ATF16V8BQL-15XU

ATF16V8BQL-15XU is a small, non-volatile CPLD from Atmel’s ATF16V8 family (now Microchip). It provides 16 macrocells in a compact interconnect fabric, suitable for glue logic, simple state machines, decoding, and control logic. The device uses on-chip flash/configuration memory, so it retains programming across power cycles and doesn’t require an external ROM. It is a 5V-tolerant device with a speed grade of -15 (roughly 15 ns). The BQL suffix denotes the package/temperature code, while XU indicates a specific packaging/version variant. It offers a programmable interconnect network among macrocells and user I/Os, with configurable I/O options (input, output, or bidirectional). Typical applications include peripheral interface decoders, debouncing, clock-domain crossing, and other small-scale logic that benefits from a reconfigurable, low-cost device. Programming is done with Atmel’s (Microchip’s) programming tools using the CPLD bitstream.

Direct equivalents are 16V8-type PLDs/GALs. Common substitutes: Lattice GAL16V8 (GAL16V8 series), ON Semiconductor/AMD AMF16V8B, Microchip/Atmel ATF16V8B family and generic PAL16V8/16V8B devices. PEEL18CV8-style PLDs may also be drop-in in some designs. Always verify pinout, voltage, timing (–15 speed), and programming/JED file compatibility before replacing.

ATF16V8BQL-15XU is a small flash-based CPLD. Key features:
- 16 macrocells for glue logic, simple state machines, and basic combinational/sequential circuits
- Flash/non-volatile configuration memory (no external PROM required); instant-on
- In-system programming via SPI-compatible interface (and boundary-scan/test options in some packages)
- 5V-tolerant user I/O with CMOS logic levels (up to ~16 I/O pins, depending on package)
- Static operation (no clock needed) with programmable interconnect
- -15XU speed grade (feature suited for moderate-speed glue logic)
- Small package option (BQL family) suitable for compact designs
- Industrial temperature range and RoHS-compliant
Note: exact I/O count and package details vary by specific part variant; consult the datasheet for the precise pin count, I/O wiring, and timing.

Pin count: 20 pins (20-pin PLCC/DIP package variant for ATF16V8B series — the “QL-15XU” is a 20-pin PLD package variant).
Function: ATF16V8B is a 16V8 complex programmable logic device (EPLD/GLD) providing programmable glue logic — up to eight macrocells (outputs, each configurable as registered or combinatorial) with the remaining package pins used as inputs/I/O, plus VCC and GND. It implements PAL/GAL-style sum-of-products logic for decoders, state machines and general combinational/sequential functions.

- Manufacturer: Advanced Micro Devices, Inc. (AMD).
- What kind of company: AMD is an American multinational semiconductor company that designs and manufactures integrated circuits, including CPUs, GPUs, and other semiconductor products.

ATF16V8BQL-15XU is a small CPLD ideal for digital glue logic. Typical application areas:
- Glue logic for microcontrollers/memories: address decoding, chip selects, control signals
- State machines and timing/control sequencing
- I/O expansion and interface bridging to peripherals
- Clock domain crossing and simple clock/timing generation
- Look-up tables, small ROMs, and combinational/sequential logic
- Debouncing, keypad scanning, LED drivers, simple sensor interfaces
- Lightweight protocol interfaces (UART, SPI, I2C or other custom buses)
In short: use it to replace multiple small TTL gates with compact, programmable logic for simple digital control.

QFP (Quad Flat Package) surface-mount package.