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Home > Products > Integrated Circuits (ICs) > Embedded > CPLDs (Complex Programmable Logic Devices)

Microchip Technology ATF750C-7PX

Name: ATF750C-7PX
Brand: Microchip Technology
SKU: ATF750C-7PX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ATF750C-7PX

Manufacturer:: Microchip Technology

Category:: CPLDs (Complex Programmable Logic Devices)

Package:: 24-DIP (0.300", 7.62mm)

Datasheet:: ATF750C-7PX.pdf

Description:: IC CPLD 10MC 7.5NS 24DIP

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Product details

Overview

ATF750C-7PX from Atmel is a high-speed, electrically-erasable Complex Programmable Logic Device (CPLD) in a 24-pin PDIP package, delivering 7.5 ns pin-to-pin delay at 5V operation, 20 D/T-type flip-flops, and 171 total product terms - enabling complex state machines and logic replacement in space-constrained industrial control systems.

For engineers reviewing the ATF750C-7PX datasheet, ATF750C-7PX pinout, ATF750C-7PX application, or ATF750C-7PX equivalent, this device serves as a speed- and density-upgraded replacement for ATV750B/BL and ATV750/L in legacy PLD designs requiring reprogrammability, pin-keeper I/O, and mixed clocking (product-term or direct-pin).

Technical Context

The ATF750C-7PX implements a 22-input, 20-output CPLD architecture with fully programmable combinatorial logic array and register bank. It supports dual clocking modes: individual product-term clocks per flip-flop or direct input-pin clocking (Pin 1), enabling coexistence of asynchronous counters and synchronous state machines.

Each of its 20 flip-flops is independently configurable as D- or T-type, with dedicated asynchronous reset, synchronous preset, and feedback paths into the logic array. All 10 I/O pins feature programmable pin-keeper circuits to eliminate floating inputs and external pull-ups.

Key Specifications

Parameter	Value and Actual Design Meaning
Propagation Delay (t_PD)	7.5 ns max - enables 95 MHz external-feedback operation in high-speed control loops.
Logic Density	171 product terms, 20 sum terms, 20 flip-flops - replaces >2x gates vs. standard 24-pin PLDs.
Supply Voltage	5V ±5% - compatible with legacy TTL/CMOS 5V systems without level-shifting.
Operating Temperature	-40°C to +85°C - qualified for industrial environments including motor drives and PLC I/O modules.
Power Supply Current (I_CC)	125–180 mA standby - supports stable operation under full logic utilization at 25°C.
ESD Protection	2000V HBM - ensures robustness during board handling and in-field maintenance.
Data Retention	20 years - guarantees nonvolatile configuration integrity across equipment lifecycle.

Pinout & Package

ATF750C-7PX is housed in a 24-lead, 0.300" wide Plastic Dual Inline Package (PDIP), designated 24P3 per Atmel's packaging specification. Pin 1 is CLK/IN; pins 2–12 and 24 are IN; pins 13–23 are I/O; pin 14 is GND; pin 24 is VCC.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	CLK/IN	Configurable as global clock input or general-purpose logic input; supports direct-pin clocking mode.
Pins 2–12, 24	IN	Dedicated logic inputs; all 22 pins usable as array inputs - no shared I/O overhead.
Pins 13–23	I/O	Bi-directional buffers with programmable pin-keeper; 10 pins support I/O/bidirectional use.
Pin 14	GND	Ground reference for logic and power domains; decoupling required within 10 mm.
Pin 24	VCC	+5V supply; requires local 0.1 µF ceramic bypass capacitor adjacent to pin.

Key Features

Feature	Design Value
Programmable D/T Flip-flops	20 individually configurable registers - enables JK/SR synthesis and mixed-edge timing without external logic.
Pin-keeper Circuits	On-chip weak pull-up/pull-down on all I/O and IN pins - eliminates external resistors and reduces BOM count.
Dual Clocking Architecture	Per-flip-flop selection between product-term or direct-pin clock - allows independent clock domains in one device.
Asynchronous Reset & Synchronous Preset	20 dedicated async resets + 1 global sync preset - ensures deterministic power-up and test-mode initialization.
Reprogrammability	1000 erase/write cycles with 20-year data retention - supports field firmware updates and design iteration.

Applications

Industrial PLC I/O Expansion	Legacy System Logic Replacement
Use Scenario: Adding isolated digital input/output channels to modular PLC backplanes using existing 5V bus and footprint constraints. IC Role / Device Role / Timing Role: Configurable glue logic implementing debounce, edge detection, and protocol translation between sensor interface and microcontroller. Use Value: Replaces discrete 74-series logic and PALs with single-device solution, reducing PCB area by 65% and eliminating inter-stage propagation skew.	Use Scenario: Upgrading aging telecom line cards originally designed with ATV750B, where board real estate and 5V compatibility are fixed. IC Role / Device Role / Timing Role: Drop-in functional and pin-compatible CPLD providing faster t_PD (7.5 ns vs. 10 ns) and added T-type registers for counter optimization. Use Value: Enables higher throughput in channel aggregation logic without layout changes or voltage rail modifications.
Motor Control State Machine	Test Equipment Pattern Generator
Use Scenario: Implementing commutation sequencing and fault-handling logic in brushless DC motor drivers operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Registered output CPLD managing six-step switching states, overcurrent latching, and PWM synchronization. Use Value: Leverages 20 flip-flops and internal feedback to embed full state machine with zero external timing components.	Use Scenario: Generating synchronized stimulus waveforms for IC validation benches requiring precise setup/hold timing and multi-channel enable control. IC Role / Device Role / Timing Role: High-reliability pattern generator with programmable pin-keeper holding test vectors during idle phases. Use Value: Achieves sub-10 ns timing resolution and eliminates floating-bus noise during vector transitions via on-chip keepers.

Industrial PLC I/O Expansion

Legacy System Logic Replacement

Use Scenario: Adding isolated digital input/output channels to modular PLC backplanes using existing 5V bus and footprint constraints.

IC Role / Device Role / Timing Role: Configurable glue logic implementing debounce, edge detection, and protocol translation between sensor interface and microcontroller.

Use Value: Replaces discrete 74-series logic and PALs with single-device solution, reducing PCB area by 65% and eliminating inter-stage propagation skew.

Use Scenario: Upgrading aging telecom line cards originally designed with ATV750B, where board real estate and 5V compatibility are fixed.

IC Role / Device Role / Timing Role: Drop-in functional and pin-compatible CPLD providing faster t_PD (7.5 ns vs. 10 ns) and added T-type registers for counter optimization.

Use Value: Enables higher throughput in channel aggregation logic without layout changes or voltage rail modifications.

Motor Control State Machine

Test Equipment Pattern Generator

Use Scenario: Implementing commutation sequencing and fault-handling logic in brushless DC motor drivers operating across -40°C to +85°C.

IC Role / Device Role / Timing Role: Registered output CPLD managing six-step switching states, overcurrent latching, and PWM synchronization.

Use Value: Leverages 20 flip-flops and internal feedback to embed full state machine with zero external timing components.

Use Scenario: Generating synchronized stimulus waveforms for IC validation benches requiring precise setup/hold timing and multi-channel enable control.

IC Role / Device Role / Timing Role: High-reliability pattern generator with programmable pin-keeper holding test vectors during idle phases.

Use Value: Achieves sub-10 ns timing resolution and eliminates floating-bus noise during vector transitions via on-chip keepers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ATF750C-10PU	10 ns t_PD, same 24P3 package, industrial temp range (-40°C to +85°C)	Lower maximum frequency (71 MHz vs. 95 MHz); suitable where timing margin exists	Select when extended temperature operation is required and 7.5 ns delay is not critical.
ATF750CL-15PU	Low-power "L" variant, 15 ns t_PD, 1 mA standby current (vs. 125+ mA)	Higher propagation delay; optimized for battery-powered or thermally constrained systems	Choose for portable test gear or energy-sensitive applications where speed trade-off is acceptable.

Compared with ATF750C-10PU and ATF750CL-15PU, the ATF750C-7PX delivers the fastest timing (7.5 ns), commercial-temperature operation, and highest logic density in PDIP - making it optimal for performance-critical industrial upgrades where board space and 5V compatibility are fixed.

Availability

ATF750C-7PX is available at Aetrix Electronics and suitable for industrial control, legacy system modernization, and motor drive applications requiring stable component supply, long-lifecycle support, and RoHS-compliant green packaging.

Supply support for ATF750C-7PX 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 markets.

The ATF750C family was designed as a high-density, reprogrammable CPLD solution targeting 5V system upgrades, offering superset compatibility with 22V10 and ATV750 while adding T-type registers, pin-keeper I/O, and flexible clocking.

FAQ

What is the maximum operating frequency of the ATF750C-7PX?

The ATF750C-7PX supports up to 95 MHz external-feedback operation (f_MAX = 1/(t_SS + t_COS)), verified at 5V ±5% and 25°C. Its 7.5 ns pin-to-pin delay enables tight timing closure in high-speed control logic. The actual achievable frequency depends on design topology, feedback path routing, and load conditions - ATF750C-7PX must be constrained using vendor-supported timing analysis tools.

Is the ATF750C-7PX pin-compatible with the ATV750B?

Yes, the ATF750C-7PX is a direct replacement for the ATV750B/BL in 24-pin PDIP packages. It maintains identical pinout, voltage levels, and JEDEC file compatibility in V750B cross-programming mode. ATF750C-7PX adds enhanced features (T-type registers, pin-keeper, dual clocking) without requiring PCB changes - legacy ATV750B designs can be upgraded in-place.

Does the ATF750C-7PX support in-system programming?

No, the ATF750C-7PX requires external parallel programming via standard JEDEC file loaders (e.g., Atmel-ICE, third-party programmers supporting V750 format). It does not support ISP or JTAG-based in-circuit reprogramming. Programming occurs before soldering or through socketed programming stations - ATF750C-7PX must be programmed offline and then placed on the target board.

What is the purpose of the pin-keeper circuit in the ATF750C-7PX?

The pin-keeper circuit in the ATF750C-7PX actively holds unused I/O and input pins at their last driven logic state (high or low), preventing floating nodes that cause shoot-through current and EMI. Enabled via software compiler selection (e.g., V750CPPK), it eliminates need for external pull-up/down resistors - reducing power consumption, board area, and signal integrity risk in ATF750C-7PX-based designs.

Can the ATF750C-7PX operate at 3.3V?

No, the ATF750C-7PX is specified only for 5V ±5% operation. Its absolute maximum ratings and AC/DC characteristics (e.g., V_IL/V_IH, t_PD, I_OL/I_OH) are validated exclusively at 5V. Attempting 3.3V operation results in undefined logic behavior, timing violations, and potential damage due to insufficient gate overdrive - ATF750C-7PX must be used in 5V systems only.

ATF750C-7PX Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: ATF750C(L)

Package/Case:: 24-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Active

Programmable:: Verified

Programmable Type:: EE PLD

Delay Time tpd(1) Max:: 7.5 ns

Voltage Supply - Internal:: 4.75V ~ 5.25V

Number of Logic Elements/Blocks:: -

Number of Macrocells:: 10

Number of Gates:: -

Number of I/O:: 10

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 24-PDIP

ATF750C-7PX FAQ

1.How can I place an order for ATF750C-7PX through Aetrix?

Please submit a Request for Quotation (RFQ) for ATF750C-7PX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ATF750C-7PX reliable?

The price and inventory of ATF750C-7PX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATF750C-7PX is usually 5 days.

3.What payment methods are accepted for ATF750C-7PX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATF750C-7PX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ATF750C-7PX?

ATF750C-7PX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ATF750C-7PX order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ATF750C-7PX?

For technical support, including ATF750C-7PX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATF750C-7PX requirements.

6.How does Aetrix verify that ATF750C-7PX is sourced from the original manufacturer or authorized distributors?

All ATF750C-7PX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ATF750C-7PX meets industry standards.

7.What is the process for return or replacement of ATF750C-7PX?

All ATF750C-7PX units undergo pre-shipment inspection (PSI). If there is an issue with ATF750C-7PX, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ATF750C-7PX part is unused and in its original packaging.

Return procedure for ATF750C-7PX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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