Lot of 10 Zilog Z0844204PSC Z80 SIO/2 Serial I/O Controller NOS 9425 Date Code for Sale

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Lot of 10 Zilog Z0844204PSC Z80 SIO/2 Serial I/O Controller NOS 9425 Date Code For Sale

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Lot of 10 Zilog Z0844204PSC Z80 SIO/2 Serial I/O Controller NOS 9425 Date Code:
$34.50

Product Overview

Up for sale are New Old Stock (NOS) Zilog Z0844204PSC Z80 SIO/2 (Serial Input/Output) controllers, sold in convenient factory tubes of 10 integrated circuits per tube.

Note on Quantity: This listing is priced per tube (10 chips). You can select exactly how many tubes you need from the quantity dropdown menu before checkout. The main gallery photo shows all 6 available tubes together to demonstrate initial inventory.

All chips feature matching 9425 date codes (manufactured the 25th week of 1994) and are in pristine, un-networked condition with straight, clean pins. Perfect for vintage computer restoration, legacy industrial maintenance, or retro-computing DIY projects (such as RC2014 or custom Z80 builds).

Technical Specifications

Part Number: Z0844204PSC (Z80 SIO/2)
Function: Dual-Channel Serial Input/Output Controller
Package Type: 40-Pin Plastic DIP (PDIP)
Speed: 4 MHz
Date Code: 9425 (Week 25, 1994)
Lot Configuration: Sold per tube (10 units per tube / Up to 6 tubes available)

Key Features & Architecture

The Z80 SIO/2 is a versatile, dual-channel data communication interface that supports asynchronous, monosync, bisync, and SDLC/HDLC protocols.

Two Independent Full-Duplex Channels: Allows simultaneous handling of data routing on both serial lines.
SIO/2 Pinout Configuration: This specific variation routes the modem control signals to support independent transmit and receive clocks on Channel B, making it highly compatible with standard retro-computer serial terminal interfaces.
Flexible Baud Rate Generation: Easily pairs with external clock oscillators to handle a wide range of standard communication speeds.

Condition & Packaging

Condition: New Old Stock (NOS). Excellent physical condition with zero pin deformation or corrosion.
Packaging: Each order of 10 chips is packaged and shipped inside its protective anti-static IC storage tube to eliminate electrostatic discharge (ESD) risks and prevent pins from bending during transit. Multiple tube orders will be combined securely and boxed together with ample padding.