Microchip Technology ATF750C-10JI

Overview

ATF750C-10JI from Atmel is a high-speed, 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 product-term or input-pin clocking per flip-flop, and operates across industrial temperature range (–40°C to +85°C). It replaces ATV750B/BL and ATV750/L in logic-intensive embedded control applications.

For engineers reviewing the ATF750C-10JI datasheet, ATF750C-10JI pinout, ATF750C-10JI application, or ATF750C-10JI equivalent, this page delivers verified electrical specs, validated PLCC pin mapping, confirmed industrial-grade timing behavior, and two functionally aligned alternative CPLDs with documented architectural differences.

Technical Context

The ATF750C-10JI implements a reprogrammable CMOS PLD architecture derived from the 22V10 but extended with dual flip-flop per output cell (20 total), independent feedback paths for all registers, and selectable D- or T-type configuration per flip-flop. Its 171 product terms feed 20 sum terms, each configurable with 4–8 product terms, enabling complex state machines with buried logic.

It supports two clocking modes: product-term–driven (tCO = 4 ns min) and direct input-pin clocking (tCOS = 0 ns min), with asynchronous reset per flip-flop and synchronous preset for all 20 registers. Power-up reset ensures deterministic low-state initialization of all registers, critical for reliable state machine boot.

Key Specifications

Pinout & Package

ATF750C-10JI is housed in a 28-lead Plastic J-Leaded Chip Carrier (PLCC, package code 28J), compliant with JEDEC MS-018 Variation AB. Dimensions: 12.4 mm × 12.4 mm body, 1.27 mm lead pitch, 3.05 mm max height. Pin 1 identifier is a corner notch; pins 1, 8, 15, and 22 are VCC/GND-recommended connection per datasheet for optimal noise immunity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ATF750C-10PU and ATF750CL-15JU, the ATF750C-10JI uniquely balances industrial temperature operation, surface-mount PLCC packaging, and 7.5 ns performance - making it the only option supporting high-speed, reprogrammable logic in space-constrained industrial controllers without thermal derating.

Availability

ATF750C-10JI is available at Aetrix Electronics and suitable for industrial motor control, legacy system emulation, programmable I/O expansion, and test equipment sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ATF750C-10JI 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 with emphasis on industrial and automotive reliability.

The ATF750C product line delivers high-density, reprogrammable CPLDs targeting replacement of obsolete 22V10-based designs and consolidation of discrete logic in industrial control, instrumentation, and communications infrastructure.

FAQ

What is the maximum operating frequency of the ATF750C-10JI when using external feedback?

The ATF750C-10JI achieves a maximum operating frequency of 83 MHz under external feedback conditions (1/(tSS + tCOS)), as specified in the AC Characteristics table for the -10 speed grade. This value is measured at VCC = 5V ±5% and TA = 25°C, and remains valid across the full industrial temperature range (–40°C to +85°C) with appropriate derating. The ATF750C-10JI's 7 ns minimum clock period enables deterministic timing in high-speed control loops without additional synchronization logic.

Does the ATF750C-10JI support in-system programming?

Yes, the ATF750C-10JI supports in-system programming via standard JEDEC file loading using compatible programmers such as Data I/O PS-29, BP Microsystems Series, or third-party tools listed in Atmel Application Note 776L. It requires only VCC, GND, and the programming interface signals (DATA, OE, CLK) - no high-voltage VPP supply. All 14,504 fuses, including User Row (UES) and pin-keeper bits, are fully accessible during ISP, and the security fuse prevents unauthorized readback after programming.

How does the pin-keeper feature function on the ATF750C-10JI I/O pins?

The ATF750C-10JI implements programmable pin-keeper circuits on all 22 logic pins, which actively hold the last driven logic state (high or low) when the pin becomes floating. This eliminates metastability and dynamic power consumption caused by floating inputs, removing the need for external pull-up/pull-down resistors. Pin-keeper is enabled or disabled via software compiler selection (e.g., V750CPPKLCC in Atmel WinCUPL); once disabled, external termination must be applied per standard CMOS practice.

Can the ATF750C-10JI replace an ATV750B-10PC directly on the same PCB?

No - the ATF750C-10JI (28J PLCC) is not pin-compatible with the ATV750B-10PC (24P3 PDIP). However, the ATF750C-10PU (24P3 PDIP) is a direct drop-in replacement with identical pinout, JEDEC file compatibility, and enhanced features. For migration to ATF750C-10JI, PCB layout revision is required to accommodate the 28-pin PLCC footprint, though logic design and JEDEC files remain fully reusable without modification.

What is the power-up reset behavior of the ATF750C-10JI registers?

Upon power application, the ATF750C-10JI asserts an internal power-up reset signal when VCC crosses VRST (2.0–4.5 V), forcing all 20 flip-flops to a deterministic low state within 600–1000 ns (tPR). This occurs asynchronously relative to the clock, so input setup/hold times must be met before first clock edge. The reset ensures repeatable state machine initialization without external POR circuitry - a key reliability feature for industrial control applications where uncontrolled startup states could cause hazardous conditions.