參數(shù)資料
型號(hào): M74HC192
廠商: 意法半導(dǎo)體
元件分類(lèi): 通用總線功能
英文描述: SYNCHRONOUS UP/DOWN DECADE COUNTER
中文描述: 同步向上/向下計(jì)數(shù)器十年
文件頁(yè)數(shù): 2/14頁(yè)
文件大小: 527K
代理商: M74HC192
M74HC192
2/14
INPUT AND OUTPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
TRUTH TABLE
X : Don’t Care
PIN No
SYMBOL
NAME AND FUNCTION
3, 2, 6, 7
QA to QD
COUNT
DOWN
COUNT UP
Flip-Flop Outputs
4
Count Down Clock Input
5
Count Up Clock Input
Asynchronous Parallel
Load Input (Active LOW)
Count Up (Carry)
Output (Active LOW)
Count Down (Borrow)
Output (Active LOW)
Asynchronous Reset
Input (Active High)
Data Inputs
Ground (0V)
Positive Supply Voltage
11
LOAD
12
CARRY
13
BORROW
14
CLEAR
15, 1, 10, 9
8
16
A to D
GND
Vcc
COUNT UP
COUNT DOWN
LOAD
CLEAR
FUNCTION
H
H
L
COUNT UP
H
H
L
NO COUNT
H
H
L
COUNT DOWN
H
X
X
H
L
X
L
L
H
NO COUNT
PRESET
RESET
X
X
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