Product Overview
Mitsubishi M74LS221P LSTTL Dual Monostable Multivibrator DIP-16
Condition
Used equipment pull. Markings legible: Mitsubishi logo, 84A5C1, M74LS221P. Evaluation: Visual inspection only. Function testing not performed.
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Product Overview
The Mitsubishi M74LS221P is a dual monostable multivibrator integrated circuit built on Low-Power Schottky TTL (LSTTL) logic. Housed in a standard 16-pin dual in-line package (DIP-16), it features Schmitt-trigger inputs on the B lines for jitter-free pulse triggering and true independent dual-channel operation for timing and pulse-shaping circuits.
Key Features
- Dual independent monostable multivibrators in a single DIP-16 package
- Schmitt-trigger B inputs provide clean pulse triggering from slow-rising signals
- Low-power Schottky TTL (LSTTL) architecture
- Standard through-hole 16-pin dual in-line package configuration
- Industry-standard 74LS221 pinout compatibility
Applications
- Replacing failed timing or pulse-generation ICs on vintage arcade boards, pinball machines, or legacy industrial controllers
- Benchtop prototyping and breadboarding of hardware pulse shapers, delay generators, and digital debounce circuits
- Repairing classic computer mainboards and peripheral expansion cards requiring authentic 74LS series logic
Frequently Asked Questions
What is the pinout compatibility of the M74LS221P?
The M74LS221P follows the standard industry 74LS221 16-pin DIP layout, making it a direct pin-compatible replacement for standard 74LS221, SN74LS221N, DM74LS221N, and HD74LS221P integrated circuits.
What is the primary operational difference between the 74LS221 and the 74LS123?
The 74LS221 is non-retriggerable, meaning incoming trigger pulses during an active timing cycle are ignored until the output pulse completes, unlike retriggerable devices such as the 74LS123.
Why buy this individual pulled IC instead of an unverified bulk surplus lot?
You receive the exact photographed Mitsubishi M74LS221P shown on this page, inspected for intact through-hole pins and clear top markings, without buying an unverified grab bag. Orders ship for an $8 flat rate, qualify for free standard shipping over $28, and leave our Idaho warehouse the same or next business day.
When troubleshooting a legacy timing fault, drop in an authentic LSTTL multivibrator and get your pulse circuits back on beat.
