Texas Instruments SN54LV161A & SN74LV161A Datasheets & User Manuals
Summary
This comprehensive technical datasheet details the SN74LV161A, a fully programmable 4-bit synchronous binary counter designed for precision digital timing circuits. It features internal carry look-ahead for seamless integration into multi-stage (n-bit) counting designs and supports partial-power-down modes. The manual provides critical specifications, including operational voltage ranges (2V to 5.5V), reset/load procedures, pin configurations across various packages, and guidelines necessary for implementing high-speed synchronous counting applications in complex electronic systems.
Page 1 Text Content
查询SN74LV161AD供应商
SCLS404E − APRIL 1998 − REVISED APRIL 2005
2-V to 5.5-V VCC Operation SN54LV161A J OR W PACKAGE SN74LV161A D, DB, DGV, NS, OR PW PACKAGE
Max tpd of 9.5 ns at 5 V
(TOP VIEW)
Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C CLR VCC
Typical VOHV (Output VOH Undershoot) CLK RCO
>2.3 V at VCC = 3.3 V, TA = 25°C QA QB
Support Mixed-Mode Voltage Operation on
All Ports
Internal Look-Ahead for Fast Counting
ENP ENT
Carry Output for n-Bit Cascading
GND LOAD
Synchronous Counting Synchronously Programmable
SN54LV161A FK PACKAGE
Ioff Supports Partial-Power-Down Mode (TOP VIEW) Operation Latch-Up Performance Exceeds 100 m A Per JESD 78, Class II ESD Protection Exceeds JESD 22 QA − 2000-V Human-Body Model (A114-A) QB − 200-V Machine Model (A115-A) NC NC − 1000-V Charged-Device Model (C101) QC
description/ordering information The ’LV161A devices are 4-bit synchronous binary counters designed for 2-V to 5.5-V VCC operation.
NC − No internal connection
ORDERING INFORMATION LR
ORDERABLE TOP-SIDE
TA PACKAGE†
PART NUMBER LO MARKING
Tube of 40 SN74LV161AD
SOIC − D LV161A
Reel of 2500 SN74LV161ADR
SOP − NS Reel of 2000 SN74LV161ANSR 74LV161A SSOP − DB Reel of 2000 SN74LV161ADBR LV161A
−40°C to 85°C
Tube of 90 SN74LV161APW TSSOP − PW Reel of 2000 SN74LV161APWR LV161A Reel of 250 SN74LV161APWT
TVSOP − DGV Reel of 2000 SN74LV161ADGVR LV161A CDIP − J Tube of 25 SNJ54LV161AJ SNJ54LV161AJ
−55°C to 125°C CFP − W Tube of 150 SNJ54LV161AW SNJ54LV161AW
LCCC − FK Tube of 55 SNJ54LV161AFK SNJ54LV161AFK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2005, Texas Instruments Incorporated !"#$ $%$ &
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page Summary Contents For Texas Instruments SN54LV161A & SN74LV161A Datasheets & User Manuals
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 20 |
| File Size | 429.01 KB |
| Published | June 06, 2026 |
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Frequently Asked Questions
What inputs are required to enable counting operations?
Both ENP and ENT must be high for the counter to operate.
Can this device be cascaded with other counters?
Yes, it uses internal carry look-ahead circuitry and the Ripple-Carry Output (RCO) for n-bit applications.
What is the operational voltage range?
The LV161A devices are designed for operation over a 2.0V to 5.5V range.