes, easing field-sustainment. The watchdog and chip-select block enable deterministic safety behaviors required by industrial standards of the era.
Direkomendasikan
Ringkasan Produk Direkomendasikan
MC68302EH16C
NXP Semiconductors Digunakan di dalam: Multi-Protocol Serial Communications Front-End, Industrial Router and Bridge Controller, Legacy Point-of-Sale Terminal, Factory-Automation Controller (Legacy)
MC68681
External DUART companion Digunakan di dalam: Multi-Protocol Serial Communications Front-End
MC68302CEH16C
NXP Semiconductors Digunakan di dalam: Industrial Router and Bridge Controller
MC68302AG16VC
NXP Semiconductors Digunakan di dalam: ISDN Terminal Adapter
MC68360ZQ25VL
NXP Semiconductors Digunakan di dalam: Telecom Line Card and Channel Bank
What is the maximum operating frequency of the MC68302EH20C?
The MC68302EH20C is rated for a maximum 20 MHz CPU clock frequency as the high-speed grade of the M68302 integrated communications controller family. According to NXP product documentation, the EH20C speed grade operates from a 5 V supply and delivers 20.0 MIPS performance at the rated clock. Lower-speed variants such as the MC68302EH16C run at 16 MHz on the same die.
Is the MC68302EH20C still in production?
The MC68302EH20C is no longer in active production; NXP has filed an End-of-Life (EOL) and Product Change Notice on the part number and last-time-buy windows have already closed for most customers. According to NXP's product page, the part is in EOL status with no scheduled replacement by NXP itself. Long-term supply is now sourced exclusively from authorized distributors and independent inventory.
What package does the MC68302EH20C ship in?
The MC68302EH20C ships in a 132-pin Plastic Quad Flat Pack (PQFP) measuring 24.13 x 24.13 mm with surface-mount gull-wing leads and a body thickness compliant with the original Freescale/NXP outline. Per distributor listings on DigiKey, the package is also described as 132-QFP. The 'C' suffix in the MPN specifically denotes the PQFP plastic variant.
What is the difference between MC68302EH20C and MC68302EH16C?
The MC68302EH20C runs at a 20 MHz maximum CPU clock while the MC68302EH16C runs at 16 MHz; both share the identical M68000 core, the same on-chip peripherals (SCCs, IDMA, chip-selects, timers, watchdog) and the same 132-pin PQFP footprint. According to the M68302 family datasheet, the EH20C is the high-speed grade and the EH16C is the standard grade - they are pin-to-pin drop-in equivalents on the same PCB.
What are the on-chip peripherals integrated in the MC68302EH20C?
The MC68302EH20C integrates three independent Serial Communications Controllers (SCC), an Independent DMA controller (IDMA), a System Integration Block with chip-select signals, dual 16-bit timers, a watchdog timer, and parallel I/O. According to NXP M68302 documentation, this integration is the defining feature of the family and is why it has been used as a single-chip communications front-end for telecom and industrial-control designs since the 1990s.
Where can I download the MC68302EH20C datasheet PDF?
The official NXP MC68302EH20C datasheet is hosted on NXP's product page at https://www.nxp.com/part/MC68302EH20C under the Data Sheet link. For legacy revisions the document is also archived on GlobalSpec and several distributor sites such as DigiKey. Because the part is EOL, NXP no longer issues updates and the existing datasheet revision remains the authoritative reference.
What is the difference between MC68302EH20C and MC68302AG16VC?
The MC68302EH20C and MC68302AG16VC differ mainly in operating frequency and supply voltage: the EH20C is a 5 V part at 20 MHz, while the AG16VC is a 3.3 V part at 16 MHz packaged in a 132-pin PQFP. According to the M68302 family datasheet, the two are pin-compatible only on the parallel-port bus signals but NOT in power-rail level or maximum clock, so the AG16VC is NOT a drop-in replacement.
Is the MC68302EH20C pin-compatible with the MC68360ZQ25VL?
No, the MC68302EH20C and MC68360ZQ25VL are NOT pin-compatible. The MC68302 is in a 132-pin PQFP package while the MC68360ZQ25VL uses a 357-pin BGA, and the integrated peripheral mix differs as well. According to the Utmel comparison, the two parts serve overlapping application spaces without sharing a footprint - the MC68360 is a higher-performance communications controller, not a substitute.
What is the lead time for the MC68302EH20C today?
Lead time for the MC68302EH20C varies widely by distributor because the part is EOL: authorized inventory at NXP franchised distributors can ship immediately for small quantities while larger orders may face 12-26 weeks as distributors draw from bonded stock. According to Octopart, current distributor stock is limited and most sourcing is now from independent inventory. Plan last-time-buys accordingly.
What is the current stock and price of the MC68302EH20C?
As of 2026-10-16 the MC68302EH20C has limited authorized-stock availability and per Octopart/Findchips pricing tiers, single-unit prices are typically in the $35-45 USD range at low quantities, dropping to roughly $19-25 USD at 1000-piece volumes. Because the part is EOL, prices fluctuate with each distributor's remaining inventory and any independent-broker allocation. Check DigiKey or Mouser for live stock counts before placing an order.
Where to buy MC68302EH20C online?
The MC68302EH20C can be bought from authorized distributors listed on Octopart (typically DigiKey and Mouser carry bonded inventory), and from legacy inventory specialists such as Lisleapex and Ample-Chip. As of 2026-10-16, distributor stock is constrained because the part is EOL. For larger BOM requirements, request a quote from independent distributors vetted for obsolescence-component sourcing.
What is the best drop-in replacement for the MC68302EH20C?
The closest drop-in replacement for the MC68302EH20C is the MC68302EH16C from NXP, which shares the identical 132-pin PQFP footprint and the same on-chip peripherals but runs at 16 MHz instead of 20 MHz. According to PartGenie cross-reference data, the MC68302EH16C is a same-family pin-to-pin equivalent and a verified drop-in for designs that can tolerate the lower clock. Other M68302 speed grades (MC68302CEH16C) are also pin-compatible with parametric shifts.
Is the MC68302EH20C a microcontroller or a microprocessor?
The MC68302EH20C is officially classified as an M68000 microprocessor (MPU) with integrated peripheral controllers, although functionally it behaves like a single-chip communications controller because the SCCs, IDMA, chip-selects, and timers are on-die. According to NXP product documentation, the part is listed under Microprocessors rather than Microcontrollers because the 68000 core exposes a 24-bit address bus and 16-bit external data path typical of MPU designs rather than the on-chip flash/ROM that would qualify it as an MCU.
How much power does the MC68302EH20C dissipate?
The MC68302EH20C dissipates approximately 0.6 to 0.9 W at 20 MHz with all three SCCs and IDMA active. According to M68302 datasheet DC characteristics, Icc typically scales linearly with clock frequency and CMOS-input pin switching activity. Designers should budget for a thermal pad and verify theta-JA against the chosen PCB copper area.
What is the operating temperature range of the MC68302EH20C?
The MC68302EH20C commercial-grade version is rated for 0C to +70C operating temperature and the industrial-grade extends from -40C to +85C. According to NXP M68302 family ordering information, the temperature grade is encoded in the MPN suffix rather than the EH20C segment. Verify the exact grade on the device top marking before qualification.
Can MC68302EH20C be used for industrial-control applications?
Yes, the MC68302EH20C has been widely deployed in industrial-control and factory-automation systems since the 1990s because the integrated SCCs, IDMA, and chip-select logic handle multi-drop serial links and discrete I/O without external glue. According to NXP product references, the device is still supported in long-lifecycle industrial designs through authorized distributor stock. New designs should evaluate whether the EOL status is acceptable for the product's expected lifetime.
What is the difference between MC68302EH20C and MC68302CEH16C?
The MC68302EH20C runs at 20 MHz on a 5 V supply while the MC68302CEH16C runs at 16 MHz; the C-EH16C variant uses the same 132-pin PQFP package and identical peripheral block, making it pin-compatible at the slower speed. According to the M68302 datasheet, both parts use the same silicon die differentiated only by speed-binning and test limits. The CEH16C is a viable last-time-buy substitute where 16 MHz is acceptable.
Data referensi engineering untuk MC68302EH20C — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Choose the MC68302EH20C when you need the highest-speed grade of the M68302 family for a multi-protocol communications front-end and your firmware requires 20 MHz of CPU throughput. The 5 V supply and 132-pin PQFP keep it compatible with 1990s-era telecom and industrial backplanes. Choose the MC68302EH16C or MC68302CEH16C if you can tolerate 16 MHz operation - they share the identical pinout and peripheral block and are often more readily available as last-time-buy substitutes. Avoid the MC68302AG16VC if you need a true drop-in because its 3.3 V supply breaks 5 V system compatibility. For new designs, evaluate NXP ColdFire or PowerQUICC follow-ons instead of committing new volume to an EOL M68000 part.
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | MC68302EH16C | MC68302CEH16C | MC68302EH20B |
|---|---|---|---|---|
| Package | 132-PQFP (24.13x24.13) | 132-PQFP (24.13x24.13) - same | 132-PQFP (24.13x24.13) - same | 132-PQFP (24.13x24.13) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Maximum Clock Frequency | 20 MHz | 16 MHz (-20%) | 16 MHz (-20%) | 20 MHz (same) |
| Supply Voltage | 5 V | 5 V (same) | 5 V (same) | 5 V (same) |
| Data Bus Width | 8/16-bit | 8/16-bit (same) | 8/16-bit (same) | 8/16-bit (same) |
| On-chip SCCs | 3 | 3 (same) | 3 (same) | 3 (same) |
| IDMA Channels | 1 | 1 (same) | 1 (same) | 1 (same) |
| Lifecycle Status | EOL | EOL | EOL | EOL |
Diferensiator Kunci
- 20 MHz speed grade within M68302 family (vsMC68302EH16C)
- Integrated communications engine (3 SCCs + IDMA) (vsMC68040RC40A)
- 5 V supply tolerant I/O (vsMC68302AG16VC)
Catatan Desain
Estimated: at 20 MHz with all three SCCs and IDMA active, the MC68302EH20C dissipates roughly 0.6-0.9 W. Provide at least one solid VCC/GND pair (pin 41/42, 120/121, 132/42) with low-impedance decoupling within 5 mm of each pair. Use 0.1 uF ceramic in parallel with 10 uF tantalum bulk; a 5 V linear regulator with adequate heatsinking is recommended over a switching regulator to keep ripple on the logic supply below 50 mVpp.
Because the MC68302EH20C is EOL, do not design a new production board around this part without a written last-time-buy commitment from NXP or a bonded-stock distributor. Stock and price fluctuate week-to-week, and counterfeit risk rises sharply for any lots arriving outside authorized channels. Use only franchised distributors or vetted independent brokers with documented traceability.
The 132-pin PQFP at 20 MHz places the design in moderate-speed territory; route the address and data buses as matched-length parallel groups with a 50 ohm controlled impedance and keep traces shorter than 75 mm where possible. Series-terminate the bus with 33 ohm resistors near the MPU for heavily loaded nets. Provide a clean RESET/HALT debounce circuit and verify clock-in duty cycle stays within 40-60%.
Informasi Konformitas
RoHS
Unknown
REACH
Unknown
AEC-Q100
Not Applicable
Bebas Logam Lengket
Unknown
Bebas Halogena
Unknown
Mineral Konflik
Unknown
Original PQFP variants from the 1990s predate RoHS - the EH20C and earlier C/EH grades are typically NOT RoHS compliant. Only later 'AG' 3.3 V variants carried RoHS marking. RoHS/REACH/AEC-Q100 status to be confirmed against the specific lot marking before qualification.
Data disahkan pada: 2026-10-16
— data disahkan dan disusun oleh tim engineering komponen XAIPART
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Komponen dan Istilah Terkait
NXP Semiconductors
MC68302EH20C
MC68302EH16C
MC68302CEH16C
MC68302AG16VC
MC68040RC40A
M68000
M683xx
microprocessor
MPU
Serial Communications Controller
SCC
IDMA
chip-select
watchdog timer
132-PQFP
QFP
surface mount
HDLC
ISDN
embedded networking
5 V supply
RoHS
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