參數(shù)資料
型號(hào): 74F189
廠商: National Semiconductor Corporation
英文描述: 64-Bit Random Access Memory with TRI-STATE Outputs(帶三態(tài)輸出的64位RAM)
中文描述: 64位隨機(jī)存取存儲(chǔ)器具有三態(tài)輸出(帶三態(tài)輸出的64位內(nèi)存)
文件頁數(shù): 2/8頁
文件大?。?/td> 166K
代理商: 74F189
Unit Loading/Fan Out
54F/74F
Pin Names
Description
U.L.
Input I
IH
/I
IL
Output I
OH
/I
OL
HIGH/LOW
A
0
–A
3
CS
WE
D
0
–D
3
O
0
–O
3
Address Inputs
Chip Select Input (Active LOW)
Write Enable Input (Active LOW)
Data Inputs
Inverted Data Outputs
1.0/1.0
1.0/1.0
1.0/1.0
1.0/1.0
150/40 (33.3)
20
m
A/
b
0.6 mA
20
m
A/
b
1.2 mA
20
m
A/
b
0.6 mA
20
m
A/
b
0.6 mA
b
3.0 mA/24 mA (20 mA)
Function Table
Inputs
Operation
Condition of Outputs
CS
WE
L
L
H
L
H
X
Write
Read
Inhibit
High Impedance
Complement of Stored Data
High Impedance
H
e
HIGH Voltage Level
L
e
LOW Voltage Level
X
e
Immaterial
Block Diagram
TL/F/9493–5
2
相關(guān)PDF資料
PDF描述
74F190 Up/Down Decade Counter with Preset and Ripple Clock(帶可預(yù)置和脈動(dòng)時(shí)鐘的可逆十進(jìn)制計(jì)數(shù)器)
74F190PC Up/Down Decade Counter with Preset and Ripple Clock
74F190SC Up/Down Decade Counter with Preset and Ripple Clock
74F190 Up/Down Decade Counter with Preset and Ripple Clock
74F190SCX Synchronous Up/Down Counter
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