參數(shù)資料
型號(hào): IN74HC161AN
廠商: INTEGRAL JOINT STOCK COMPANY
元件分類: 通用總線功能
英文描述: PRESETTABLE COUNTERS
中文描述: 預(yù)置計(jì)數(shù)器
文件頁(yè)數(shù): 1/9頁(yè)
文件大小: 189K
代理商: IN74HC161AN
IN74HC161A
1
P
RESETTABLE
C
OUNTERS
High-Performance Silicon-Gate CMOS
The IN74HC161A is identical in pinout to the LS/ALS161. The
device inputs are compatible with standard CMOS outputs; with
pullup resistors, they are compatible with LS/ALSTTL outputs.
The IN74HC161A is programmable 4-bit synchronous counter
that feature parallel Load, asynchronous Reset, a Carry Output
for cascading and count-enable controls.
The IN74HC161A is binary counter with asynchronous Reset.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1.0
μ
A
High Noise Immunity Characteristic of CMOS Devices
ORDERING INFORMATION
IN74HC161AN Plastic
IN74HC161AD SOIC
T
A
= -55
°
to 125
°
C for all
packages
LOGIC DIAGRAM
PIN 16 =V
CC
PIN 8 = GND
FUNCTION TABLE
Inputs
Enable
P
X
X
X
L
H
X
Outputs
Q1
Rese
t
L
H
H
H
H
H
X=don’t care
P0,P1,P2,P3 = logic level of Data inputs
Ripple Carry Out = Enable T
Q0
Q1
Q2
Q3
Load
Enable
T
X
X
L
X
H
X
Clock
Q0
Q2
Q3
Function
X
L
H
H
H
X
X
L
P0
L
P1
No change
No change
Count up
No change
L
P2
L
P3
Reset to “0”
Preset Data
No count
No count
Count
No count
PIN ASSIGNMENT
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