ATF16V8B-15PC - 15 ns 250-Gate EEPLD | Microchip Technology
MPN: ATF16V8B-15PC ✓ ActiveATF16V8B-15PC Overview
An EEPLD is a simple programmable logic device within the broader programmable-logic-device hierarchy. Unlike a mask-programmed or one-time-programmable PAL, an EEPLD retains its configuration in nonvolatile Flash memory and can be updated during design, prototyping, or field maintenance. The ATF16V8B family is intended for compact combinatorial and registered logic implementations where a small gate count and familiar 20-pin architecture are advantageous.
Key features include a 250-gate equivalent capacity, as many as 16 inputs, eight configurable I/O paths, 5 V operation, and a 15 ns device rating. The ATF16V8B family also provides speed options down to 7.5 ns, while the selected ATF16V8B-15PC variant is identified by the 15 ns suffix. Its electrically erasable Flash configuration permits design revisions without replacing the device.
The ATF16V8B architecture supports software-selected operating modes and is intended to emulate common 16R8 devices and many 20-pin combinatorial PLDs. Eight outputs are allocated eight product terms each, allowing the device to implement multiple sum-of-products functions and registered logic in a compact package. A microchip product page describes the device as a 250-gate, standard-power, green-package EEPLD with a 5 V supply and up to 16 inputs.
Typical applications include industrial control logic, legacy peripheral emulation, address decoding, interface decoding, glue logic, counter and state-machine implementations, and compact control panels. The ATF16V8B-15PC is especially useful when an existing design uses a 20-pin PAL-style footprint and the new design benefits from a rewritable configuration memory.
The principal engineering consideration is timing. The 15 ns suffix denotes a defined speed grade, but board-level setup, hold, interconnect delay, and output loading must be included in timing analysis. Existing PAL or GAL footprints should also be checked against the Microchip replacement guidance because electrical characteristics are similar but may contain minor differences.
This page combines verified manufacturer and distributor information, a same-package replacement assessment, and practical selection guidance. It distinguishes documented facts from parameters that still require confirmation from the full manufacturer datasheet, helping engineers evaluate the ATF16V8B-15PC without relying on an incomplete distributor summary.
Drop-in alternatives for ATF16V8B-15PC — 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 ATF16V8B-15PC (same form factor and footprint) — differing in Package, Mounting Type, I/O Count, Product Terms per Output, Architecture.
ATF16V8CZ-15PC
✅ Drop-In📋 Reference alternative (not in catalog)
ATF16V8B-15PC Maximum Ratings & Electrical Characteristics
| Device Type | Electrically erasable programmable logic device (EEPLD) |
| Programmable Gate Capacity | 250 gates |
| Maximum Inputs | Up to 16 inputs |
| I/O Count | 8 I/Os |
| Macrocell Count | 8 macrocells |
| Speed Grade | 15 ns |
| Family Maximum Pin-to-Pin Delay | 7.5 ns |
| Supply Voltage | 5 V |
| Configuration Technology | Electrically erasable Flash memory |
| Logic Architecture | 16V8 architecture with 8 outputs |
| Output Product-Term Allocation | 8 product terms per output |
| Operating Mode Support | Three software-selected modes of operation |
| Power Class | Standard power |
| Package | 20-pin PDIP |
| Package Pitch | 7.62 mm (0.300 inch) |
| Package Finish | Green package |
| Mounting Type | Through-hole |
| Family Standby Current | 5 mA |
| RoHS Status | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
ATF16V8B-15PC green package Pin Configuration Guide
Pin configuration for ATF16V8B-15PC (green package package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for ATF16V8B-15PC.
Refer to the datasheet for full pin configuration.
Typical Applications
ATF16V8B-15PC is suitable for 6 applications: Legacy PAL Interface Emulation, Industrial Control and Interlock Logic, Address and Command Decoding, Counter and State-Machine Logic, Test and Measurement Fixtures, Communication and Data-Format Conversion.
Legacy PAL Interface Emulation
The ATF16V8B-15PC is appropriate for replacing a 16V8-style PAL interface when the target uses a 20-pin PDIP footprint and requires a rewritable configuration. Its documented 250-gate capacity, 8 macrocells, up to 16 inputs, and 8 I/Os support compact decoding and registered-control functions. The 15 ns grade provides a defined timing target, but engineers should confirm pin assignments, setup and hold requirements, and the JEDEC fuse map against the original design before substitution.
Industrial Control and Interlock Logic
The ATF16V8B-15PC can implement compact interlocks, sequencing, and machine-control decisions when a small amount of combinational or registered logic is required. Its 8 macrocells and 250-gate equivalent capacity are suitable for decoding switch states and coordinating actuators, while the 20-pin PDIP package supports through-hole assembly and legacy control-board layouts. The verified operating-temperature range is unavailable, so industrial deployment requires confirmation from the manufacturer datasheet.
Address and Command Decoding
For peripheral address decoding, the ATF16V8B-15PC offers up to 16 inputs and eight configurable I/O paths in a 20-pin package. These resources suit decode equations, chip-selection logic, and command qualification without using a larger microcontroller. Its electrically erasable Flash configuration allows firmware-like design revisions, while the 15 ns rating helps engineers assess setup and combinational timing budgets on the assembled board.
Counter and State-Machine Logic
The registered operating modes of the ATF16V8B architecture make the ATF16V8B-15PC applicable to small counters, sequence detectors, and asynchronous state machines. Eight macrocells provide a practical resource limit for the next-state and output equations, and the device supports up to 16 external inputs. Designers should use the manufacturer programming tool and timing specifications to confirm whether each macrocell mode satisfies the required clocking and feedback arrangement.
Test and Measurement Fixtures
A 20-pin ATF16V8B-15PC can provide configurable stimulus routing, mode selection, and measurement-fixture control in a compact instrument. Rewritable Flash configuration is useful when prototype boards require logic revisions without replacing the PLD. The 15 ns speed grade supports moderate-speed decoding, but fixture timing must include connector, cable, and instrument-output delays. The verified data does not establish a specific operating-temperature grade.
Communication and Data-Format Conversion
The ATF16V8B-15PC can implement small parallel-to-serial framing helpers, protocol qualification logic, and data-format adapters where the system requires more flexibility than fixed combinational gates. Its 8 macrocells and 16-input limit make it best suited to modest control paths rather than throughput-intensive datapaths. Engineers should validate setup time, hold time, clock skew, and registered-output behavior using the manufacturer timing diagrams and the actual board loading.
Engineering reference data for ATF16V8B-15PC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATF16V8CZ-15PC |
|---|---|---|
| Package | 20-pin PDIP | 20-pin PDIP |
| Brand | Microchip Technology | Microchip Technology |
| Device Type | Electrically erasable Flash PLD | Electrically erasable Flash PLD |
| Speed Grade | 15 ns | 15 ns |
| Mounting Type | Through-hole | Through-hole |
Key Differentiators
- Electrically erasable Flash configuration (vs One-time-programmable GAL16V8 devices)
- Documented 15 ns speed grade (vs ATF16V8CZ-15PC)
- Compact 250-gate, 8-macrocell implementation (vs Larger programmable-logic devices)
Design Notes
Do not treat a shared 16V8 architecture as proof of a drop-in replacement. Although Microchip states that ATF16V8B and ATF16V8C devices are pin-to-pin and JEDEC fusemap compatible with GAL16V8 replacements, AC and DC characteristics can differ. Verify the exact package, speed grade, power mode, input thresholds, output behavior, timing limits, and programming file before substituting ATF16V8CZ-15PC.
Base timing closure on the manufacturer timing definitions and the assembled PCB rather than the 15 ns suffix alone. Account for input setup and hold requirements, propagation delay, output loading, clock skew, connector delay, and external feedback paths. The ATF16V8B family supports multiple operating modes, so the constraints and achievable clock rate depend on whether the selected macrocells operate combinationally or registered.
For a legacy PAL board, inspect the original 20-pin PDIP footprint, pin 1 orientation, and clearance before fitting the ATF16V8B-15PC. The verified package is a 7.62 mm-pitch PDIP, but footprint compatibility does not confirm signal-level compatibility. Review unused pins, programming access requirements, supply decoupling, ground-return paths, and any programming or test hardware needed to reprogram the Flash configuration.
Compliance Information
The verified Microchip product page identifies the ATF16V8B as a green package, but the supplied extracts do not explicitly establish RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is marked not applicable because this is a general-purpose PLD rather than an automotive-qualified variant.
