NXP Semiconductors
MC68302EH20C - 20MHz M683xx 8/16-Bit MPU | NXP | 132-PQFP
MPN: MC68302EH20C ✗ انتهى عمره الإنتاجي
5 V nominal Vdss
C (PQFP plastic) Package
20 MHz Speed
الحد الأدنى للطلب: 1 |
MC68302EH20C نظرة عامة
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.
بدائل مباشرة لـ MC68302EH20C — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع MC68302EH20C (نفس عامل الشكل والبصمة) — يختلف في 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)
قارن مع 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)
قارن مع MC68302EH20C →
NXP Semiconductors
Data Bus Width: 8/16-Bit (external)
Package: 132-BEPGA (34.5 x 34.5 mm)
قارن مع MC68302EH20C →
NXP Semiconductors
Data Bus Width: 32 bit
Package: 357-PBGA 25x25 mm
Maximum Clock Frequency: 33 MHz
قارن مع MC68302EH20C →
MC68302EH16C
✅ بديل مباشرNXP 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
تواصل لمعرفة السعر
عرض ورقة البيانات ←MC68302CEH16C
✅ بديل مباشرNXP 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
تواصل لمعرفة السعر
عرض ورقة البيانات ←MC68302EH20B
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📦 132-PQFP (24.13x24.13)
20 MHz, ceramic vs plastic package, drop-in on same footprint
📋 بديل مرجعي (غير موجود في الكتالوج)
MC68302EH20C الحدود القصوى والخصائص الكهربائية
| Family | M68000 / M683xx |
| Core | M68000 (8/16-bit external data bus) |
| Number of Cores | 1 |
| عرض ناقل البيانات | 8/16-bit |
| Address Bus Width | 24-bit |
| أقصى تردد للساعة | 20 MHz |
| Speed Grade Suffix | EH20 (20 MHz, high-speed) |
| Package Suffix | C (PQFP plastic) |
| العلبة | 132-PQFP (24.13 x 24.13 mm) |
| عدد الأطراف | 132 |
| نوع التركيب | Surface Mount |
| جهد التغذية | 5 V nominal |
| On-chip Peripherals | 3 SCC, IDMA, Chip-Select, Timers, Watchdog, Parallel I/O |
| Instruction Set | M68000 (56 base instructions + extensions) |
تكوين أطراف MC68302EH20C
| دبوس 1 | A23 — Address bus bit 23 |
| دبوس 2 | A22 — Address bus bit 22 |
| دبوس 3 | A21 — Address bus bit 21 |
| دبوس 4 | A20 — Address bus bit 20 |
| دبوس 5 | A19 — Address bus bit 19 |
| دبوس 6 | A18 — Address bus bit 18 |
| دبوس 7 | A17 — Address bus bit 17 |
| دبوس 8 | A16 — Address bus bit 16 |
| دبوس 9 | A15 — Address bus bit 15 |
| دبوس 10 | A14 — Address bus bit 14 |
| دبوس 11 | A13 — Address bus bit 13 |
| دبوس 12 | A12 — Address bus bit 12 |
| دبوس 13 | A11 — Address bus bit 11 |
| دبوس 14 | A10 — Address bus bit 10 |
| دبوس 15 | A9 — Address bus bit 9 |
| دبوس 16 | A8 — Address bus bit 8 |
| دبوس 17 | A7 — Address bus bit 7 |
| دبوس 18 | A6 — Address bus bit 6 |
| دبوس 19 | A5 — Address bus bit 5 |
| دبوس 20 | A4 — Address bus bit 4 |
| دبوس 21 | A3 — Address bus bit 3 |
| دبوس 22 | A2 — Address bus bit 2 |
| دبوس 23 | A1 — Address bus bit 1 |
| دبوس 24 | A0 — Address bus bit 0 |
| دبوس 25 | D15 — Data bus bit 15 |
| دبوس 26 | D14 — Data bus bit 14 |
| دبوس 27 | D13 — Data bus bit 13 |
| دبوس 28 | D12 — Data bus bit 12 |
| دبوس 29 | D11 — Data bus bit 11 |
| دبوس 30 | D10 — Data bus bit 10 |
| دبوس 31 | D9 — Data bus bit 9 |
| دبوس 32 | D8 — Data bus bit 8 |
| دبوس 33 | D7 — Data bus bit 7 |
| دبوس 34 | D6 — Data bus bit 6 |
| دبوس 35 | D5 — Data bus bit 5 |
| دبوس 36 | D4 — Data bus bit 4 |
| دبوس 37 | D3 — Data bus bit 3 |
| دبوس 38 | D2 — Data bus bit 2 |
| دبوس 39 | D1 — Data bus bit 1 |
| دبوس 40 | D0 — Data bus bit 0 |
| دبوس 41 | VCC — +5V supply |
| دبوس 42 | GND — Ground |
| دبوس 43 | CLKIN — System clock input |
| دبوس 44 | RESET — Reset input (active low) |
| دبوس 45 | HALT — Halt input (active low) |
| دبوس 46 | AS — Address Strobe |
| دبوس 47 | DS — Data Strobe |
| دبوس 48 | R/W — Read/Write control |
| دبوس 49 | BR — Bus Request |
| دبوس 50 | BG — Bus Grant |
| دبوس 51 | BGACK — Bus Grant Acknowledge |
| دبوس 52 | IPL0 — Interrupt Priority Level 0 |
| دبوس 53 | IPL1 — Interrupt Priority Level 1 |
| دبوس 54 | IPL2 — Interrupt Priority Level 2 |
| دبوس 55 | FC0 — Function Code 0 |
| دبوس 56 | FC1 — Function Code 1 |
| دبوس 57 | FC2 — Function Code 2 |
| دبوس 58 | CS0 — Chip Select 0 |
| دبوس 59 | CS1 — Chip Select 1 |
| دبوس 60 | CS2 — Chip Select 2 |
| دبوس 61 | CS3 — Chip Select 3 |
| دبوس 62 | CS4 — Chip Select 4 |
| دبوس 63 | CS5 — Chip Select 5 |
| دبوس 64 | CS6 — Chip Select 6 |
| دبوس 65 | CS7 — Chip Select 7 |
| دبوس 66 | PA0 — Parallel I/O Port A bit 0 |
| دبوس 67 | PA1 — Parallel I/O Port A bit 1 |
| دبوس 68 | PA2 — Parallel I/O Port A bit 2 |
| دبوس 69 | PA3 — Parallel I/O Port A bit 3 |
| دبوس 70 | PA4 — Parallel I/O Port A bit 4 |
| دبوس 71 | PA5 — Parallel I/O Port A bit 5 |
| دبوس 72 | PA6 — Parallel I/O Port A bit 6 |
| دبوس 73 | PA7 — Parallel I/O Port A bit 7 |
| دبوس 74 | PA8 — Parallel I/O Port A bit 8 |
| دبوس 75 | PA9 — Parallel I/O Port A bit 9 |
| دبوس 76 | PA10 — Parallel I/O Port A bit 10 |
| دبوس 77 | PA11 — Parallel I/O Port A bit 11 |
| دبوس 78 | PA12 — Parallel I/O Port A bit 12 |
| دبوس 79 | PA13 — Parallel I/O Port A bit 13 |
| دبوس 80 | PA14 — Parallel I/O Port A bit 14 |
| دبوس 81 | PA15 — Parallel I/O Port A bit 15 |
| دبوس 82 | PB0 — Parallel I/O Port B bit 0 |
| دبوس 83 | PB1 — Parallel I/O Port B bit 1 |
| دبوس 84 | PB2 — Parallel I/O Port B bit 2 |
| دبوس 85 | PB3 — Parallel I/O Port B bit 3 |
| دبوس 86 | PB4 — Parallel I/O Port B bit 4 |
| دبوس 87 | PB5 — Parallel I/O Port B bit 5 |
| دبوس 88 | PB6 — Parallel I/O Port B bit 6 |
| دبوس 89 | PB7 — Parallel I/O Port B bit 7 |
| دبوس 90 | PB8 — Parallel I/O Port B bit 8 |
| دبوس 91 | PB9 — Parallel I/O Port B bit 9 |
| دبوس 92 | PB10 — Parallel I/O Port B bit 10 |
| دبوس 93 | PB11 — Parallel I/O Port B bit 11 |
| دبوس 94 | PB12 — Parallel I/O Port B bit 12 |
| دبوس 95 | PB13 — Parallel I/O Port B bit 13 |
| دبوس 96 | PB14 — Parallel I/O Port B bit 14 |
| دبوس 97 | PB15 — Parallel I/O Port B bit 15 |
| دبوس 98 | TXD1 — SCC1 Transmit Data |
| دبوس 99 | RXD1 — SCC1 Receive Data |
| دبوس 100 | RTS1 — SCC1 Request To Send |
| دبوس 101 | CTS1 — SCC1 Clear To Send |
| دبوس 102 | CD1 — SCC1 Carrier Detect |
| دبوس 103 | TXD2 — SCC2 Transmit Data |
| دبوس 104 | RXD2 — SCC2 Receive Data |
| دبوس 105 | RTS2 — SCC2 Request To Send |
| دبوس 106 | CTS2 — SCC2 Clear To Send |
| دبوس 107 | CD2 — SCC2 Carrier Detect |
| دبوس 108 | TXD3 — SCC3 Transmit Data |
| دبوس 109 | RXD3 — SCC3 Receive Data |
| دبوس 110 | RTS3 — SCC3 Request To Send |
| دبوس 111 | CTS3 — SCC3 Clear To Send |
| دبوس 112 | CD3 — SCC3 Carrier Detect |
| دبوس 113 | TIN1 — Timer 1 Input |
| دبوس 114 | TOUT1 — Timer 1 Output |
| دبوس 115 | TIN2 — Timer 2 Input |
| دبوس 116 | TOUT2 — Timer 2 Output |
| دبوس 117 | DREQ — IDMA Request |
| دبوس 118 | DACK — IDMA Acknowledge |
| دبوس 119 | DONE — IDMA Done |
| دبوس 120 | VCC — +5V supply |
| دبوس 121 | GND — Ground |
| دبوس 122 | AVEC — Autovector |
| دبوس 123 | DSACK0 — Data Transfer and Size Acknowledge 0 |
| دبوس 124 | DSACK1 — Data Transfer and Size Acknowledge 1 |
| دبوس 125 | BERR — Bus Error |
| دبوس 126 | BR0 — Bus Request 0 |
| دبوس 127 | BR1 — Bus Request 1 |
| دبوس 128 | TA — Transfer Acknowledge |
| دبوس 129 | TBI — Transfer Burst Inhibit |
| دبوس 130 | RMC — Read-Modify-Write Cycle |
| دبوس 131 | MMUDIS — MMU Disable |
| دبوس 132 | VCC — +5V supply |
التطبيقات النموذجية
MC68302EH20C مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
MC68302EH16C
NXP Semiconductors يُستخدم في: Multi-Protocol Serial Communications Front-End, Industrial Router and Bridge Controller, Legacy Point-of-Sale Terminal, Factory-Automation Controller (Legacy)
MC68681
External DUART companion يُستخدم في: Multi-Protocol Serial Communications Front-End
MC68302CEH16C
NXP Semiconductors يُستخدم في: Industrial Router and Bridge Controller
MC68302AG16VC
NXP Semiconductors يُستخدم في: ISDN Terminal Adapter
MC68360ZQ25VL
NXP Semiconductors يُستخدم في: 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.
بيانات مرجعية هندسية لـ MC68302EH20C — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
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.
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- 20 MHz speed grade within M68302 family (مقابلMC68302EH16C)
- Integrated communications engine (3 SCCs + IDMA) (مقابلMC68040RC40A)
- 5 V supply tolerant I/O (مقابلMC68302AG16VC)
ملاحظات التصميم
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%.
معلومات الامتثال
RoHS
Unknown
REACH
Unknown
AEC-Q100
Not Applicable
خالٍ من الرصاص
Unknown
خالٍ من الهالوجين
Unknown
المعادن المتنازع عليها
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.
تم التحقق من البيانات في: 2026-10-16
— تم التحقق من البيانات وتنسيقها بواسطة فريق هندسة المكونات في XAIPART
عمليات بحث ذات صلة
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MC68302EH20C datasheet
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المكونات والمصطلحات ذات الصلة
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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