Microchip Technology ATF750C-10JC

Overview

ATF750C-10JC from Atmel is a high-performance, electrically-erasable Complex Programmable Logic Device (CPLD) in a 28-pin PLCC package, featuring 20 D/T-type flip-flops, 171 product terms, 20 sum terms, and 7.5 ns pin-to-pin delay at 5V operation. It supports programmable pin-keeper circuits, individual flip-flop clocking (product-term or direct input), and asynchronous reset per register - enabling robust state machine implementation in industrial control and legacy logic replacement applications.

For engineers reviewing the ATF750C-10JC datasheet, ATF750C-10JC pinout, ATF750C-10JC application, or ATF750C-10JC equivalent, key selection criteria include its 28J PLCC package compatibility, -10 speed grade (10 ns tPD), industrial temperature range (-40°C to +85°C), and backward compatibility with ATV750B/BL and ATV750/L JEDEC files for drop-in migration paths.

Technical Context

The ATF750C-10JC implements a reprogrammable CMOS CPLD architecture derived from the 22V10, extended with dual-mode D/T flip-flops, independent feedback paths for all 20 registers, and configurable output enable per I/O. Its logic array delivers 42 inputs, two sum terms per output, and variable product-term allocation (4–8 per sum term).

It supports both product-term clocking and direct pin clocking (CLK/IN on Pin 1), enabling mixed-clock-domain designs. Power-up reset initializes all registers low, and synchronous preset plus per-register asynchronous reset ensure deterministic state initialization - critical for safety-critical sequencers and boot-time logic controllers.

Key Specifications

Pinout & Package

ATF750C-10JC uses a 28-lead Plastic J-Leaded Chip Carrier (PLCC, package code 28J) with standard JEDEC MS-018 AB outline, 1.27 mm lead pitch, and body size 12.4 mm × 12.4 mm. Pin 1 is marked by a corner notch; pins 1, 8, 15, and 22 may be left unconnected but yield best performance when VCC and GND are applied as specified.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CPLD-based logic replacement applications.

Compared with ATF750C-10PU and ATF750C-10SU, the ATF750C-10JC offers superior thermal dissipation and mechanical reliability in vibration-prone industrial enclosures due to its ceramic-based PLCC construction and four-point ground connection - making it optimal for mission-critical embedded control.

Availability

ATF750C-10JC is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, motor drive control sequencing, and legacy system logic replacement requiring stable component supply across extended product lifecycles.

Supply support for ATF750C-10JC 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 product line was designed to deliver high-density, reprogrammable logic in standard packages for seamless migration from bipolar PALs and earlier EEPROM-based PLDs - targeting cost-sensitive, long-lifecycle industrial control systems.

FAQ

What is the maximum operating frequency of the ATF750C-10JC under internal feedback conditions?

The ATF750C-10JC achieves up to 86 MHz maximum operating frequency with internal feedback (1/(tSF + tCF)), as specified in its AC characteristics table. This value reflects real-world performance with feedback paths routed internally through the logic array - critical for high-speed counters and pipeline stages implemented within the ATF750C-10JC itself.

Does the ATF750C-10JC support in-system programming without removing it from the PCB?

Yes, the ATF750C-10JC supports in-system programming via standard JEDEC-compatible programmers using its VPP pin (Pin 8 on DIP variants) and dedicated programming voltage (10.25–10.75 V). While the 28J PLCC package requires appropriate socket or pogo-pin fixture access, the device retains full reprogrammability after soldering - enabling field firmware updates and design iterations without board rework.

How does the pin-keeper feature function on the ATF750C-10JC, and can it be disabled?

The ATF750C-10JC's pin-keeper circuit maintains the last driven logic state (high or low) on any input or I/O pin when left floating - preventing noise-induced switching and eliminating external pull-up resistors. It is enabled or disabled via software compiler mode selection (e.g., V750CPPKLCC vs. V750LCC in Atmel WinCUPL); once disabled, external termination becomes mandatory for unused pins.

Is the ATF750C-10JC pin-compatible with the older ATV750B-10PC device?

Yes, the ATF750C-10JC is pin-compatible with the ATV750B-10PC in the same 28J PLCC package and supports cross-programming using ATV750B JEDEC files (V750B mode). This enables direct hardware replacement without layout changes, though the ATF750C-10JC adds T-type flip-flops and pin clocking - features inactive unless recompiled for the full ATF750C-10JC feature set.

What is the power supply current consumption of the ATF750C-10JC at 5V and 25°C with all outputs unloaded?

At 5V supply and 25°C ambient, the ATF750C-10JC draws 125–180 mA typical standby current (ICC), depending on commercial or industrial screening. This value assumes VCC = max, VIN = max, and outputs open - consistent with datasheet Table 12 (ICC for C-10 grade). Actual dynamic current scales with toggle rate and loaded outputs, as shown in Figure 15.