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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.

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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

Page 1 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 VO...
Page 2 SCLS404E − APRIL 1998 − REVISED APRIL 2005 description/ordering information (continued) These synchronous, presettable counters feature an internal carry look-ahead for application in high-speed count...
Page 3 SCLS404E − APRIL 1998 − REVISED APRIL 2005 logic diagram (positive logic) CK LD For simplicity, routing of complementary signals LD and CK is not shown on this overall logic diagram. The uses of these...
Page 4 SCLS404E − APRIL 1998 − REVISED APRIL 2005 logic symbol, each D/T flip-flop M1LD (Load) G2TE (Toggle Enable) CK (Clock) 1, 2T/1C3 Q (Output) D (Inverted Data) 3D R (Inverted Reset) 4R logic diagram, e...
Page 5 SCLS404E − APRIL 1998 − REVISED APRIL 2005 typical clear, preset, count, and inhibit sequence The following sequence is illustrated below: 1. Clear outputs to zero (asynchronous) 2. Preset to binary 1...
Page 6 SCLS404E − APRIL 1998 − REVISED APRIL 2005 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC −0.5 V to 7 V. . . . . . . . . . . . ....
Page 7 SCLS404E − APRIL 1998 − REVISED APRIL 2005 recommended operating conditions (see Note 4) SN54LV161A SN74LV161A MIN MAX MIN MAX VCC Supply voltage 5.5 5.5 VCC = 2 V 1.5 1.5 VCC = 2.3 V to 2.7 V VCC × 0...
Page 8 SCLS404E − APRIL 1998 − REVISED APRIL 2005 timing requirements over recommended operating free-air temperature range, VCC = 2.5 V 0.2 V (unless otherwise noted) (see Figure 1) TA = 25°C SN54LV161A SN7...
Page 9 SCLS404E − APRIL 1998 − REVISED APRIL 2005 switching characteristics over recommended operating free-air temperature range, VCC = 2.5 V ± 0.2 V (unless otherwise noted) (see Figure 1) FROM TO LOAD TA ...
Page 10 SCLS404E − APRIL 1998 − REVISED APRIL 2005 switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1) FROM TO LOAD TA ...
Page 11 SCLS404E − APRIL 1998 − REVISED APRIL 2005 switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) FROM TO LOAD TA = ...
Page 12 SCLS404E − APRIL 1998 − REVISED APRIL 2005 PARAMETER MEASUREMENT INFORMATION VCC S1 RL = 1 kΩ Open From Output Test From Output TEST S1 Under Test Point Under Test t PLH/t PHL Open CL CL t PLZ/t PZL V...
Page 13 PACKAGE OPTION ADDENDUM www.ti.com 9-Aug-2005 PACKAGING INFORMATION Orderable Device Status Package Package Pins Package Eco Plan Lead/Ball Finish MSL Peak Temp Type Drawing Qty SN74LV161AD ACTIVE SOI...
Page 14 PACKAGE OPTION ADDENDUM www.ti.com 9-Aug-2005 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bas...
Page 15 MECHANICAL DATA MPDS006C – FEBRUARY 1996 – REVISED AUGUST 2000 DGV (R-PDSO-G**) PLASTIC SMALL-OUTLINE 24 PINS SHOWN 0,16 NOM Gage Plane Seating Plane 1,20 MAX 0,08 PINS ** DIM A MAX 3,70 5,10 5,103,70...
Page 18 MECHANICAL DATA MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001 DB (R-PDSO-G**) PLASTIC SMALL-OUTLINE 28 PINS SHOWN Gage Plane Seating Plane 2,00 MAX 0,05 MIN 0,10 PINS ** DIM A MAX 6,506,50 7,50 8,50...
Page 19 MECHANICAL DATA MTSS001C – JANUARY 1995 – REVISED FEBRUARY 1999 PW (R-PDSO-G**) PLASTIC SMALL-OUTLINE PACKAGE 14 PINS SHOWN 0,15 NOM Gage Plane Seating Plane 1,20 MAX 0,10 PINS ** DIM A MAX 3,10 5,10 ...
Page 20 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and servic...

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.