ATF16V8C-7PI - 7ns 16V8 EECMOS PLD | Microchip
MPN: ATF16V8C-7PI ✓ ActiveATF16V8C-7PI Overview
An EECMOS PLD is a user-programmable digital logic device within the broader semiconductor and logic-IC hierarchy. Its Flash configuration memory allows a design to retain programmed Boolean equations after power removal, avoiding separate EPROM programming equipment. The ATF16V8C architecture implements a superset of generic 16R8 and many 20-pin combinatorial PAL architectures, providing eight product terms per output and flexible registered, combinatorial, and complex-mode configurations.
Key features include a 7 ns maximum propagation delay for the -7 grade, eight macrocells, eight I/O outputs, a nominal 5 V operating supply, and low-power pin-controlled shutdown. The family supports operating speeds down to 5 ns, while the -7PI order code represents a 7 ns industrial-temperature option. Flash programmability simplifies in-circuit updates, and the device provides a practical migration path for compact glue-logic implementations formerly handled by multiple 20-pin PAL devices.
The ATF16V8C uses EECMOS technology to combine nonvolatile configuration with CMOS-compatible logic. Product terms are automatically distributed among the eight macrocells according to the selected architecture and equations, allowing moderately complex control, decode, interface, and glue-logic functions in one package. CMOS and TTL compatibility simplifies connections to older host buses and peripheral logic, although designers should still verify voltage and timing requirements for every connected device.
Typical applications include industrial interface decoding, legacy bus-control logic, address decoding, command multiplexing, alarm and sequencing logic, and compact peripheral adapters. The 20-pin PDIP format is especially useful for prototypes, legacy industrial equipment, and through-hole assemblies where a low-density programmable logic device is preferred over a larger FPGA or microcontroller.
Design consideration: programmers should validate the JEDEC fuse state, operating-mode assignments, and AC timing against the actual board loads. Because the ATF16V8C is a fixed-architecture PLD rather than a general-purpose processor, it is most appropriate when the required Boolean equations fit within eight macrocells and eight product terms per output.
This page consolidates verified manufacturer and distributor information, package-specific alternatives, pricing availability, pin assignments, and practical selection guidance. It also distinguishes true pin-compatible options from related speed grades that may alter timing margins even when they use the same PDIP footprint.
Drop-in alternatives for ATF16V8C-7PI — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
ATF16V8C-5PI
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ATF16V8C-10PI
✅ Drop-In📋 Reference alternative (not in catalog)
ATF16V8C-15PI
✅ Drop-In📋 Reference alternative (not in catalog)
ATF16V8C-20PI
✅ Drop-In📋 Reference alternative (not in catalog)
ATF16V8C-7PI Maximum Ratings & Electrical Characteristics
| Device Type | 16V8 programmable logic device (PLD) |
| Technology | High-performance EECMOS |
| Configuration Memory | Electrically erasable Flash memory |
| Macrocells | 8 macrocells |
| Outputs | 8 outputs |
| Product Terms per Output | 8 product terms |
| Maximum Pin-to-Pin Delay | 7 ns |
| Family Minimum Speed | 5 ns |
| Nominal Supply Voltage | 5 V |
| Industrial Supply Range | 5 V ±10% |
| Commercial Supply Range | 5 V ±5% |
| Power-Down Current | 100 µA pin-controlled |
| Logic Compatibility | CMOS and TTL compatible |
| Package | 20-pin PDIP |
| Package Pitch | 7.62 mm (0.300 inch) |
| Mounting Type | Through-hole |
| Temperature Grade | Industrial |
ATF16V8C-7PI Pin Configuration
| Pin 1 | CLK — Clock input |
| Pin 2 | I0 — Input or I/O path 0 |
| Pin 3 | I1 — Input or I/O path 1 |
| Pin 4 | I2 — Input or I/O path 2 |
| Pin 5 | I3 — Input or I/O path 3 |
| Pin 6 | I4 — Input or I/O path 4 |
| Pin 7 | I5 — Input or I/O path 5 |
| Pin 8 | I6 — Input or I/O path 6 |
| Pin 9 | GND — Ground reference |
| Pin 10 | PD — Power-down control input |
| Pin 11 | I7 — Input or I/O path 7 |
| Pin 12 | O7 — Output or I/O path 7 |
| Pin 13 | O6 — Output or I/O path 6 |
| Pin 14 | O5 — Output or I/O path 5 |
| Pin 15 | O4 — Output or I/O path 4 |
| Pin 16 | O3 — Output or I/O path 3 |
| Pin 17 | O2 — Output or I/O path 2 |
| Pin 18 | O1 — Output or I/O path 1 |
| Pin 19 | O0 — Output or I/O path 0 |
| Pin 20 | VCC — Positive supply input |
Typical Applications
ATF16V8C-7PI is suitable for 6 applications: Industrial Address Decoding, Legacy Bus Command Multiplexing, Alarm and Sequencing Control, Peripheral Adapter Glue Logic, Test and Fixture Control Logic, Retrofit and Obsolescence Replacement.
Industrial Address Decoding
The ATF16V8C-7PI fits legacy industrial control boards that require several chip-select or address-decode outputs without a larger controller. Its eight macrocells can form Boolean decode equations, while the 7 ns maximum pin-to-pin delay provides margin for a 5 V CMOS interface. The device is installed between an address bus and peripheral enables, and its Flash configuration retains the logic after power cycling. The principal constraint is that each output supports eight product terms, so unusually complex decoding may need multiple devices or a higher-density PLD.
Recommended
Legacy Bus Command Multiplexing
The ATF16V8C-7PI can implement command decoding and data-path multiplexing around older 5 V peripheral buses. Its CMOS and TTL compatibility permits direct interfacing with conventional TTL devices, while the 7 ns speed grade is useful when command or select signals must be generated within a narrow access-time window. Engineers can program the Flash-based logic, verify timing against the slowest connected bus device, and preserve the programmed configuration during power loss. This makes the PLD useful where redesigning a legacy host interface around a larger FPGA would be unnecessarily costly.
Recommended
Alarm and Sequencing Control
The ATF16V8C-7PI is suitable for compact alarm, interlock, and startup-sequencing logic in industrial control systems. Eight macrocells can combine sensor conditions into outputs that trigger relays, indicators, or shutdown requests, and the nonvolatile Flash configuration avoids repeated field programming. Its 7 ns propagation delay helps prevent long combinational delays in the decision path. The design should still include fail-safe behavior, because a programmable logic device cannot independently provide the safety certification or redundancy expected from a safety-rated control system.
Recommended
Peripheral Adapter Glue Logic
The ATF16V8C-7PI can bridge mismatched legacy peripheral interfaces by translating command formats, generating enables, and combining interrupt signals. Eight I/O outputs provide flexible routing for control signals, and the 20-pin PDIP package is convenient for prototypes, proof-of-concept hardware, and through-hole repairs. With a 7 ns maximum pin-to-pin delay and 5 V CMOS operation, the device addresses many TTL-era systems. Final implementation must verify signal direction in each configured macrocell and ensure that the programmed equations remain compatible with the target adapter firmware.
Recommended
Test and Fixture Control Logic
The ATF16V8C-7PI is appropriate for test fixtures and legacy instrumentation that require deterministic pattern generation, relay-control decoding, or measurement-sequence coordination. The 7 ns speed rating provides useful timing margin relative to older TTL glue logic, while the Flash configuration allows a fixture to retain its control equations. The 20-pin PDIP footprint supports through-hole fixture boards and straightforward replacement. Engineers should account for input noise, unused-pin behavior, and output contention when combining the PLD with external test equipment, and verify all transitions with the actual loading arrangement.
Recommended
Retrofit and Obsolescence Replacement
The ATF16V8C-7PI can support a targeted redesign of equipment built around older PAL-family logic, especially where the original PLD is difficult to procure. Its architecture implements a superset of the generic 16R8 family and many 20-pin combinatorial PLDs, helping preserve board-level integration. A migration should compare the original fuse map, pin assignments, operating mode, and timing before programming the EECMOS device. Because this part offers a 7 ns maximum delay, it can provide timing improvement over older 15 ns or 20 ns implementations while preserving a standard 20-pin PDIP footprint.
Recommended
Recommended Products Summary
Engineering reference data for ATF16V8C-7PI — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATF16V8C-5PI | ATF16V8C-10PI | ATF16V8C-15PI | ATF16V8C-20PI |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP | 20-pin PDIP |
| Maximum Pin-to-Pin Delay | 7 ns | 5 ns | 10 ns | 15 ns | 20 ns |
| Architecture | 16V8 EECMOS PLD | 16V8 EECMOS PLD | 16V8 EECMOS PLD | 16V8 EECMOS PLD | 16V8 EECMOS PLD |
| Macrocells | 8 macrocells | 8 macrocells | 8 macrocells | 8 macrocells | 8 macrocells |
| Configuration Memory | Electrically erasable Flash | Electrically erasable Flash | Electrically erasable Flash | Electrically erasable Flash | Electrically erasable Flash |
| Nominal Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Power-Down Current | 100 µA pin-controlled | 100 µA pin-controlled | 100 µA pin-controlled | 100 µA pin-controlled | 100 µA pin-controlled |
| Logic Compatibility | CMOS and TTL compatible | CMOS and TTL compatible | CMOS and TTL compatible | CMOS and TTL compatible | CMOS and TTL compatible |
Key Differentiators
- Better timing margin than the 10 ns speed grade (vs ATF16V8C-10PI)
- Higher speed than the 15 ns grade (vs ATF16V8C-15PI)
- Timing balance within the ATF16V8C family (vs ATF16V8C-5PI)
Design Notes
Do not treat a shared PDIP footprint as proof of drop-in equivalence. ATF16V8C-10PI, ATF16V8C-15PI, and ATF16V8C-20PI retain the package and architecture but have progressively higher maximum pin-to-pin delays than the 7 ns target. Compare the worst-case board delay, setup time, hold time, and connected-device access time before substitution. Also verify that the replacement uses the same EECMOS configuration method and program file.
The ATF16V8C family operates from a nominal 5 V rail, with the industrial speed ranges specified over 5 V ±10%. Decoupling should follow the manufacturer datasheet and be placed close to VCC and GND to limit supply transients that can affect programmable logic outputs. The PD pin provides a pin-controlled power-down option with 100 µA current in the described family implementation, but external pull-up or pull-down requirements must be confirmed for the programmed configuration and unused-pin treatment.
Analyze each critical path using the 7 ns maximum pin-to-pin delay together with input, output, and external-device timing rather than relying on the nominal delay alone. CMOS and TTL compatibility simplifies legacy interfacing, but mixed-family boards can still experience ringing, contention, or logic-threshold differences. Keep the PLD close to the associated logic where practical, route clock and control signals away from noisy switching nodes, and validate the programmed operating mode using worst-case supply and temperature conditions.
Compliance Information
The verified data does not explicitly state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status for this order code. AEC-Q100 is not applicable because this is a programmable logic device rather than an automotive-qualified product.
