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參數(shù)資料
| 型號： | HC595 |
| 廠商： | System Logic Semiconductor Co., Ltd. |
| 英文描述： | 8-Bit Serial-Input/Serial or Parallel-Output Shift Register with Latched 3-State Outputs |
| 中文描述： | 8位Serial-Input/Serial或并行輸出移位與鎖存3注冊態(tài)輸出 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大小： | 81K |
| 代理商： | HC595 |
SL74HC595
S ystem Logic
Semiconductor
SLS
FUNCTION TABLE
Inputs
Resulting Function
Operation
Reset Serial
Input
A
Shift
Clock
Latch
Clock
Output
Enable
Shift
Register
Contents
Latch
Register
Contents
Serial
Output
SQ
H
Parallel
Outputs
Q
A
-Q
H
Reset shift register
L
X
X
L,H,
L
L
U
L
U
Shift data into shift
register
H
D
L,H,
L
D SR
A
SR
N
SR
N+1
U
SR
G
SR
H
U
Shift register remains
unchanged
H
X
L,H,
L,H,
L
U
U
U
U
Transfer shift register
contents to latch
register
H
X
L,H,
L
U
SR
N
LR
N
U
SR
N
Latch register remains
unchanged
X
X
X
L,H,
L
*
U
*
U
Enable parallel
outputs
X
X
X
X
L
*
**
*
Enabled
Force outputs into
high-impedance state
X
X
X
X
H
*
**
*
Z
SR = shift register contents
X = don’t care
LR = latch register contents
Z = high impedance
D = data (L,H) logic level
* = depends on Reset and Shift Clock inputs
U = remains unchanged
** = depends on Latch Clock input
PIN DESCRIPTIONS
INPUTS:
A
- Serial Data Input. The data on this pin is shifted
into the 8-bit serial shift register.
CONTROL INPUTS:
Shift Clock
- Shift Register Clock Input. A low-to-
high transition on this input causes the data at the
Serial Input pin to be shifted into the 8-bit shift
register.
Reset
- Active-low, Asynchronous, Shift Register
Reset Input. A low on this pin resets the shift
register portion of this device only. The 8-bit latch
is not affected.
Latch Clock
- Storage Latch Clock Input. A low-to-
high transition on this input latches the shift
register data.
Output Enable
- Active-Low Output Enable. A low
on this input allows the data from the latches to
bepresented at the outputs. A high on this input
forces the outputs (Q
A
-Q
H
) into the high-impedance
state. The serial output is not affected by this
control unit.
OUTPUTS:
Q
A
-Q
H
- Noninverted, 3-state, latch outputs.
SQ
H
- Voninverted, Serial Data Output. This is the
output of the eighth stage of the 8-bit shift register.
This output does not have three-state capability.
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| HC595A | 制造商:ON Semiconductor 功能描述:PART READS:HC595A PBV934 |
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