Product Overview
Texas Instruments SN74LS393N Dual 4-Bit Binary Counter DIP-14 Logic IC
Condition
Used. Equipment pull. Top surface markings legible: Texas Instruments logo, 3401 LTK, SN74LS393N. Evaluation: Visual inspection only. Function testing not performed.
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Product Overview
The Texas Instruments SN74LS393N contains two independent 4-bit binary counters in a 14-pin dual in-line package. Fabricated with low-power Schottky TTL technology, each counter section features its own clock input and clear line, allowing operation as separate divide-by-2, 4, 8, or 16 stages, or cascaded together for up to 8-bit divide-by-256 frequency division.
Key Features
- Dual independent 4-bit binary ripple counters
- Low-power Schottky TTL (74LS) logic architecture
- Nominal 5V supply voltage (4.75V to 5.25V operating range)
- 35 MHz typical maximum count frequency
- Direct clear input for immediate reset per counter
- Standard 14-pin DIP plastic through-hole package
Applications
- Bench prototyping and breadboard digital logic timing circuits
- Frequency dividers, clock prescalers, and digital event counting
- Repairing legacy industrial control boards and vintage computing hardware
- Makers and hobbyists building custom TTL synthesizers, sequencer modules, or arcade board repairs
Frequently Asked Questions
Can the two counter sections be cascaded?
Yes. Connecting the high-order output of the first 4-bit stage to the clock input of the second stage configures the device as a single 8-bit binary counter.
What supply voltage does this device require?
It operates from a standard 5V nominal DC supply within the standard 4.75V to 5.25V LS-TTL operating range.
Why buy this individual used pull instead of an unsorted surplus lot?
You receive the exact Texas Instruments IC shown in the photos with verified part markings, avoiding unneeded bulk surplus or unvetted lots. Orders ship for an $8 flat rate, qualify for free shipping at $28 or more, and leave our Idaho warehouse the same or next business day.
Drop this classic TTL divider into your socket to keep vintage timing circuits stepping right on beat.
