SN74LS191NSR
- Mfr.Part #
- SN74LS191NSR
- Manufacturer
- Texas Instruments
- Package / Case
- 16-SOIC (0.209, 5.30mm Width)
- Datasheet
- Download
- Description
- IC SYNC 4-BIT UP/DN CNTR 16SO
- Stock
- 1,391
- In Stock :
- 1,391
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- Manufacturer :
- Texas Instruments
- Product Category :
- Counters, Dividers
- Logic Type :
- BINARY COUNTER
- Moisture Sensitivity Level (MSL) :
- 1 (Unlimited)
- Length :
- 10.3mm
- Trigger Type :
- POSITIVE EDGE
- Peak Reflow Temperature (Cel) :
- 260
- Terminal Finish :
- Nickel/Palladium/Gold (Ni/Pd/Au)
- Direction :
- Up, Down
- Packaging :
- Tape and Reel (TR)
- Load/Preset Input :
- yes
- Height :
- 2mm
- Weight :
- 200.686274mg
- Lifecycle Status :
- ACTIVE (Last Updated: 4 days ago)
- RoHS Status :
- ROHS3 Compliant
- Clock Edge Trigger Type :
- POSITIVE EDGE
- Frequency :
- 25MHz
- Mount :
- Surface Mount
- fmax-Min :
- 20 MHz
- Power Supplies :
- 5V
- Pin Count :
- 16
- Series :
- 74LS
- Base Part Number :
- 74LS191
- Terminal Position :
- Dual
- Operating Supply Voltage :
- 5V
- Logic Function :
- Counter
- JESD-609 Code :
- e4
- Terminal Form :
- Gull wing
- Mounting Type :
- Surface Mount
- Family :
- LS
- Qualification Status :
- Not Qualified
- Number of Functions :
- 1
- Number of Terminations :
- 16
- Package / Case :
- 16-SOIC (0.209, 5.30mm Width)
- Number of Bits per Element :
- 4
- Voltage - Supply :
- 4.75V~5.25V
- Operating Temperature :
- 0°C~70°C
- Supply Voltage :
- 5V
- Time@Peak Reflow Temperature-Max (s) :
- NOT SPECIFIED
- Number of Elements :
- 1
- ECCN Code :
- EAR99
- Pbfree Code :
- yes
- Factory Lead Time :
- 6 Weeks
- Lead Free :
- Contains Lead
- Packing Method :
- TR
- Timing :
- SYNCHRONOUS
- Propagation Delay :
- 52 ns
- Number of Pins :
- 16
- Additional Feature :
- TCO OUTPUT
- Thickness :
- 1.95mm
- Width :
- 5.3mm
- Datasheets
- SN74LS191NSR

Counters, Dividers Texas Instruments SN74LS191NSR Overview
The SN74LS191NSR from Texas Instruments is a versatile synchronous 4-bit up/down counter integrated circuit, designed for precision counting applications in a variety of electronic systems. This counter features a dual-mode operation, allowing it to count both upwards and downwards, making it an ideal choice for complex computation needs in industrial and commercial devices. The integration of this IC in your systems ensures reliable and accurate performance, thanks to its robust design and Texas Instruments' commitment to quality. Utilizing the Counters, Dividers Texas Instruments SN74LS191NSR in your designs can significantly enhance the efficiency and functionality of your electronic products.
SN74LS191NSR Features
The SN74LS191NSR IC boasts several key features including a synchronous counting operation which enables error-free counting, ideal for high-speed applications. It supports both up and down modes, which can be easily configured according to user needs. The device operates from a standard 5V supply, ensuring compatibility with common logic families. Its output capability includes a direct clear function, and it is encapsulated in a 16-pin SO package, minimizing space and easing PCB design challenges.
SN74LS191NSR Applications
- Digital Counters: Utilized for precise counting in digital clocks, frequency counters, and event counters where accuracy is paramount.
- Process Control Systems: Helps in maintaining accurate process counts and timings, crucial for automation systems in industrial applications.
- Voting Machines: Ensures accurate vote tallying and data integrity in electronic voting systems.
- Instrumentation: Integral for measurement systems that require exact data logging and manipulation.
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