Microchip Technology ATF22LV10CZ-25SC

Overview

ATF22LV10CZ-25SC from Atmel is a low-voltage, electrically erasable programmable logic device (PLD) with 12 inputs, 10 I/O macrocells, 25ns propagation delay, 25µA maximum standby current, and 3.0V–5.5V supply operation - deployed in battery-powered industrial control logic and legacy PAL replacement applications.

For engineers reviewing the ATF22LV10CZ-25SC datasheet, ATF22LV10CZ-25SC pinout, ATF22LV10CZ-25SC application, or ATF22LV10CZ-25SC equivalent, key selection considerations include input transition detection (ITD)-enabled zero-power idle mode, 5V-tolerant CMOS/TTL-compatible I/Os, registered/combinatorial output configurability, and PLCC/SOIC/TSSOP package compatibility for retrofit designs.

Technical Context

The ATF22LV10CZ-25SC implements a variable product-term architecture with 8–16 product terms per output plus two global synchronous/asynchronous reset terms. Its Input Transition Detection (ITD) circuitry enables automatic entry into zero-power standby when inputs are static, eliminating external power management logic.

Each of its 10 macrocells supports active-high/low and registered/combinatorial output modes, enabling emulation of most 24-pin PAL devices. Register preload and a security fuse support secure, testable state-machine initialization without external boot ROM.

Key Specifications

Pinout & Package

ATF22LV10CZ-25SC is supplied in a 24-lead, 0.300" wide plastic gull-wing small outline (SOIC) package (24S), compliant with JEDEC MS-012AB, with 1.27 mm pitch and 7.4–7.6 mm body width.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ATF22LV10CZ-25SC, the ATF22LV10CQZ-30SC reduces active current by >40% but trades 5 ns speed; the AM22V10CPC matches speed but lacks voltage flexibility and zero-power capability - making ATF22LV10CZ-25SC optimal for battery-critical, mixed-voltage industrial retrofits.

Availability

ATF22LV10CZ-25SC is available at Aetrix Electronics and suitable for industrial sensor interfaces, portable medical device logic, legacy system retrofits, and automated test equipment requiring stable component supply across extended product lifecycles.

Supply support for ATF22LV10CZ-25SC 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 was a U.S.-based semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and programmable logic, acquired by Microchip Technology in 2016.

The ATF22LV10CZ series was designed as a low-voltage, flash-based replacement for bipolar PAL devices, targeting power-sensitive industrial and portable electronics where reprogrammability and long-term data retention were essential.

FAQ

What is the maximum operating frequency supported by the ATF22LV10CZ-25SC?

The ATF22LV10CZ-25SC supports a maximum clock frequency of 33.3 MHz under external feedback conditions (1/(tS + tCO)), verified across its full 3.0V–5.5V supply and -40°C to +85°C temperature range. This is derived from its guaranteed 25 ns propagation delay and 15 ns setup time, making it suitable for high-speed control logic in industrial PLC modules and test instrumentation where deterministic timing is required. The ATF22LV10CZ-25SC maintains this performance without speed de-rating at industrial temperatures.

Does the ATF22LV10CZ-25SC require an external power-down controller?

No, the ATF22LV10CZ-25SC does not require an external power-down controller. Its patented Input Transition Detection (ITD) circuitry automatically places the device into zero-power standby mode (≤25 µA) whenever inputs remain static, eliminating quiescent current without software or hardware intervention. This feature is intrinsic to the ATF22LV10CZ-25SC silicon design and functions independently of host processor activity, making it ideal for energy-harvesting and battery-backed applications where continuous monitoring must coexist with ultra-low power consumption.

Can the ATF22LV10CZ-25SC be used in 5V systems despite its low-voltage rating?

Yes, the ATF22LV10CZ-25SC is fully compatible with 5V systems: its absolute maximum input voltage is +7.0V, all inputs are explicitly rated as 5V tolerant, and it operates reliably across a 3.0V–5.5V supply range. This dual-voltage capability allows direct interfacing with legacy 5V TTL logic families while retaining low-power advantages in mixed-voltage designs - a key differentiator from strictly 3.3V-only PLDs. The ATF22LV10CZ-25SC's VIH specification (≥2.0V) and VIL (≤0.8V) ensure robust noise margins in both 3.3V and 5V signaling environments.

How does the security fuse on the ATF22LV10CZ-25SC protect intellectual property?

The security fuse on the ATF22LV10CZ-25SC permanently disables fuse pattern readback and preload verification once programmed, preventing unauthorized copying of the configured logic array. Crucially, this protection applies only to the main 22V10 logic configuration - the 64-bit User Signature memory remains fully accessible even after fuse programming, allowing storage of calibration data or traceability codes. This architecture enables secure deployment of proprietary glue logic in medical and industrial equipment while preserving field-serviceability for non-logic data. The ATF22LV10CZ-25SC security mechanism is implemented in hardware and cannot be bypassed via standard programming protocols.

Is the ATF22LV10CZ-25SC still recommended for new designs?

No, the ATF22LV10CZ-25SC is Not Recommended for New Designs (NRND), as stated in Atmel document 0779M–PLD–7/10. It has been superseded by the ATF22LV10CQZ-30SC, which offers lower active current (18–50 mA vs. 50–90 mA), improved thermal performance, and green RoHS-compliant packaging. However, the ATF22LV10CZ-25SC remains actively supported for legacy design refreshes, repair, and obsolescence mitigation where exact timing, power, and footprint compatibility are mandatory - particularly in aerospace, medical, and industrial systems with long certification cycles.