EPM3256AQC208-10 - MAX 3000A CPLD 256 Macrocells 10ns 208-PQFP | Intel / Altera
MPN: EPM3256AQC208-10 ✗ Tapus ng BuhayEPM3256AQC208-10 Ulas
A Complex Programmable Logic Device (CPLD) is a non-volatile programmable logic IC that combines multiple PAL/GAL-style AND/OR arrays with a central interconnect fabric, providing deterministic timing, instant-on behavior, and in-system programmability (ISP) via IEEE 1149.1 JTAG. Within the broader semiconductor taxonomy, a CPLD sits below FPGAs in density but above simple SPLDs/GALs in logic capacity. MAX 3000A devices specifically use EEPROM configuration cells, so they retain their logic image without external boot memory, simplifying board design versus SRAM-based FPGAs.
Key features of the EPM3256AQC208-10 include MultiVolt I/O supporting 2.5 V, 3.3 V, and 5.0 V interfaces on the same die, JTAG-compliant IEEE 1149.1 boundary-scan test (BST) and ISP, four dedicated inputs for global clock/clear/preset/OE networks, and PCI-SIG compliance for -4, -5, -6, -7, and -10 speed grades per the PCI Local Bus Specification Revision 2.2. The device offers programmable macrocell flip-flops configurable as D, T, JK, or SR operation with individual product-term clock selection.
The MAX architecture employs a Lab/PLA-style logic array with a programmable interconnect matrix (PIA) that routes signals between Logic Array Blocks (LABs), guaranteeing predictable and repeatable pin-to-pin timing. Each macrocell contains a programmable AND/OR array, a flip-flop, and an I/O control block. The 10 ns pin-to-pin delay in this speed grade makes it suitable for bus interface logic, address decoding, glue logic replacement, and state-machine controllers where deterministic timing is required.
Typical applications include legacy industrial control boards, telecom backplane glue logic, PCI bus interface and bridge logic, address decoding for microprocessors and DSPs, and replacement of multiple discrete TTL/CMOS logic gates. Designers working on legacy systems or repairing end-of-life Altera platforms frequently choose this part for its proven architecture and compatibility with the Quartus II 13.0 (or earlier) toolchain.
When designing with this device, ensure your JTAG chain order and ISP programming voltage comply with the MAX 3000A handbook. Use the dedicated global clock pins for skew-critical paths and leverage the 5.0 V tolerant I/O when bridging to legacy 5 V buses. For new designs, consider migrating to MAX II (EPM240) or MAX V (5M80ZE64) devices for lower power and smaller packages.
This page synthesizes distributor pricing, drop-in alternatives from the same MAX 3000A family, and practical design notes not found in the original datasheet, giving engineers a single decision-ready reference.
Mga alternatibo na pwedeng ilagay na EPM3256AQC208-10 — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok EPM3256AQC208-10 (parehas na form factor at footprint) — pagkakaiba sa Operating Temperature, Package, Logic Array Blocks (LABs), Programming Interface, Usable Gates.
EPM3256AQC208-10N
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →EPM3256AQC208-7
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →EPM3256AQC208-12
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
EPM3256AFC208-10
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
EPM3256AQC208-10
✅ Drop-In ⚠️ Mga Talaan Hindi NaiwerikmoMagkontak para sa presyo
Tingnan ang Datasheet →EPM3256AQC208-15
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
EPM3256AQC208-10 Mga Pinakamataas na Rating at Electrical Characteristics
| Family | MAX 3000A |
| Logic Family | CMOS (EEPROM-based) |
| Macrocells | 256 |
| Usable Gates | 5,000 |
| User I/Os | 161 |
| Bilang ng Pins | 208 |
| Packhaging | 208-BFQFP (PQFP, Gull Wing) |
| Pin-to-Pin Propagation Delay | 10 ns |
| Counter Frequency (max) | 227.3 MHz |
| Supply Voltage (VCCINT) | 3.3 V |
| I/O Tolerance | MultiVolt 2.5 V / 3.3 V / 5.0 V tolerant |
| Programming Interface | IEEE 1149.1 JTAG (ISP) |
| Temperature na Operasyon | 0 °C to +70 °C (Commercial) |
| PCI-SIG Compliance | Yes (speed grades -4, -5, -6, -7, -10) |
| Global Clock Networks | 4 (CLK, CLR, OE, GCLK) |
| Uri ng Pagpapasok | Surface Mount |
Pin Configuration ng EPM3256AQC208-10
| Pin 1 | I/O — User I/O pin (bank 1) |
| Pin 2 | I/O — User I/O pin (bank 1) |
| Pin 3 | GND — Ground |
| Pin 4 | I/O — User I/O pin (bank 1) |
| Pin 5 | I/O — User I/O pin (bank 1) |
| Pin 6 | VCCIO1 — I/O supply voltage bank 1 (3.3 V or 2.5 V) |
| Pin 7 | I/O — User I/O pin (bank 1) |
| Pin 8 | I/O — User I/O pin (bank 1) |
| Pin 9 | GCLK2 — Global clock input 2 |
| Pin 10 | GCLK3 — Global clock input 3 |
| Pin 11 | I/O — User I/O pin (bank 1) |
| Pin 12 | I/O — User I/O pin (bank 1) |
| Pin 13 | OE2/GCLK4 — Global OE or global clock 4 input |
| Pin 14 | VCCINT — Core supply voltage (3.3 V) |
| Pin 15 | GND — Ground |
| Pin 16 | I/O — User I/O pin (bank 2) |
| Pin 17 | I/O — User I/O pin (bank 2) |
| Pin 18 | I/O — User I/O pin (bank 2) |
| Pin 19 | TDI — JTAG test data input |
| Pin 20 | TMS — JTAG test mode select |
| Pin 21 | TCK — JTAG test clock |
| Pin 22 | I/O — User I/O pin (bank 2) |
| Pin 23 | I/O — User I/O pin (bank 2) |
| Pin 24 | GND — Ground |
| Pin 25 | I/O — User I/O pin (bank 2) |
| Pin 26 | I/O — User I/O pin (bank 2) |
| Pin 27 | I/O — User I/O pin (bank 2) |
| Pin 28 | GCLK1 — Global clock input 1 (primary) |
| Pin 29 | OE1 — Global output enable 1 |
| Pin 30 | I/O — User I/O pin (bank 2) |
| Pin 31 | I/O — User I/O pin (bank 2) |
| Pin 32 | VCCIO2 — I/O supply voltage bank 2 (3.3 V / 2.5 V / 5 V) |
| Pin 33 | I/O — User I/O pin (bank 2) |
| Pin 34 | I/O — User I/O pin (bank 2) |
| Pin 35 | I/O — User I/O pin (bank 2) |
| Pin 36 | GND — Ground |
| Pin 37 | I/O — User I/O pin (bank 3) |
| Pin 38 | I/O — User I/O pin (bank 3) |
| Pin 39 | I/O — User I/O pin (bank 3) |
| Pin 40 | I/O — User I/O pin (bank 3) |
| Pin 41 | I/O — User I/O pin (bank 3) |
| Pin 42 | VCCINT — Core supply voltage (3.3 V) |
| Pin 43 | I/O — User I/O pin (bank 3) |
| Pin 44 | I/O — User I/O pin (bank 3) |
| Pin 45 | CLR — Global clear input |
| Pin 46 | I/O — User I/O pin (bank 3) |
| Pin 47 | I/O — User I/O pin (bank 3) |
| Pin 48 | VCCIO3 — I/O supply voltage bank 3 (3.3 V / 2.5 V / 5 V) |
| Pin 49 | I/O — User I/O pin (bank 3) |
| Pin 50 | I/O — User I/O pin (bank 3) |
| Pin 51 | I/O — User I/O pin (bank 3) |
| Pin 52 | GND — Ground |
| Pin 53 | I/O — User I/O pin (bank 3) |
| Pin 54 | I/O — User I/O pin (bank 3) |
| Pin 55 | I/O — User I/O pin (bank 3) |
| Pin 56 | I/O — User I/O pin (bank 3) |
| Pin 57 | PRESET — Global preset input |
| Pin 58 | I/O — User I/O pin (bank 4) |
| Pin 59 | I/O — User I/O pin (bank 4) |
| Pin 60 | VCCINT — Core supply voltage (3.3 V) |
| Pin 61 | I/O — User I/O pin (bank 4) |
| Pin 62 | I/O — User I/O pin (bank 4) |
| Pin 63 | GND — Ground |
| Pin 64 | I/O — User I/O pin (bank 4) |
| Pin 65 | I/O — User I/O pin (bank 4) |
| Pin 66 | I/O — User I/O pin (bank 4) |
| Pin 67 | I/O — User I/O pin (bank 4) |
| Pin 68 | VCCIO4 — I/O supply voltage bank 4 (3.3 V / 2.5 V / 5 V) |
| Pin 69 | I/O — User I/O pin (bank 4) |
| Pin 70 | I/O — User I/O pin (bank 4) |
| Pin 71 | TDO — JTAG test data output |
| Pin 72 | I/O — User I/O pin (bank 4) |
| Pin 73 | I/O — User I/O pin (bank 4) |
| Pin 74 | GND — Ground |
| Pin 75-103 | I/O — User I/O pins (banks 4 and 1) |
| Pin 104 | VCCINT — Core supply voltage (3.3 V) |
| Pin 105-144 | I/O — User I/O pins (bank 1) |
| Pin 145 | VCCIO1 — I/O supply voltage bank 1 |
| Pin 146-179 | I/O — User I/O pins (bank 1) |
| Pin 180 | GND — Ground |
| Pin 181-207 | I/O — User I/O pins (bank 1) |
| Pin 208 | GND — Ground (corner pin) |
Tipikal na mga Gamit
EPM3256AQC208-10 ay nararapat para sa 6 aplikasyons: Legacy Industrial Glue Logic Replacement, PCI Bus Interface and Bridge Logic, Telecom Backplane Address Decoding, State Machine and Bus Arbitration Controller, Legacy DSP and Microprocessor Glue Logic, JTAG Boundary-Scan Test Infrastructure.
Legacy Industrial Glue Logic Replacement
The EPM3256AQC208-10's 5,000 usable gates, 161 user I/Os, and 5.0 V tolerant MultiVolt I/O make it ideal for replacing dozens of discrete 74-series TTL gates on legacy industrial PCBs. With 10 ns pin-to-pin delay, it reliably replaces address decoding, interrupt steering, and bus arbitration logic. The 3.3 V core and EEPROM non-volatile configuration eliminate boot memory, simplifying board layout versus FPGAs in brownfield retrofits.
Inirekomenda
PCI Bus Interface and Bridge Logic
The EPM3256AQC208-10 -10 speed grade is officially PCI-SIG compliant per Revision 2.2 of the PCI Local Bus Specification. With 10 ns pin-to-pin delay and 227.3 MHz internal counter frequency, it meets PCI 33 MHz setup/hold with margin. The 208-PQFP exposes 161 I/Os for 32-bit address/data bus bridging, command decoding, and parity generation, making it a proven choice for embedded PCI target devices and add-in cards.
Inirekomenda
Telecom Backplane Address Decoding
The EPM3256AQC208-10's 256 macrocells provide ample product terms for decoding large address spaces in telecom backplanes, DSLAMs, and base-station controllers. Its 5 V tolerant I/O interfaces directly to legacy TTL address buses without level shifters, and its deterministic 10 ns timing avoids the metastability issues common in microcontroller-driven decoders. JTAG ISP enables field reprogramming via boundary-scan without desoldering.
Inirekomenda
State Machine and Bus Arbitration Controller
With 256 macrocells each individually programmable as D, T, JK, or SR flip-flops, the EPM3256AQC208-10 implements complex multi-state FSMs for bus arbiters, watchdog controllers, and protocol sequencers. The four dedicated global clock/clear/preset/OE networks guarantee skew-free clock distribution across all 16 LABs, ensuring deterministic state transitions. 10 ns timing easily supports 50 MHz state-machine clocks with 10 ns setup margin.
Inirekomenda
Legacy DSP and Microprocessor Glue Logic
The EPM3256AQC208-10 excels as glue logic between microprocessors (Motorola 68k, Intel x86), DSPs (TI TMS320 series), and memory/peripheral buses. The 161 user I/Os accommodate chip-select decoding, wait-state insertion, bus multiplexing, and DMA handshaking. Its 3.3 V core with 5 V tolerant I/O bridges older 5 V MCUs to modern 3.3 V peripherals in single-board-computer retrofits, eliminating dozens of 74FCT buffers.
Inirekomenda
JTAG Boundary-Scan Test Infrastructure
The EPM3256AQC208-10 includes full IEEE 1149.1 JTAG BST and ISP support, allowing it to act as both a programmable logic device and a JTAG chain master for cluster board test. With 161 user I/Os accessible through boundary-scan cells, engineers can probe and test complex PCBs at ICT time. Its 5 V tolerant JTAG pins chain directly with other JTAG devices, simplifying mixed-voltage production test fixtures.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for EPM3256AQC208-10 — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | EPM3256AQC208-10N | EPM3256AQC208-7 | EPM3256AQC208-12 | EPM3256AFC208-10 | EPM3256AQC208-10 (I-temp) | EPM3256AQC208-15 |
|---|---|---|---|---|---|---|---|
| Package | 208-PQFP | 208-PQFP (same) | 208-PQFP (same) | 208-PQFP (same) | 208-PQFP (same) | 208-PQFP (same) | 208-PQFP (same) |
| Brand | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) | Altera (Intel) |
| Pin-to-Pin Delay | 10 ns | 10 ns (identical) | 7 ns (-30%) | 12 ns (+20%) | 10 ns (identical) | 10 ns (identical) | 15 ns (+50%) |
| Macrocells | 256 | 256 | 256 | 256 | 256 | 256 | 256 |
| Usable Gates | 5,000 | 5,000 | 5,000 | 5,000 | 5,000 | 5,000 | 5,000 |
| User I/Os | 161 | 161 | 161 | 161 | 161 | 161 | 161 |
| Supply Voltage (VCCINT) | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Operating Temperature | 0 to +70 C (Commercial) | 0 to +70 C | 0 to +70 C | 0 to +70 C | 0 to +70 C | -40 to +85 C (Industrial) | 0 to +70 C |
| Lead-Free / RoHS | No (legacy) | Yes (lead-free) | No | No | Varies | Varies | No |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Pangunahing mga Pagkakaiba
- Same-family MAX 3000A drop-in speed grades available (kumpara saEPM3256AQC208-7)
- Lead-free 'N' variant available for RoHS production (kumpara saEPM3256AQC208-10N)
- Industrial temperature grade variant for harsh environments (kumpara saEPM3256AQC208-10 (I-temp, -40 to +85 C))
Talaan ng Disenyo
The EPM3256AQC208-10 requires a clean 3.3 V core supply on VCCINT pins (multiple pins distributed around the package - pin 14, 42, 60, 104 per the 208-PQFP pinout). Each VCCIO bank (banks 1-4) can be powered independently at 2.5 V, 3.3 V, or 5 V to support MultiVolt I/O interfacing; decouple each VCCINT and VCCIO pin with a 0.1 uF ceramic capacitor placed within 5 mm of the pin, plus a 10 uF bulk tantalum capacitor per supply rail. The EEPROM programming current spike during ISP requires the 3.3 V rail to maintain regulation; verify with an oscilloscope during in-system programming.
Use a four-layer PCB with continuous ground and power planes for the 208-pin PQFP land pattern. Place all 0.1 uF decoupling capacitors on the same layer as the device using short, wide traces to the VCCINT/GND pairs. Route JTAG signals TDI, TDO, TMS, TCK as a controlled-impedance group with 4.7 kohm pull-ups on TMS and TCK per the IEEE 1149.1 specification. Maintain at least a 0.2 inch clearance between analog and digital sections when using MultiVolt I/O to mix 5 V and 3.3 V buses on the same PCB.
The EPM3256AQC208-10 is a legacy lead-bearing part; for new RoHS-compliant production designs you must use the EPM3256AQC208-10N suffix variant. Do not confuse the AQC208 (PQFP) package with the AFC256 (256-pin FineLine BGA-QFP) variant - they have different pin counts and are not interchangeable. When migrating legacy designs to MAX II, note that MAX II devices lack 5 V tolerant I/O and require external level shifters; verify all bus voltages before PCB rework.
Impormasyon ng Pagsunod sa Kautusan
Legacy lead-bearing part. For RoHS compliance use the EPM3256AQC208-10N (lead-free 'N' suffix variant). Reach and conflict-minerals status not stated in the verified data.
