Microchip Technology ATF750C-15JC

Overview

ATF750C-15JC from Atmel is a high-performance, electrically-erasable Complex Programmable Logic Device (CPLD) in a 28-pin PLCC package, delivering 15 ns maximum pin-to-pin delay at 5V operation, 20 D/T-type flip-flops, and 171 total product terms - enabling implementation of complex state machines and logic replacement in space-constrained industrial control systems.

For engineers reviewing the ATF750C-15JC datasheet, ATF750C-15JC pinout, ATF750C-15JC application, or ATF750C-15JC equivalent, this device serves as a speed- and feature-upgraded replacement for ATV750B/L and ATV750/L in legacy PLD designs requiring reprogrammability, pin-keeper I/Os, and mixed clocking (product-term or direct-pin), especially where industrial temperature range (-40°C to +85°C) and RoHS-compliant green packaging are required.

Technical Context

The ATF750C-15JC implements a 22-input × 20-output CPLD architecture with 42 array inputs, 20 sum terms, and fully independent feedback paths per flip-flop. Its logic array supports both combinatorial and registered outputs, with individual asynchronous reset and synchronous preset lines across all 20 registers.

It features dual clocking modes: product-term-controlled clocks (with dedicated clock product terms per flip-flop) and direct input-pin clocking (via Pin 1/CLK), enabling heterogeneous timing domains within one device. All 10 I/O pins support programmable pin-keeper circuits to eliminate floating inputs and external pull-ups.

Key Specifications

Pinout & Package

ATF750C-15JC is housed in a 28-lead Plastic J-Leaded Chip Carrier (PLCC) package (JEDEC MS-018 AB), with 1.27 mm pitch, 12.32 mm × 12.32 mm body, and lead coplanarity ≤0.102 mm. Pin 1 is marked by a corner notch; pins 1, 8, 15, and 22 may be left unconnected but yield superior performance when tied to VCC (pin 1) and GND (pins 8, 15, 22).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable logic applications.

Compared with ATF750C-10JU, the ATF750C-15JC trades 5 ns of speed for lower cost and relaxed timing margin requirements; compared with ATF750CL-15JU, it sacrifices ultra-low standby current for stronger output drive (±40 mA vs ±1 mA) and wider VCC operating tolerance (±5% vs ±10%).

Availability

ATF750C-15JC is available at Aetrix Electronics and suitable for industrial motor control interface, legacy system glue logic replacement, programmable power sequencing controller, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ATF750C-15JC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and programmable logic devices for industrial, automotive, and consumer applications.

The ATF750C family was designed as a high-density, reprogrammable CPLD solution targeting industrial control, instrumentation, and legacy system upgrades - emphasizing pin compatibility with 22V10, EEPROM-based field updates, and robust operation across -40°C to +85°C.

FAQ

What is the operating voltage range for ATF750C-15JC?

The ATF750C-15JC operates at 5V ±5%, with absolute maximum ratings of -0.6V to +7.0V on any pin. It is not rated for 3.3V operation; using 5V supplies ensures full compliance with VIH/VIL thresholds, output drive capability (IOH = -4 mA, IOL = 16 mA), and AC timing specifications including the 15 ns tPD guarantee. Deviation outside 4.75–5.25V invalidates published AC characteristics.

Is ATF750C-15JC pin-compatible with ATV750/L devices?

Yes, the ATF750C-15JC is a direct replacement for ATV750/L in the same PLCC-28 package (28J), maintaining identical pin functions and JEDEC file compatibility when compiled in ATV750 mode. However, full utilization of its advanced features - such as T-type flip-flops, pin-clocking, and pin-keeper - requires recompilation using Atmel WinCUPL targeting the ATF750C device model, not the legacy ATV750 subset.

Does ATF750C-15JC support in-system programming?

Yes, the ATF750C-15JC supports in-system programming via standard JEDEC file loading using compatible programmers (e.g., third-party units supporting V750 cross-programming mode). Its electrically-erasable EEPROM architecture allows full reconfiguration without removal from the PCB, provided VPP programming voltage (10.25–10.75V) and proper timing constraints (tAW ≥15 ns) are met during the programming cycle.

What is the purpose of the pin-keeper circuit in ATF750C-15JC?

The pin-keeper circuit in ATF750C-15JC actively holds unused I/O pins at their last driven logic state (high or low), preventing floating inputs that cause shoot-through current and EMI. Enabled per-pin in the fuse map, it eliminates external pull-up/pull-down resistors - reducing BOM count, board area, and static power consumption. It does not affect signal integrity during active driving.

How many product terms does ATF750C-15JC provide per output?

The ATF750C-15JC allocates two sum terms per output, with a variable format assigning four to eight product terms per sum term - yielding up to 171 total product terms across the device. This architecture allows deep logic equations per output (e.g., wide AND-OR expressions) while retaining flexibility for shared terms across multiple outputs, directly enabling complex combinational functions without external fanout.