參數(shù)資料
型號: M74HC690B1R
廠商: 意法半導(dǎo)體
元件分類: 通用總線功能
英文描述: HC691/693 4 BIT BINARY COUNTER/REGISTER 3-STATE HC690/692 DECADE COUNTER/REGISTER 3-STATE
中文描述: HC691/693 4位二進制計數(shù)器/注冊3態(tài)HC690/692十進制計數(shù)器/寄存器三態(tài)
文件頁數(shù): 2/23頁
文件大小: 433K
代理商: M74HC690B1R
counter’s outputsare stored inthe output register at
the positive edge of the register clock (RCK). If the
register clear input (RCLR) is held ”L” the register is
cleared (synchronously
to
register
clock
for
HC692/HC693
HC690/HC691). Allinputsareequipped withprotec-
tion circuits against static discharge and transient
excess voltage.
and
asynchronously
for
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
3 to 6
7, 14
15 to 18
1
SYMBOL
A to D
ENT, ENP
QA to QD
CCLR
NAME AND FUNCTION
Data Inputs
Enable Inputs
Data Outputs
Counter Clear (Active
LOW)
Counter Clock
Counter/ Register Select
Register Clear (Active
LOW)
Register Clock
Ripple Counter Output
Ground (0V)
Positive Supply Voltage
2
CCK
R/C
RCLR
11
8
9
RCK
RCO
GND
V
CC
19
10
20
IEC LOGIC SYMBOLS
HC691
HC692
HC693
HC690
M54/M74HC690/691/692/693
2/23
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