Product Overview
Mitsubishi M74LS221P Dual One-Shot Multivibrator Logic IC DIP-16
Condition
Used equipment pull. Top markings read M74LS221P with Mitsubishi three-diamond logo and lot code 84A5C1. Evaluation: Visual inspection only. Function testing not performed.
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Product Overview
The Mitsubishi M74LS221P is a Low-Power Schottky TTL (LSTTL) dual monostable multivibrator integrated circuit in a standard 16-pin dual in-line plastic package (DIP-16). Designed with Schmitt-trigger inputs on the B-trigger lines, it delivers stable pulse generation and timing control for digital systems, repair work, and legacy computer maintenance.
Key Features
- Dual independent monostable multivibrator circuits in a single DIP-16 package
- Low-Power Schottky TTL (LSTTL) technology
- Schmitt-trigger B-inputs for enhanced noise immunity and jitter-free triggering
- Nominal operating supply voltage (VCC) of 5.0 V
- Through-hole mounting dual in-line package configuration
Applications
- Timing pulse generation and pulse width extension in legacy computing boards
- Digital clock gating and delay generation circuits
- Noise-resistant signal conditioning on vintage arcade and industrial control systems
- Breadboard prototyping and digital logic repair projects
Frequently Asked Questions
What logic family does this multivibrator belong to?
The M74LS221P is part of the standard 74LS Low-Power Schottky TTL logic family, operating nominally at 5.0 V.
Are pinout and function compatible with other 74LS221 variants?
Yes. The M74LS221P shares the standard dual monostable multivibrator pinout and functional logic of industry-standard 74LS221 series ICs such as SN74LS221N and DM74LS221N.
Why buy this specific pulled IC?
Finding original Japanese-manufactured LSTTL logic from Mitsubishi can be difficult when repairing period-correct boards. This individually handled pull provides an authentic replacement without needing to buy unverified bulk lots. Shipping is $8 flat rate, free once your order reaches $28, and ships same or next business day from our Idaho warehouse.
Keep your classic logic boards running with the original silicon that powered them.
