Integrated Circuits (ICs)

SN74LS90NSR

Obsolete

Texas Instruments

LOGIC GATES AND INVERTERS

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Integrated Circuits (ICs)

SN74LS90NSR

Obsolete

Texas Instruments

LOGIC GATES AND INVERTERS

Deep-Dive with AI

Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	SN74LS90NSR

Count Rate	42 MHz
Direction	Up
Logic Type	Counter, Decade
Mounting Type	Surface Mount
Number of Bits per Element	4
Number of Elements	1
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Package / Case	14-SOIC
Package / Case [x]	0.209 "
Package / Case [y]	5.3 mm
Reset	Asynchronous
Supplier Device Package	14-SO
Trigger Type	Negative Edge
Voltage - Supply [Max]	5.25 V
Voltage - Supply [Min]	4.75 V

SN74LS90 Series

Decade Counter

Part	Logic Type	Trigger Type	Number of Elements	Reset	Voltage - Supply [Min]	Voltage - Supply [Max]	Mounting Type	Operating Temperature [Max]	Package / Case [x]	Package / Case [y]	Package / Case	Direction	Count Rate	Number of Bits per Element	Supplier Device Package
Texas Instruments SN74LS90D	Counter Decade	Negative Edge	1	Asynchronous	4.75 V	5.25 V	Surface Mount	70 °C	0.154 in	3.9 mm	14-SOIC	Up	42 MHz	4
Texas Instruments SN74LS90DRG4	Counter Decade	Negative Edge	1	Asynchronous	4.75 V	5.25 V	Surface Mount	70 °C	0.154 in	3.9 mm	14-SOIC	Up	42 MHz	4
Texas Instruments SN74LS90NSR	Counter Decade	Negative Edge	1	Asynchronous	4.75 V	5.25 V	Surface Mount	70 °C	0.209 "	5.3 mm	14-SOIC	Up	42 MHz	4	14-SO
Texas Instruments SN74LS90NE4	Counter Decade	Negative Edge	1	Asynchronous	4.75 V	5.25 V	Through Hole	70 °C	0.3 "	7.62 mm	14-DIP	Up	42 MHz	4
Texas Instruments SN74LS90DG4	Counter Decade	Negative Edge	1	Asynchronous	4.75 V	5.25 V	Surface Mount	70 °C	0.154 in	3.9 mm	14-SOIC	Up	42 MHz	4
Texas Instruments SN74LS90DR	Counter Decade	Negative Edge	1	Asynchronous	4.75 V	5.25 V	Surface Mount	70 °C	0.154 in	3.9 mm	14-SOIC	Up	42 MHz	4

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Bulk	213	$ 1.41
		224	$ 1.34

Description

General part information

SN74LS90 Series

Each of these monolithic counters contains four master-slave flip-flops and additional gating to provide a divide-by-two counter and a three-stage binary counter for which the count cycle length is divide-by-five for the '90A and 'LS90, divide-by-six for the '92A and 'LS92, and the divide-by eight for the '93A and 'LS93.

All of these counters have a gated zero reset and the '90A and 'LS90 also have gated set-to-nine inputs for use in BCD nine's complement applications.

To use their maximum count length (decade, divide-by-twelve, or four-bit binary) of these counters, the CKB input is connected to the QAoutput. The input count pulses are applied to CKA input and the outputs are as described in the appropriate function table. A symmetrical divide-by-ten count can be obtained from the '90A or 'LS90 counters by connecting the QDoutput to the CKA input and applying the input count to the CKB input which gives a divide-by-ten square wave at output QA.

Documents

Technical documentation and resources

No documents available