Datasheet > DM54161W/883

DM54161W/883

更新时间： 2024-11-15 20:04:59

品牌	Logo	应用领域
美国国家半导体 - NSC		逻辑集成电路触发器
页数	文件大小	规格书
10页	175K
描述
IC TTL/H/L SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT UP BINARY COUNTER, CDFP16, CERPACK-16, Counter

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DM54161W/883 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	CERPACK-16	Reach Compliance Code：	unknown
HTS代码：	8542.39.00.01	风险等级：	5.46
Is Samacsys：	N	计数方向：	UP
系列：	TTL/H/L	JESD-30 代码：	R-GDFP-F16
JESD-609代码：	e0	长度：	9.6645 mm
负载/预设输入：	YES	逻辑集成电路类型：	BINARY COUNTER
最大频率@ Nom-Sup：	25000000 Hz	最大I（ol）：	0.016 A
工作模式：	SYNCHRONOUS	位数：	4
功能数量：	1	端子数量：	16
最高工作温度：	125 °C	最低工作温度：	-55 °C
封装主体材料：	CERAMIC, GLASS-SEALED	封装代码：	DFP
封装等效代码：	FL16,.3	封装形状：	RECTANGULAR
封装形式：	FLATPACK	峰值回流温度（摄氏度）：	NOT SPECIFIED
电源：	5 V	最大电源电流（ICC）：	91 mA
传播延迟（tpd）：	29 ns	认证状态：	Not Qualified
筛选级别：	38535Q/M;38534H;883B	座面最大高度：	2.032 mm
子类别：	Counters	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：	MILITARY	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	FLAT	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
触发器类型：	POSITIVE EDGE	宽度：	6.604 mm
最小 fmax：	25 MHz	Base Number Matches：	1

DM54161W/883 数据手册

October 1992

DM54161/DM74161/DM74163

Synchronous 4-Bit Counters

General Description

These synchronous, presettable counters feature an inter-

nal carry look-ahead for application in high-speed counting

designs. The 161 and 163 are 4-bit binary counters. The

carry output is decoded by means of a NOR gate, thus pre-

venting spikes during the normal counting mode of opera-

tion. Synchronous operation is provided by having all flip-

flops clocked simultaneously so that the outputs change co-

incident with each other when so instructed by the 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 the clock input waveform.

external NAND gate. The gate output is connected to the

clear input to synchronously clear the counter to all low out-

puts. Low-to-high transitions at the clear input of the 163 are

also permissible, regardless of the logic levels on the clock,

enable, or load inputs.

The carry look-ahead circuitry provides for cascading coun-

ters for n-bit synchronous applications without additional

gating. Instrumental in accomplishing this function are two

count-enable inputs and a ripple carry output. Both count-

enable inputs (P and T) must be high to count, and input T is

fed forward to enable the ripple carry output. The ripple car-

ry output thus enabled will produce a high-level output pulse

with a duration approximately equal to the high-level portion

These counters are fully programmable; that is, the outputs

may be preset to either level. As presetting is synchronous,

setting up a low level at the load input disables the counter

and causes the outputs to agree with the setup data after

the next clock pulse, regardless of the levels of the enable

input. The clear function for the 161 is asynchronous; and a

low level at the clear input sets all four of the flip-flop out-

puts low, regardless of the levels of clock, load, or enable

inputs. The clear function for the 163 is synchronous; and a

low level at the clear input sets all four of the flip-flop out-

puts low after the next clock pulse, regardless of the levels

of the enable inputs. This synchronous clear allows the

count length to be modified easily, as decoding the maxi-

mum count desired can be accomplished with one

of the Q output. This high-level overflow ripple carry pulse

can be used to enable successive cascaded stages. High-

to-low-level transitions at the enable P or T inputs of the 161

through 163 may occur, regardless of the logic level on the

clock.

Features

Synchronously programmable

Internal look-ahead for fast counting

Carry output for n-bit cascading

Synchronous counting

Load control line

Diode-clamped inputs

Connection Diagram

Dual-In-Line Package

TL/F/6551–1

Order Number DM54161J, DM54161W,

DM74161N or DM74163N

See NS Package Number J16A, N16E or W16A

1995 National Semiconductor Corporation

TL/F/6551

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6 7...10

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与DM54161W/883相关器件

型号	品牌	获取价格	描述	数据表
DM54162AJ	ROCHESTER	获取价格	Decade Counter,
DM54162AW	ROCHESTER	获取价格	Decade Counter,
DM54163A	NSC	获取价格	SYNCHRONOUS 4-BIT COUNTERS
DM54163AJ	NSC	获取价格	Synchronous 4-Bit Counters
DM54163AJ/883	ETC	获取价格	Synchronous Up Counter
DM54163AJ/883B	TI	获取价格	IC,COUNTER,UP,4-BIT BINARY,STD-TTL,DIP,16PIN,CERAMIC
DM54163AW	NSC	获取价格	Synchronous 4-Bit Counters
DM54163AW/883	ETC	获取价格	Synchronous Up Counter
DM54163AW/883B	TI	获取价格	IC,COUNTER,UP,4-BIT BINARY,STD-TTL,FP,16PIN,CERAMIC
DM54163AW/883C	TI	获取价格	IC,COUNTER,UP,4-BIT BINARY,STD-TTL,FP,16PIN,CERAMIC

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