1
PS2100C 11/14/02
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
O0
D0
D1
O1
O2
D2
D3
O3
GND
Vcc
O7
D7
D6
O6
O5
D5
D4
O4
LE
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PI74LCX373
Fast CMOS 3.3V 8-Bit Transparent Latch
Product Features
Functionally compatible with FCT3, LVT, and 74
series 373 families of products
Tri-State outputs
5V Tolerant inputs and outputs
2.0V-3.6V V
CC
supply operation
Balanced sink and source output drives (24 mA)
Low ground bounce outputs
Power Down High Impedance inputs and outputs.
Supports live insertion
ESD Protection exceeds 2000V, Human Body Model
200V, Machine Model
Packages available:
20-pin 209-mil wide plastic SSOP (H)
20-pin 173-mil wide plastic TSSOP (L)
20-pin 150-mil wide plastic QSOP (Q)
20-pin 300-mil wide plastic SOIC (S)
Product Description
Pericom Semiconductor's PI74LCX series of logic circuits are pro-
duced using the Company's advanced 0.6 micron CMOS technology,
achieving industry leading speed grades.
The PI74LCX373 is an 8-bit transparent latch designed with
3-state outputs and is intended for bus oriented applications. When
Latch Enable (LE) is HIGH, the flip-flops appear transparent to the
data. The data that meets the set-up time when LE is LOW is latched.
When OE is HIGH, the bus output is in the high impedance state.
The PI74LCX373 can be driven from either 3.3V or 5.0V devices
allowing this device to be used as a translator in a mixed
3.3/5.0V system.
Logic Block Diagram
Product Pin Configuration
Product Pin Description
Truth Table
(1)
Note: 1. H = High Voltage Level, X = Don't Care,
L = Low Voltage Level, Z = High Impedance
O
0
= Previous O
0
before HIGH-to-LOW transition
of latch enable
s
t
u
p
n
I
s
t
u
p
t
u
O
D
N
E
L
E
O
O
N
H
H
L
H
L
H
L
L
X
X
H
Z
X
L
L
O
0
e
m
a
N
n
i
P
n
o
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t
p
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r
c
s
e
D
OE
)
W
O
L
e
v
it
c
A
(
t
u
p
n
I
e
l
b
a
n
E
t
u
p
t
u
O
E
L
)
H
G
I
H
e
v
it
c
A
(
t
u
p
n
I
e
l
b
a
n
E
h
c
t
a
L
7
D
-
0
D
s
t
u
p
n
I
a
t
a
D
7
O
-
0
O
s
t
u
p
t
u
O
e
t
a
t
S
-
3
D
N
G
d
n
u
o
r
G
V
CC
r
e
w
o
P
20-Pin
H, L,
Q, S
OE
LE
O
0
G
D
D0
TO 7 OTHER CHANNELS
Q
2
PS2100C 11/14/02
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PI74LCX373
3.3V, 8-Bit Transparent Latch
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the de-
vice. This is a stress rating only and functional opera-
tion of the device at these or any other conditions
above those indicated in the operational
sections of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
Recommended Operating Conditions
l
o
b
m
y
S
r
e
t
e
m
a
r
a
P
.
n
i
M
.
x
a
M
s
t
i
n
U
V
CC
e
g
a
tl
o
V
y
l
p
p
u
S
g
n
it
a
r
e
p
O
0
.
2
6
.
3
V
n
o
it
n
e
t
e
R
a
t
a
D
5
.
1
6
.
3
V
I
e
g
a
tl
o
V
t
u
p
n
I
0
5
.
5
V
O
e
g
a
tl
o
V
t
u
p
t
u
O
e
t
a
t
S
W
O
L
r
o
H
G
I
H
0
V
CC
e
t
a
t
S
-
I
R
T
0
5
.
5
I
OH
I
/
OL
t
n
e
r
r
u
C
t
u
p
t
u
O
V
CC
V
6
.
3
-
V
0
.
3
=
4
2
A
m
V
CC
V
7
.
2
=
2
1
T
A
e
r
u
t
a
r
e
p
m
e
T
g
n
it
a
r
e
p
O
r
i
A
-
e
e
r
F
-
0
4
5
8
+
C
/t
V
e
t
a
R
e
g
d
E
t
u
p
n
I
V
,
V
0
.
2
-
V
8
.
0
=
V
CC
V
0
.
3
=
0
0
1
V
/
s
n
Storage Temperature ............................................................. 65C to +150C
Ambient Temperature with Power Applied ............................ 40C to +85C
Supply Voltage to Ground Potential (Inputs & Vcc Only) ......0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) ..0.5V to +7.0V
DC Input Voltage ....................................................................0.5V to +7.0V
DC Output Current .............................................................................. 120 mA
Power Dissipation .................................................................................... 1.0W
3
PS2100C 11/14/02
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PI74LCX373
3.3V, 8-Bit Transparent Latch
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 3.3V, +25C ambient.
3. Per TTL driven input; all other inputs at Vcc or GND.
s
r
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m
a
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P
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)
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G
I
H
c
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L
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t
n
a
r
a
u
G
0
.
2
--
--
V
V
IL
e
g
a
tl
o
V
W
O
L
t
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p
n
I
l
e
v
e
L
W
O
L
c
i
g
o
L
d
e
e
t
n
a
r
a
u
G
--
--
8
.
0
V
OH
e
g
a
tl
o
V
H
G
I
H
t
u
p
t
u
O
V
CC
6
.
3
-
7
.
2
=
I
OH
A
m
1
.
0
=
V
CC
2
.
0
-
--
--
V
CC
7
.
2
=
I
OH
A
m
2
1
=
2
.
2
--
--
V
CC
0
.
3
=
I
OH
A
m
8
1
=
4
.
2
--
--
I
OH
A
m
4
2
=
2
.
2
--
--
V
OL
e
g
a
tl
o
V
W
O
L
t
u
p
t
u
O
V
CC
6
.
3
-
7
.
2
=
I
OL
A
m
1
.
0
=
--
--
2
.
0
V
CC
7
.
2
=
I
OL
A
m
2
1
=
--
--
4
.
0
V
CC
0
.
3
=
I
OL
A
m
6
1
=
--
--
4
.
0
I
OL
A
m
4
2
=
--
--
5
5
.
0
V
IK
e
g
a
tl
o
V
e
d
o
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D
p
m
a
l
C
V
CC
,.
n
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M
=
I
IN
A
m
8
1
=
--
-
7
.
0
-
2
.
1
I
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t
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r
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k
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L
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p
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I
0
V
I
V
5
.
5
6
.
3
-
7
.
2
=
c
c
V
--
--
5
A
I
OZ
e
g
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k
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L
t
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p
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S
-
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T
0
V
O
V
5
.
5
V
I
V
=
IH
V
r
o
IL
V
CC
6
.
3
-
7
.
2
=
--
--
5
I
OFF
e
l
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n
w
o
D
r
e
w
o
P
V
CC
,
V
0
=
V
IN
V
r
o
OUT
V
5
.
5
--
--
0
1
I
CC
y
l
p
p
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w
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P
t
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Q
t
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u
C
V
CC
.
x
a
M
=
V
IN
V
r
o
D
N
G
=
CC
1
.
0
0
1
I
CC
y
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V
CC
.
x
a
M
=
V
IN
V
=
CC
V
6
.
0
)
3
(
0
0
5
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V
CC
V
,
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p
O
=
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r
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0
=
CC
7
F
p
C
OUT
e
c
n
a
ti
c
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p
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C
t
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p
t
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CC
V
,
V
3
.
3
=
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V
r
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V
0
=
CC
8
C
PD
e
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ti
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V
CC
V
,
V
3
.
3
=
I
V
r
o
V
0
=
CC
,
z
H
M
0
1
=
F
5
2
Capacitance
DC Electrical Characteristics
(Over the Operating Range, T
A
=
-
40C to +85C, V
CC
= 2.7V to 3.6V)
4
PS2100C 11/14/02
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PI74LCX373
3.3V, 8-Bit Transparent Latch
Switching Characteristics over Operating Range
Note:
1. Skew between any two outputs, of the same package, switching in the same direction.
Dynamic Switching Characteristics
(T
A
= +25C)
Note:
1. Measured with n1 outputs switching from High-to-Low or Low-to-High. The remaining output is measured in the LOW state.
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3
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3
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CC
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7
.
2
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5
PS2100C 11/14/02
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PI74LCX373
3.3V, 8-Bit Transparent Latch
20-Pin 173 Mil-Wide Plastic TSSOP (L) Package
.252
.260
.047
1.20
.002
.006
SEATING
PLANE
.0256
BSC
.018
.030
.004
.008
.238
.269
1
20
.169
.177
X.XX
X.XX
DENOTES CONTROLLING
DIMENSIONS IN MILLIMETERS
0.05
0.15
6.1
6.7
0.45
0.75
0.09
0.20
4.3
4.5
6.4
6.6
0.65
0.19
0.30
.007
.012
Max
20-Pin 209 Mil-Wide Plastic SSOP (H) Package
.272
.295
.078
.002
SEATING
PLANE
.0098
Max.
.0256
BSC
.022
.037
.004
.009
.291
.322
1
20
.197
.220
0.25
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
0.050
7.40
8.20
0.55
0.95
0.09
0.25
5.00
5.60
2.00
6.90
7.50
0.65
Max
Min
6
PS2100C 11/14/02
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PI74LCX373
3.3V, 8-Bit Transparent Latch
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
20-Pin 150 Mil-Wide Plastic QSOP (Q) Package
.337
.344
.053
.069
.004
.010
SEATING
PLANE
.025
BSC
.007
.010
.228
.244
.150
.157
1
20
.016
.050
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
0.635
8.56
8.74
1.35
1.75
5.79
6.19
0.41
1.27
0.101
0.254
.008
.012
0.203
0.305
3.81
3.99
0.178
0.254
.058
1.47
.015 x 45
0.38
REF
Detail A
Detail A
.008
0.20
MIN.
Guage Plane
.010
0.254
.041
1.04
REF
.016
.035
0.41
0.89
0-6
.008
.013
0.20
0.33
SEATING
PLANE
.050
BSC
1
20
0-8
.2914
.2992
X.XX
X.XX
DENOTES CONTROLLING
DIMENSIONS IN MILLIMETERS
7.40
7.60
.496
.511
12.60
12.99
1.27
.0926
.1043
2.35
2.65
.394
.419
10.00
10.65
.0040
.0118
0.10
0.30
.013
.020
0.33
0.51
.010
.029
0.254
0.737
.0091
.0125
0.23
0.32
0.41
1.27
.016
.050
x 45
.020
.030
0.508
0.762
REF
e
d
o
C
g
n
i
r
e
d
r
O
e
p
y
T
e
g
a
k
c
a
P
H
3
7
3
X
C
L
4
7
I
P
P
O
S
S
c
it
s
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20-Pin 300 Mil-Wide Plastic SOIC (S) Package
Ordering Information
PDF 
ZIP