DM74LS90M

更新时间： 2024-09-14 22:31:03

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		计数器触发器逻辑集成电路光电二极管
页数	文件大小	规格书
6页	64K
描述
Decade and Binary Counters

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数据手册
替代型号

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DM74LS90M 数据手册

August 1986

Revised March 2000

DM74LS90

Decade and Binary Counters

General Description

Features

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 DM74LS90.

■ Typical power dissipation 45 mW

■ Count frequency 42 MHz

All of these counters have a gated zero reset and the

DM74LS90 also has gated set-to-nine inputs for use in

BCD nine’s complement applications.

To use their maximum count length (decade or four bit

binary), the B input is connected to the Q_Aoutput. The

input count pulses are applied to input A and the outputs

are as described in the appropriate truth table. A symmetri-

cal divide-by-ten count can be obtained from the

DM74LS90 counters by connecting the Q_Doutput to the A

input and applying the input count to the B input which

gives a divide-by-ten square wave at output Q_A.

Ordering Code:

Order Number Package Number

Package Description

DM74LS90M

DM74LS90N

M14A

N14A

14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow

14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Reset/Count Truth Table

Reset Inputs

Output

R0(1)

R0(2)

R9(1)

R9(2) Q_DQ_CQ_BQ_A

COUNT

DS006381

www.fairchildsemi.com

12 3 4 5 6

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DM74LS90M 替代型号

型号	品牌	替代类型	描述	数据表
SN74LS90DRE4	TI	功能相似	DECADE, DIVIDE-BY-TWELVE AND BINARY COUNTERS
DM74LS90N	FAIRCHILD	功能相似	Decade and Binary Counters
SN74LS90D	TI	功能相似	DECADE, DIVIDE-BY-TWELVE AND BINARY COUNTERS

与DM74LS90M相关器件

型号	品牌	获取价格	描述	数据表
DM74LS90MX	FAIRCHILD	获取价格	Asynchronous Up Counter
DM74LS90N	FAIRCHILD	获取价格	Decade and Binary Counters
DM74LS90N	NSC	获取价格	Decade and Binary Counters
DM74LS90N	TI	获取价格	LS SERIES, ASYN NEGATIVE EDGE TRIGGERED 3-BIT UP DECADE COUNTER, PDIP14, PLASTIC, DIP-14
DM74LS90N/A+	ETC	获取价格	Asynchronous Up Counter
DM74LS90N/B+	ETC	获取价格	Asynchronous Up Counter
DM74LS92J	NSC	获取价格	IC,COUNTER,UP,MODULO-12,LS-TTL,DIP,14PIN,CERAMIC
DM74LS92J/A+	ETC	获取价格	Asynchronous Up Counter
DM74LS92N	NSC	获取价格	IC,COUNTER,UP,MODULO-12,LS-TTL,DIP,14PIN,PLASTIC
DM74LS92N/A+	ETC	获取价格	Asynchronous Up Counter