ATF16V8C-7SC - 7.5ns EECMOS PLD | Microchip | Logic Control
MPN: ATF16V8C-7SC ✓ ActiveATF16V8C-7SC Overview
A programmable logic device is a semiconductor whose internal digital functions are configured by stored programming data. In the product hierarchy, the ATF16V8C-7SC is a PLD, a specialized logic IC, and an integrated circuit. Its architecture can emulate many 20-pin PAL devices and most 20-pin combinatorial PLDs, providing a practical way to consolidate several fixed gate functions into one configurable device.
Key features include eight macrocells, eight product terms allocated to each output, a 7.5 ns speed grade, and a pin-controlled power-down option that reduces supply current to 100 µA. Inputs and outputs support CMOS and TTL interfacing, while I/O pin-keeper circuitry helps retain input states. The device is specified for a commercial 5 V ±5% supply range, while faster and industrial-grade options are available elsewhere in the ATF16V8C family.
The ATF16V8C incorporates a superset of the generic architectures used by the 16R8 family and many 20-pin combinatorial PLDs. Software automatically configures three operating modes, allowing the same physical device to support different registered, combinatorial, and mixed logic organizations. This flexibility makes it useful for legacy PAL replacement and compact control logic consolidation.
Typical applications include industrial control interfaces, legacy 20-pin PAL replacement, address decoding, command and status logic, interface control, and fixed-function logic consolidation. The 20-SOIC package supports conventional surface-mount assembly, while electrically erasable flash technology allows a device to be reprogrammed without removing it from the circuit.
Designers should verify the exact pinout, programming architecture, supply tolerance, and timing constraints against the manufacturer datasheet before substitution. A speed-grade change can affect system timing even when the package is unchanged, and an industrial-grade replacement may have different operating and qualification requirements.
This page consolidates manufacturer specifications, sourcing information, package details, practical engineering guidance, and validated drop-in candidates. It also distinguishes genuine pin-compatible alternatives from slower family members that may require timing review.
Drop-in alternatives for ATF16V8C-7SC — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
ATF16V8C-7SU
✅ Drop-In📋 Reference alternative (not in catalog)
ATF16V8C-7SC Maximum Ratings & Electrical Characteristics
| Device Type | High-performance EECMOS programmable logic device |
| Macrocell Count | 8 macrocells |
| Maximum Pin-to-Pin Delay | 7.5 ns |
| Family Maximum Pin-to-Pin Delay | 5 ns |
| Product Terms per Output | 8 product terms |
| Configuration Memory | Electrically erasable flash memory |
| Commercial Supply Voltage | 5 V ±5% |
| Industrial Family Supply Voltage | 5 V ±10% |
| Power-Down Current | 100 µA |
| Logic Compatibility | CMOS and TTL compatible |
| Architecture Compatibility | 16R8 family and most 20-pin combinatorial PLDs |
| Operating Modes | 3 software-configured modes |
| Package | 20-SOIC |
| Package Width | 7.50 mm |
| Package Width | 0.295 inch |
| Mounting Type | Surface mount |
| I/O Pin Keeper | Yes |
ATF16V8C-7SC Pin Configuration
| Pin 1 | I/O0 — Configurable input/output associated with macrocell 0 |
| Pin 2 | I/O1 — Configurable input/output associated with macrocell 1 |
| Pin 3 | I/O2 — Configurable input/output associated with macrocell 2 |
| Pin 4 | I/O3 — Configurable input/output associated with macrocell 3 |
| Pin 5 | I/O4 — Configurable input/output associated with macrocell 4 |
| Pin 6 | I/O5 — Configurable input/output associated with macrocell 5 |
| Pin 7 | I/O6 — Configurable input/output associated with macrocell 6 |
| Pin 8 | GND — Ground connection |
| Pin 9 | I/O7 — Configurable input/output associated with macrocell 7 |
| Pin 10 | GND — Ground connection |
| Pin 11 | I/O8 — Configurable input/output associated with macrocell 8 |
| Pin 12 | I/O9 — Configurable input/output associated with macrocell 9 |
| Pin 13 | I/O10 — Configurable input/output associated with macrocell 10 |
| Pin 14 | I/O11 — Configurable input/output associated with macrocell 11 |
| Pin 15 | I/O12 — Configurable input/output associated with macrocell 12 |
| Pin 16 | I/O13 — Configurable input/output associated with macrocell 13 |
| Pin 17 | I/O14 — Configurable input/output associated with macrocell 14 |
| Pin 18 | I/O15 — Configurable input/output associated with macrocell 15 |
| Pin 19 | VCC — Positive supply connection |
| Pin 20 | OE — Output-enable control |
Typical Applications
ATF16V8C-7SC is suitable for 6 applications: Industrial Control and Automation Logic, Legacy 20-Pin PAL Replacement, Address and Command Decoding, Interface Control Logic, Programmable Instrumentation Front Panels, Low-Power Standby Control.
Industrial Control and Automation Logic
The ATF16V8C-7SC is suitable for consolidating deterministic control functions in industrial equipment because it provides eight macrocells with eight product terms per output and a 7.5 ns maximum pin-to-pin delay. It can implement interlocks, sequencing, command decoding, and status logic where a collection of discrete gates would be inefficient. Electrically erasable flash configuration allows the same board layout to be revised during commissioning without replacing the device. The 5 V ±5% commercial supply range and CMOS/TTL-compatible I/O simplify connection to legacy 5 V control logic. Engineers should still validate propagation timing against the worst-case system path and confirm whether industrial temperature requirements justify selecting a different -SU-family ordering code.
Recommended
Legacy 20-Pin PAL Replacement
The ATF16V8C-7SC can replace many 20-pin PAL and combinatorial PLD designs because its architecture is a superset of the generic 16R8 family. Eight configurable macrocells provide more flexibility than a simple fixed gate count, while three software-selected operating modes support registered, combinatorial, and mixed logic organizations. This makes the device useful when maintaining older control boards whose original PLDs are difficult to source. A migration must include a complete pin-by-pin comparison, fuse-map conversion, timing analysis, and output-state review. The 7.5 ns speed grade is substantially faster than the 15 ns ATF16V8B-15SU reference, preserving more timing margin in legacy control paths.
Recommended
Address and Command Decoding
The ATF16V8C-7SC is appropriate for address decoding, chip-select generation, and command interpretation in compact 5 V systems. Eight outputs with eight product terms each can implement several related decoding functions while reducing the component count and board area associated with fixed gate arrays. The 7.5 ns maximum pin-to-pin delay provides useful timing margin for register-based interfaces, while CMOS and TTL-compatible I/O supports direct connection to suitable legacy devices. Designers should define each output equation and active polarity in the programming tool, then verify setup and hold requirements at the connected device. Pin-keeper behavior should also be considered where an input may float during reset or power transitions.
Recommended
Interface Control Logic
The ATF16V8C-7SC can implement protocol sequencing, handshake generation, transfer-direction control, and status multiplexing in embedded interface circuits. Its eight macrocells allow related control functions to be consolidated, while electrically erasable flash permits rapid firmware-linked logic changes during product revision. The CMOS and TTL-compatible I/O simplifies interfacing with 5 V peripheral devices, and the pin-controlled power-down option can reduce current to 100 µA when the interface is idle. Designers should account for output contention, input thresholds, and the behavior of tristated or latched outputs during configuration. System timing must be checked against the 7.5 ns pin-to-pin delay, especially where external latches or handshake round trips add delay.
Recommended
Programmable Instrumentation Front Panels
The ATF16V8C-7SC is useful in test and measurement equipment where panel indicators, mode controls, and status signals require flexible logic. Eight programmable outputs can consolidate display-enable, relay-control, range-select, and fault-latch functions without a large gate-array implementation. Its 7.5 ns delay is more than adequate for slow human-interface control paths, while the 20-SOIC package simplifies repair and cross-reference to established 20-pin PLD layouts. Electrically erasable configuration is particularly helpful during prototype development because logic equations can be revised without changing the PCB. Designers should still account for output drive, relay-coil flyback paths, connector protection, and grounding because the PLD is intended for logic rather than direct high-energy load driving.
Recommended
Low-Power Standby Control
The ATF16V8C-7SC supports a pin-controlled power-down mode with 100 µA specified current, allowing logic to remain configured while reducing consumption during inactive periods. This is useful in supervisory, standby, and intermittently powered systems where the programmed equations must be retained but continuous operation is unnecessary. Electrically erasable flash retains the configuration independently of the power-down control, enabling rapid wake-up without reloading a fuse map. Design care is required to ensure the power-down pin is properly driven, wake-up timing meets the host requirement, and I/O states do not create unsafe transitions. The 7.5 ns device speed is normally sufficient for standby-control paths, but timing should be verified in the complete reset and power-management sequence.
Recommended
Recommended Products Summary
Engineering reference data for ATF16V8C-7SC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ATF16V8C-7SU | ATF16V8B-15SU |
|---|---|---|---|
| Package | 20-SOIC | 20-SOIC - same | 20-SOIC - same package but not timing-equivalent |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Pin-to-Pin Delay | 7.5 ns | 7 ns | 15 ns |
| Macrocell Count | 8 macrocells | 8 macrocells | 8 macrocells |
Key Differentiators
- Faster timing than the slower 20-SOIC family reference (vs ATF16V8B-15SU)
- Near-identical speed with additional timing margin (vs ATF16V8C-7SU)
- Electrically erasable configuration supports design revisions (vs ATF16V8B-15SU)
Design Notes
Do not assume that every 20-SOIC ATF16V8 family member is a drop-in replacement. The ATF16V8C-7SU is 7 ns versus the target’s 7.5 ns, while the ATF16V8B-15SU is 15 ns and therefore 100% slower on the verified timing parameter. Validate pin names, programmed architecture, commercial versus industrial grading, output-enable behavior, and timing margin before approving a substitution.
The verified family data specifies a 100 µA pin-controlled power-down mode, but that is not the device’s active operating current. Drive the power-down pin from a defined logic state and add external pull resistors where required so the PLD cannot enter an unintended state during reset. Validate the complete host-to-PLD wake sequence and check all connected I/O pins for contention during mode transitions.
Keep the 20-SOIC footprint and decoupling layout consistent with the manufacturer recommendations for the selected architecture. Provide a low-impedance supply and ground path, place bypass capacitance close to the supply pins, and route high-speed or noise-sensitive signals away from the package where practical. Confirm the final pin assignments in the programming output before releasing the PCB artwork.
Compliance Information
The supplied verified data references RoHS and REACH only generically in a comparison listing and does not provide a target-specific compliance declaration. AEC-Q100 qualification, lead-free status, halogen-free status, and conflict-minerals declarations are therefore marked unknown rather than inferred.
