Datasheet > DM74AS169AM

DM74AS169AM

更新时间： 2024-11-27 20:20:23

品牌	Logo	应用领域
罗彻斯特 - ROCHESTER		光电二极管逻辑集成电路触发器
页数	文件大小	规格书
7页	279K
描述
Binary Counter, AS Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL, PDSO16, 0.150 INCH, MS-012, SOIC-16

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DM74AS169AM 技术参数

生命周期：	Contact Manufacturer	包装说明：	0.150 INCH, MS-012, SOIC-16
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.71	Is Samacsys：	N
计数方向：	BIDIRECTIONAL	系列：	AS
JESD-30 代码：	R-PDSO-G16	长度：	9.9 mm
负载/预设输入：	YES	逻辑集成电路类型：	BINARY COUNTER
工作模式：	SYNCHRONOUS	位数：	4
功能数量：	1	端子数量：	16
最高工作温度：	70 °C	最低工作温度：
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
传播延迟（tpd）：	13 ns	座面最大高度：	1.75 mm
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	4.5 V
标称供电电压 (Vsup)：	5 V	表面贴装：	YES
技术：	TTL	温度等级：	COMMERCIAL
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	触发器类型：	POSITIVE EDGE
宽度：	3.9 mm	最小 fmax：	75 MHz
Base Number Matches：	1

DM74AS169AM 数据手册

June 2007

DM74AS169A

Synchronous 4-Bit Binary Up/Down Counter

Features

General Description

■ Switching Specifications at 50pF

These synchronous presettable counters feature an

internal carry look ahead for cascading in high speed

counting applications. The DM74AS169 is a 4-bit binary

up/down counter. The carry output is decoded to prevent

spikes during normal mode of counting operation. Syn-

chronous operation is provided so that outputs change

coincident with each other when so instructed by count

enable inputs and internal gating. This mode of operation

eliminates the output counting spikes which are normally

associated with asynchronous (ripple clock) counters. A

buffered clock input triggers the four flip-flops on the

rising (positive going) edge of clock input waveform.

■ Switching Specifications guaranteed over full

temperature and V range

■ Advanced oxide-isolated, ion-implanted Schottky TTL

process

■ Functionally and pin-for-pin compatible with Schottky

and low power Schottky TTL counterpart

■ Improved AC performance over Schottky and low

power Schottky counterparts

■ Synchronously programmable

■ Internal look ahead for fast counting

■ Carry output for n-bit cascading

■ Synchronous counting

■ Load control line

These counters are fully programmable; that is, the out-

puts may each be preset either HIGH or LOW. The load

input circuitry allows loading with carry-enable output of

cascaded counters. As loading is synchronous, setting

up a LOW level at the load input disables the counter and

causes the outputs to agree with the data inputs after the

next clock pulse.

■ ESD inputs

The carry look-ahead circuitry permits cascading

counters for n-bit synchronous applications without addi-

tional gating. Both count enable inputs (P and T) must be

LOW to count. The direction of the count is determined

by the level of the up/down input. When the input is

HIGH, the counter counts UP; when LOW, it counts

DOWN. Input T is fed forward to enable the carry out-

puts. The carry output thus enabled will produce a LOW

level output pulse with a duration approximately equal to

the HIGH portion of the QA output when counting UP,

and approximately equal to the LOW portion of the QA

output when counting DOWN. This LOW level overflow

carry pulse can be used to enable successively cas-

caded stages. Transitions at the enable P or T inputs are

allowed regardless of the level of the clock input.

The control functions for these counters are fully syn-

chronous. Changes at control inputs (enable P, enable T,

load, up/down) which modify the operating mode have no

effect until clocking occurs. The function of the counter

(whether enabled, disabled, loading or counting) will be

dictated solely by the conditions meeting the stable setup

and hold times.

Ordering Information

Order

Number

Package

Number

Package Description

DM74AS169AM

M16A

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow

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

DM74AS169A Rev. 1.2

www.fairchildsemi.com

12 3 4 5 6 7

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与DM74AS169AM相关器件

型号	品牌	获取价格	描述	数据表
DM74AS169AMX	FAIRCHILD	获取价格	Synchronous Up/Down Counter
DM74AS169AMX	ROCHESTER	获取价格	Binary Counter, AS Series, Synchronous, Positive Edge Triggered, 4-Bit, Bidirectional, TTL
DM74AS169AN	FAIRCHILD	获取价格	Synchronous 4-Bit Binary Up/Down Counter
DM74AS169AN/A+	ETC	获取价格	Synchronous Up/Down Counter
DM74AS169AN/B+	ETC	获取价格	Synchronous Up/Down Counter
DM74AS169J/A+	ETC	获取价格	Synchronous Up/Down Counter
DM74AS169N/A+	ETC	获取价格	Synchronous Up/Down Counter
DM74AS169N/B+	ETC	获取价格	Synchronous Up/Down Counter
DM74AS174J	TI	获取价格	IC,FLIP-FLOP,HEX,D TYPE,AS-TTL,DIP,16PIN,CERAMIC
DM74AS174J/A+	ETC	获取价格	Hex D-Type Flip-Flop

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