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74LVT32373GX датащи(PDF) 2 Page - Fairchild Semiconductor

номер детали 74LVT32373GX
подробное описание детали  Low Voltage 32-Bit Transparent Latch with 3-STATE Outputs (Preliminary)
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производитель  FAIRCHILD [Fairchild Semiconductor]
домашняя страница  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74LVT32373GX датащи(HTML) 2 Page - Fairchild Semiconductor

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Preliminary
www.fairchildsemi.com
2
Connection Diagram
(Top Thru View)
Pin Descriptions
FBGA Pin Assignments
Truth Table
H
= HIGH Voltage Level
L
= LOW Voltage Level
X
= Immaterial
Z
= HIGH Impedance
Oo = Previous Oo prior to HIGH-to-LOW transition of LE
Functional Description
The LVT32373 and LVTH32373 contain thirty-two D-type latches with 3-STATE standard outputs. The device is byte con-
trolled with each byte functioning identically, but independent of the other. Control pins can be shorted together to obtain full
32-bit operation. The following description applies to each byte. When the Latch Enable (LEn) input is HIGH, data on the Dn
enters the latches. In this condition the latches are transparent, i.e, a latch output will change states each time its D input
changes. When LEn is LOW, the latches store information that was present on the D inputs a setup time preceding the
HIGH-to-LOW transition of LEn. The 3-STATE standard outputs are controlled by the Output Enable (OEn) input. When OEn
is LOW, the standard outputs are in the 2-state mode. When OEn is HIGH, the standard outputs are in the high impedance
mode but this does not interfere with entering new data into the latches.
Pin Names
Description
OEn
Output Enable Input (Active LOW)
LEn
Latch Enable Input
I0–I31
Inputs
O0–O31
3-STATE Outputs
123
456
A
O1
O0
OE1
LE1
I0
I1
B
O3
O2
GND
GND
I2
I3
C
O5
O4
VCC1
VCC1
I4
I5
D
O7
O6
GND
GND
I6
I7
E
O9
O8
GND
GND
I8
I9
F
O11
O10
VCC1
VCC1
I10
I11
G
O13
O12
GND
GND
I12
I13
H
O14
O15
OE2
LE2
I15
I14
J
O17
O16
OE3
LE3
I16
I17
K
O19
O18
GND
GND
I18
I19
L
O21
O20
VCC2
VCC2
I20
I21
M
O23
O22
GND
GND
I22
I23
N
O25
O24
GND
GND
I24
I25
P
O27
O26
VCC2
VCC2
I26
I27
R
O29
O28
GND
GND
I28
I29
T
O30
O31
OE4
LE4
I31
I30
Inputs
Outputs
Inputs
Outputs
CP1
OE1
I0–I7
O0–O7
CP2
OE2
I8–I15
O8–O15
XH
X
Z
XHX
Z
HL
L
L
HL
L
L
HL
H
H
HL
H
H
LL
X
O0
LL
X
O0
Inputs
Outputs
Inputs
Outputs
CP3
OE3
I16–I23
O16–O23
CP4
OE4
I24–I31
O24–O31
XH
X
Z
XHX
Z
HL
L
L
HL
L
L
HL
H
H
HL
H
H
LL
X
O0
LL
X
O0


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