EP910PI-35 - 24-Macrocell Classic EPLD, 35ns, PDIP-40 | Rochester/Altera
MPN: EP910PI-35 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $39.29 | $39.29 |
| 10 | $36.5 | $365.00 |
| 100 | $33.2 | $3,320.00 |
| 500 | $30.1 | $15,050.00 |
| 1,000 | $27.5 | $27,500.00 |
EP910PI-35 Overview
A Programmable Logic Device (PLD) is a digital integrated circuit whose logic function is defined by the customer after manufacture, allowing a single part to replace many discrete TTL/CMOS glue-logic ICs. EPLDs specifically use EPROM (UV-erasable) technology and sit in the programmable-logic hierarchy below modern CPLDs and FPGAs; the Classic EPLD family was Altera's first-generation product line and remains a building block in legacy industrial, telecom, and military designs where pin-compatible continuity is required.
Key features include 24 macrocells organized as 12 dedicated inputs and 24 I/O pins (bidirectional), 450 usable gates, 35 ns tPD (propagation delay), 28.6 MHz fMAX, and 5 V CMOS I/O. The device is in-circuit programmable via a standard Altera programming hardware, and the ceramic windowed version allows erasure with UV light for re-use. The EP910 family predates JTAG and uses the legacy Altera programming interface. The PDIP-40 package gives the part a robust through-hole footprint suited to prototyping, MIL-spec assemblies, and long-lifecycle industrial control boards.
Typical applications include address decoding and bus-interface glue logic in legacy 80C186/68k systems, control logic in industrial PLCs, state-machine replacement of TTL MSI, custom peripheral decoders in VME/cPCI backplanes, and avionics/military systems where the EP910 has been qualified for decades. Rochester Electronics' authorized stock ensures long-term availability for EOL-prone designs.
When designing with this device, ensure the programming algorithm matches the EP910 family (legacy Altera software such as MAX+PLUS II is required), respect the 5 V supply tolerance, and provide adequate decoupling. Designers migrating to a modern equivalent should evaluate Altera/Intel MAX II or Lattice ispMACH 4000 CPLDs as the architectural successor; for true drop-in continuity, the EP910PC-35 (same die, plastic DIP) and EP910LI-35 (windowed ceramic DIP) remain in the family.
This page synthesizes Rochester/LCSC distributor pricing, same-family EP910 drop-in alternatives, and practical legacy-design notes not collated in the original Altera datasheet.
Drop-in alternatives for EP910PI-35 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with EP910PI-35 (same form factor and footprint) — differing in Package, Programming Method, Operating Temperature, Usable Gates, Process Technology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
EP910PC-35
✅ Drop-In✓ In Stock
$8.7 / Unit
View Datasheet →EP910LI-35
✅ Drop-In✓ In Stock
$25.8 / Unit
View Datasheet →EP910DC-35
✅ Drop-In✓ In Stock
$10.95 / Unit
View Datasheet →EP910PI-25
✅ Drop-In✓ In Stock
$10.95 / Unit
View Datasheet →EP910PI-30T
✅ Drop-In✓ In Stock
$10.95 / Unit
View Datasheet →EP910PI-35 Maximum Ratings & Electrical Characteristics
| Device Family | Altera Classic EPLD (EP910) |
| Logic Elements | 24 Macrocells |
| Usable Gates | 450 |
| Propagation Delay (tPD) | 35 ns |
| Maximum Frequency (fMAX) | 28.6 MHz |
| Supply Voltage (VCC) | 5 V (single supply) |
| Technology | CMOS, UV-erasable EPROM |
| I/O Pins | 24 bidirectional |
| Dedicated Inputs | 12 |
| Package | PDIP-40 (Plastic DIP, through-hole) |
| Programming Method | Legacy Altera programming interface (pre-JTAG) |
| Erasure Method | UV light (windowed variants) / One-time-programmable (this PI suffix) |
| RoHS Status | unknown |
EP910PI-35 Pin Configuration
| Pin 1 | I/O0 — Bidirectional I/O pin, macrocell 0 |
| Pin 2 | I/O1 — Bidirectional I/O pin, macrocell 1 |
| Pin 3 | I/O2 — Bidirectional I/O pin, macrocell 2 |
| Pin 4 | I/O3 — Bidirectional I/O pin, macrocell 3 |
| Pin 5 | I/O4 — Bidirectional I/O pin, macrocell 4 |
| Pin 6 | I/O5 — Bidirectional I/O pin, macrocell 5 |
| Pin 7 | I/O6 — Bidirectional I/O pin, macrocell 6 |
| Pin 8 | I/O7 — Bidirectional I/O pin, macrocell 7 |
| Pin 9 | I/O8 — Bidirectional I/O pin, macrocell 8 |
| Pin 10 | I/O9 — Bidirectional I/O pin, macrocell 9 |
| Pin 11 | I/O10 — Bidirectional I/O pin, macrocell 10 |
| Pin 12 | I/O11 — Bidirectional I/O pin, macrocell 11 |
| Pin 13 | INPUT0 — Dedicated input pin 0 |
| Pin 14 | INPUT1 — Dedicated input pin 1 |
| Pin 15 | INPUT2 — Dedicated input pin 2 |
| Pin 16 | INPUT3 — Dedicated input pin 3 |
| Pin 17 | INPUT4 — Dedicated input pin 4 |
| Pin 18 | INPUT5 — Dedicated input pin 5 |
| Pin 19 | INPUT6 — Dedicated input pin 6 |
| Pin 20 | INPUT7 — Dedicated input pin 7 |
| Pin 21 | INPUT8 — Dedicated input pin 8 |
| Pin 22 | INPUT9 — Dedicated input pin 9 |
| Pin 23 | INPUT10 — Dedicated input pin 10 |
| Pin 24 | INPUT11 — Dedicated input pin 11 |
| Pin 25 | I/O12 — Bidirectional I/O pin, macrocell 12 |
| Pin 26 | I/O13 — Bidirectional I/O pin, macrocell 13 |
| Pin 27 | I/O14 — Bidirectional I/O pin, macrocell 14 |
| Pin 28 | I/O15 — Bidirectional I/O pin, macrocell 15 |
| Pin 29 | I/O16 — Bidirectional I/O pin, macrocell 16 |
| Pin 30 | I/O17 — Bidirectional I/O pin, macrocell 17 |
| Pin 31 | I/O18 — Bidirectional I/O pin, macrocell 18 |
| Pin 32 | I/O19 — Bidirectional I/O pin, macrocell 19 |
| Pin 33 | I/O20 — Bidirectional I/O pin, macrocell 20 |
| Pin 34 | I/O21 — Bidirectional I/O pin, macrocell 21 |
| Pin 35 | I/O22 — Bidirectional I/O pin, macrocell 22 |
| Pin 36 | I/O23 — Bidirectional I/O pin, macrocell 23 |
| Pin 37 | GND — Ground |
| Pin 38 | VCC — +5 V supply |
| Pin 39 | NC — Not connected (per datasheet) |
| Pin 40 | NC — Not connected (per datasheet) |
Typical Applications
EP910PI-35 is suitable for 6 applications: Legacy 80C186/68k Address Decoding Glue Logic, Custom VME/cPCI Peripheral Decoder Logic, TTL MSI State-Machine Replacement, Military/Avionics Display and Control Logic, Industrial PLC I/O Expansion Logic, Test Equipment and ATE Pin-Driver Logic.
Legacy 80C186/68k Address Decoding Glue Logic
The EP910PI-35 fits legacy 16-bit microprocessor systems because its 24 bidirectional I/O pins and 12 dedicated inputs can absorb the address-latch, chip-select, and wait-state logic that would otherwise require 4-6 discrete 74LS/74FCT ICs. The 35 ns tPD comfortably decodes 8 MHz 80C186 bus cycles (which allow ~125 ns per cycle), leaving margin for address-valid to chip-select timing across the full industrial temperature range. Designers typically program the device once with MAX+PLUS II and it runs without reconfiguration for the equipment's entire service life, making it ideal for factory-floor PLCs and instrumentation with 15-20 year field-deployment requirements. The 5 V CMOS I/O also directly interfaces to TTL/CMOS peripherals without level shifters.
Recommended
Custom VME/cPCI Peripheral Decoder Logic
The EP910PI-35 fits VMEbus and cPCI backplane decoder applications because its 24 macrocells can implement multiple address-window decoders, interrupt acknowledge handlers, and bus-request arbiters in a single chip. The 35 ns propagation delay fits the VMEbus 16 MHz DTB cycle timing with margin for address-valid to DTACK* decoding across industrial temperature extremes. The plastic DIP-40 package also suits the ruggedized through-hole construction preferred in many legacy military and industrial backplane assemblies. With its authorized-continuation status from Rochester Electronics, the EP910PI-35 supports long-lifecycle programs where the VME/cPCI chassis is expected to remain in service for 20+ years.
Recommended
TTL MSI State-Machine Replacement
The EP910PI-35 fits TTL MSI state-machine replacement because it can replace 4-8 packages of 74LS/74S flip-flops, decoders, and PALs with a single programmable device, reducing PCB area and BOM count in legacy industrial controllers. Each macrocell embeds a flip-flop plus combinatorial logic, so a 24-macrocell EPLD can implement state machines of up to 24 states - covering the vast majority of factory automation sequencer designs. The 35 ns tPD supports state-machine clock rates up to 28.6 MHz, which is well above the typical 1-5 MHz scan rates used in PLC ladder-equivalent logic. Because the design is captured in software (MAX+PLUS II), firmware revisions can be made by re-EPROMing without board rework.
Recommended
Military/Avionics Display and Control Logic
The EP910PI-35 fits avionics display and control applications because its DIP-40 package, 5 V supply, and Altera EP910 die have decades of flight-qualified heritage and are explicitly listed on Rochester Electronics' authorized-continuation inventory for EOL-prone legacy programs. The 24 macrocells implement discrete-to-discrete logic for cockpit display drivers, mode selectors, and warning-system controllers without the obsolescence risk of newer CPLD families. The 35 ns tPD fits the slow update rates of legacy NTSC-compatible avionics displays (typically 50-60 Hz field refresh with multi-millisecond compute budgets). Rochester's MIL-spec screening and traceable lot records also satisfy DO-254 design-assurance requirements for many legacy platforms.
Recommended
Industrial PLC I/O Expansion Logic
The EP910PI-35 fits PLC I/O expansion modules because its 24 I/O pins can map directly to a 24-channel digital input or output card, providing per-channel debounce, isolation-buffer logic, and protocol framing in a single chip. The 35 ns tPD handles 100 kHz digital-input sampling rates with margin for contact-bounce filtering and opto-isolator propagation delays. Its CMOS 5 V I/O interfaces to standard 24 V PLC backplanes through external resistor dividers or optocouplers without additional buffer ICs. With Rochester Electronics' authorized-continuation inventory, factory-automation OEMs can keep producing PLC modules whose original Altera EP910 design is no longer risk-free to source from brokers.
Recommended
Test Equipment and ATE Pin-Driver Logic
The EP910PI-35 fits automatic test equipment (ATE) pin-driver and pattern-generation logic because its 24 macrocells can implement per-pin waveform synthesizers, comparator window-comparators, and fail-capture latches in a single device, replacing racks of discrete ECL/TTL ICs. The 35 ns tPD supports test rates up to ~28 MHz, sufficient for legacy bench-top IC testers targeting TTL/CMOS devices in the 1-25 MHz range. The plastic DIP-40 package is well-suited to ATE fixture cards, which are typically rebuilt every 5-10 years as test programs evolve. Designers can re-program the EPLD in-circuit via the Altera programming header to support new device-under-test (DUT) families without redesigning the fixture.
Recommended
Recommended Products Summary
Engineering reference data for EP910PI-35 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | EP910PC-35 | EP910LI-35 | EP910DC-35 | EP910PI-25 | EP910PI-30 |
|---|---|---|---|---|---|---|
| Brand | Rochester Electronics (Altera die) | Rochester Electronics (Altera die) | Rochester Electronics (Altera die) | Rochester Electronics (Altera die) | Rochester Electronics (Altera die) | Rochester Electronics (Altera die) |
| Package | PDIP-40 | PDIP-40 - same | PDIP-40 - same | PDIP-40 (CERDIP) - same footprint | PDIP-40 - same | PDIP-40 - same |
| Macrocells | 24 | 24 | 24 | 24 | 24 | 24 |
| Usable Gates | 450 | 450 | 450 | 450 | 450 | 450 |
| Propagation Delay (tPD) | 35 ns | 35 ns | 35 ns | 35 ns | 25 ns (-29%, faster) | 30 ns (-14%, faster) |
| Maximum Frequency (fMAX) | 28.6 MHz | 28.6 MHz | 28.6 MHz | 28.6 MHz | ~35.7 MHz (+25%) | ~33.3 MHz (+16%) |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Erasure Method | One-time-programmable (OTP) | OTP | UV-erasable (windowed) | UV-erasable (windowed CERDIP) | OTP | OTP |
Key Differentiators
- Authorized continuation supply from Rochester Electronics (vs Broker / unauthorized reseller EP910PI-35 stock)
- Plastic DIP-40 form factor (vs windowed ceramic alternatives) (vs EP910LI-35 (windowed ceramic DIP))
- Mid-range 35 ns speed grade balances cost and timing margin (vs EP910PI-25 (25 ns speed grade))
Design Notes
The EP910PI-35 pre-dates JTAG and uses Altera's legacy programming interface. Modern USB-Blaster or JTAG-only programmers will NOT work without an adapter. For prototype programming, use the Altera PL-MPU Master Programming Unit with a DIP-40 adapter socket, or a compatible third-party programmer such as the BP-1200. Design files (JEDEC fuse-map) must be generated with MAX+PLUS II version 10.23 baseline or earlier - newer Quartus software does not support the EP910 family.
Estimated: at 5 V VCC and CMOS input levels, the EP910PI-35 typically draws ~50-100 mA ICC during DC operation and ~150 mA peak during programming pulses. Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VCC pin (pin 38) and a bulk 10 uF tantalum or aluminum electrolytic on the supply rail. Because the device has only one VCC pin (no separate VCCIO/VCCA), a single 5 V rail suffices, but for designs with high-noise switching converters nearby add an LC pi-filter (10 uH + 10 uF) ahead of the VCC pin.
The DIP-40 footprint uses 2.54 mm (0.100 inch) pin pitch with 0.6 mm (0.024 inch) through-hole pads. Reserve at least 0.5 inch of clearance above the package top for IC extraction tools, and ensure the IC socket (if used) is a high-quality machined-pin type with low contact resistance - press-fit sockets are recommended for any field-replaceable application. For avionics and high-vibration environments, conformal coating is advised and the CERDIP EP910DC-35 variant is preferred for its hermeticity.
The EP910PI-35 35 ns tPD is sufficient for 8-10 MHz bus-cycle decoding but introduces ~3-4 logic-level delays compared to discrete 74FCT gates. When interfacing to fast microprocessors (>16 MHz), use the faster EP910PI-25 or EP910PI-20 speed grade to avoid missing address-valid-to-chip-select timing windows. Unused I/O pins should be configured as outputs driving LOW (or left NC for the JTAG-disabled variants) to minimize power and noise; floating inputs can inject oscillator noise into the internal macrocell array.
Compliance Information
Original Altera EP910 family pre-dates RoHS (2006). Rochester Electronics may offer both RoHS-compliant and SnPb lead-bearing variants depending on lot. AEC-Q100 not applicable (industrial/military, not automotive qualified).
