Microchip Technology ATF16V8CZ-15XC

Overview

ATF16V8CZ-15XC from Microchip Technology (formerly Atmel) is a high-speed, electrically-erasable CMOS programmable logic device (PLD) with 12 ns pin-to-pin delay, 5 µA typical standby current, and Flash-based reprogrammability. It implements a universal 20-pin PAL architecture supporting registered, complex, and simple modes - enabling direct replacement of 16R8, 16L8, and 10L8 families in legacy digital control logic.

For engineers reviewing the ATF16V8CZ-15XC datasheet, ATF16V8CZ-15XC pinout, ATF16V8CZ-15XC application, or ATF16V8CZ-15XC equivalent, this device serves as a drop-in upgrade path for obsolete PALs in industrial control, instrumentation, and telecom interface logic where low-power operation, PCI compliance, and RoHS-compliant TSSOP packaging are required.

Technical Context

The ATF16V8CZ-15XC uses Flash-based EECMOS technology to deliver 100 erase/write cycles, 20-year data retention, and 2,000V ESD protection. Its architecture supports three software-configurable modes - registered (CLK/OE fixed on pins 1/11), complex (combinatorial I/O with product-term OE), and simple (dedicated combinatorial outputs) - each allocating eight product terms per macrocell.

It features internal pin-keeper circuits eliminating external pull-ups, automatic power-down below 5 µA when inputs are static, and JEDEC-compatible programming with preload support. Timing is specified at 5V ±5% over 0°C–70°C, with tPD = 15 ns max, tCO = 10 ns max, and fMAX = 45 MHz (external feedback).

Key Specifications

Pinout & Package

ATF16V8CZ-15XC is packaged in a 20-lead Thin Shrink Small Outline Package (TSSOP-20, package code 20X), measuring 6.5 mm × 4.4 mm × 1.2 mm, with 0.65 mm pitch gull-wing leads and JEDEC MO-153 AC compliance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ATF16V8CZ-15XC, the PDIP and SOIC variants offer identical logic performance but differ in mechanical fit, thermal dissipation, and assembly process compatibility - the TSSOP version delivers smallest footprint and best suitability for high-volume SMT production.

Availability

ATF16V8CZ-15XC is available at Aetrix Electronics and suitable for industrial control logic, legacy system replacement, and telecom interface applications requiring stable component supply, RoHS compliance, and long-lifecycle support.

Supply support for ATF16V8CZ-15XC 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

Microchip Technology acquired Atmel in 2016 and maintains its legacy PLD portfolio, emphasizing reliability, longevity, and backward compatibility for industrial and aerospace customers.

The ATF16V8CZ series was designed to extend the service life of 20-pin PAL-based systems with Flash reprogrammability, low-power operation, and drop-in pin compatibility - targeting cost-sensitive, long-lifecycle embedded upgrades.

FAQ

What is the maximum operating frequency of the ATF16V8CZ-15XC?

The ATF16V8CZ-15XC supports a maximum external feedback clock frequency of 45 MHz, derived from its 15 ns propagation delay and timing parameters (tS = 12 ns, tCO = 10 ns). This value is guaranteed across the full commercial temperature range (0°C to +70°C) at 5V ±5%, making it suitable for moderate-speed control logic without requiring custom timing closure.

Does the ATF16V8CZ-15XC require external pull-up resistors on its I/O pins?

No, the ATF16V8CZ-15XC includes internal pin-keeper circuits on all I/O and input pins, which maintain the last valid logic state without DC current draw. This eliminates the need for external pull-up resistors, reducing BOM cost and board space while preventing floating-input-induced power consumption or metastability in un-driven states.

Can the ATF16V8CZ-15XC replace a PAL16L8 in an existing design?

Yes, the ATF16V8CZ-15XC operates in Complex Mode to emulate PAL16L8 functionality, with identical pinout, voltage levels, and timing behavior. Its 15 ns tPD matches PAL16L8-15 specifications, and it accepts standard JEDEC files - enabling direct substitution without PCB or firmware changes in most cases.

What programming tools are compatible with the ATF16V8CZ-15XC?

The ATF16V8CZ-15XC is supported by industry-standard PLD development tools including Atmel-ABEL, CUPL, LOG/iC, OrCAD-PLD, and PLDesigner. These compilers automatically select Registered, Complex, or Simple mode based on logic usage and generate JEDEC files compatible with programmers from Data I/O, BP Microsystems, and Xeltek - all verified for ATF16V8CZ-15XC.

Is the ATF16V8CZ-15XC RoHS compliant?

Yes, the ATF16V8CZ-15XC is manufactured in a green (Pb/halide-free) TSSOP-20 package compliant with RoHS Directive 2011/65/EU. This is confirmed in Atmel's 0453H datasheet revision and reflected in the "U" suffix alternatives (e.g., ATF16V8CZ-15XU), though the -15XC itself meets the same environmental specification per Microchip's legacy product documentation.