Microchip Technology AT22LV10-25SI

Overview

AT22LV10-25SI from Atmel is a low-voltage UV-erasable programmable logic device (PLD) based on the 22V10 architecture, featuring 10 inputs, 10 I/O pins, and 2 dedicated logic inputs (CLK/IN + IN), with 20 ns propagation delay at 3.0 V and industrial temperature range support (–40°C to +85°C) in SOIC-24 package.

For engineers reviewing the AT22LV10-25SI datasheet, AT22LV10-25SI pinout, AT22LV10-25SI application, or AT22LV10-25SI equivalent, key selection considerations include its 3.0–5.5 V supply compatibility, ±10 µA input/output leakage, reprogrammability via UV erasure, CMOS/TTL I/O compatibility, and use in legacy PLD-based state machine control and glue logic replacement.

Technical Context

The AT22LV10-25SI implements a fixed 22V10-compatible macrocell structure with 10 registers, each allocated 8–16 product terms for combinatorial or registered logic synthesis. It supports synchronous preset and asynchronous reset using two global product terms shared across all registers, and includes power-up reset that clears all registers to low state upon VCC crossing ~2.5 V.

Its timing behavior is defined by AC parameters including tPD = 25 ns (max), tCO = 17 ns (max), tS = 12 ns (max), and FMAX = 34.5 MHz (external feedback mode), all guaranteed over full 3.0–5.5 V supply and –40°C to +85°C operating range - with no derating required for industrial use when ordered as "I" grade.

Key Specifications

Pinout & Package

AT22LV10-25SI is supplied in a 24-lead plastic gull-wing small outline (SOIC) package per JEDEC MS-011 AB, 0.300" wide, with pin 1 marked by notch or bevel. Pin functions are identical to DIP and PLCC variants of the same speed/temp grade.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT22LV10-25SI, the AT22LV10-25JI offers identical logic functionality in PDIP for hand-soldered development, while the AT22LV10L-25SI trades higher drive strength for sub-mA active current - making the -25SI optimal for industrial-grade speed/power balance in surface-mount production.

Availability

AT22LV10-25SI is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy system glue logic replacement, and battery-powered data logger control requiring stable component supply across extended lifecycle programs.

Supply support for AT22LV10-25SI 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and programmable logic devices for embedded and industrial applications.

The AT22LV10 family was designed as a low-voltage, UV-erasable successor to the industry-standard 22V10 PLD, targeting cost-sensitive, medium-complexity logic replacement in industrial and portable systems.

FAQ

What is the maximum propagation delay specification for AT22LV10-25SI?

The AT22LV10-25SI has a maximum propagation delay (tPD) of 25 ns when measured from input or feedback to non-registered output at VCC = 3.0 V and TA = +85°C. This value is guaranteed across the full industrial temperature range and supply voltage window (3.0–5.5 V), and appears in the AC Characteristics table on page 4 of the official Atmel datasheet revision 0190E.

Does AT22LV10-25SI support both 3.3 V and 5 V logic interfaces?

Yes, AT22LV10-25SI supports CMOS and TTL compatible inputs and outputs across its full 3.0–5.5 V VCC range. Its VIH threshold scales with VCC (min 2.0 V, max VCC + 0.75 V), and VOL remains ≤0.5 V at 8 mA sink current - enabling direct interoperation with both 3.3 V and 5 V microcontrollers without level-shifting circuitry.

Is AT22LV10-25SI pin-compatible with standard 22V10 devices?

Yes, AT22LV10-25SI maintains identical pinout and logic architecture to the original 22V10, including 10 inputs, 10 I/Os, and CLK/IN pin placement in SOIC-24. Its JEDEC fuse map format is fully compatible, allowing reuse of existing PALASM or CUPL programming files without modification.

How is the AT22LV10-25SI erased and reprogrammed?

The AT22LV10-25SI is erased using ultraviolet light at 2537 Å wavelength for ≥20 minutes at 12,000 µW/cm² intensity. After erasure, it is reprogrammed using standard PAL programmers supporting JEDEC JED files. Pin 10 (SOIC) receives a 11.5–13 V pulse during register preload, but normal programming uses standard 5 V or 12.5 V VPP signals per JEDEC spec.

What is the power-up reset behavior of AT22LV10-25SI?

AT22LV10-25SI performs automatic power-up reset: all 10 registers are cleared to logic low when VCC crosses ~2.5 V during power ramp-up. This occurs asynchronously and is independent of clock or input states. The feature eliminates need for external RC reset circuits in state machine designs, provided VCC rise is monotonic and setup/hold timing is met before first clock edge.