1
PS2015B 10/06/04
Block Diagram
Description:
Pericom Semiconductor's PI74FCT373T and PI74FCT 573T are
8-bit wide octal transparent latches designed with 3-state outputs
and are 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.
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
PI74FCT373T
PI74FCT573T
Octal Transparent Latches
Fast CMOS Octal
Transparent Latches
Features:
PI74FCT373/573T are pin compatible with bipolar FASTTM
Series at a higher speed and lower power consumption
TTL input and output levels
Low ground bounce outputs
Extremely low static power
Hysteresis on all inputs
Industrial operating temperature range: 40C to +85C
Device models available upon request
Packaging:
20-pin TSSOP (L)
20-pin SSOP (H)
20-pin QSOP (Q)
20-pin SOIC (S)
O
D
G
OE
LE
D
0
O
0
O
D
G
D
1
O
1
O
D
G
D
2
O
2
O
D
G
D
3
O
3
O
D
G
D
4
O
4
O
D
G
D
5
O
5
O
D
G
D
6
O
6
O
D
G
D
7
O
7
PI74FCT373T
PI74FCT573T
OCTAL TRANSPARENT LATCHES
2
PS2015B 10/06/04
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
Inputs
Outputs
D
N
LE
OE
O
N
H
H
L
H
L
H
L
L
X
X
H
Z
Truth Table
(1)
1.
H = High Voltage Level
L = Low Voltage Level
X = Don't Care
Z = High Impedance
Pin Name
Description
OE
Output Enable Input (Active LOW)
LE
Latch Enable Input (Active HIGH)
D
0
-D
7
Data Inputs
O
0
-O
7
3-State Outputs
O
0
-O
7
Complementary 3-State Outputs
GND
Ground
V
CC
Power
Pin Description
PI74FCT373 Pin Configuration
PI74FCT573 Pin Configuration
20-PIN
L20
P20
Q20
S20
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
O
0
D
0
D
1
O
1
O
2
D
2
D
3
O
3
GND
Vcc
O
7
D
7
D
6
O
6
O
5
D
5
D
4
O
4
LE
20-PIN
L20
P20
Q20
S20
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
OE
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
GND
Vcc
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
LE
PI74FCT373T
PI74FCT573T
OCTAL TRANSPARENT LATCHES
3
PS2015B 10/06/04
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
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 ......................................................................................... 0.5W
Note:
Stresses greater than those listed under MAXI-
MUM RATINGS may cause permanent damage to
the device. This is a stress rating only and functional
operation 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.
DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 5.0V 5%)
Parameters Description
Test Conditions
(1)
Min. Typ
(2)
Max. Units
V
OH
Output HIGH Voltage V
CC
= Min., V
IN
= V
IH
or V
IL
I
OH
= 15.0 mA
2.4
3.0
V
V
OL
Output LOW Current
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OL
= 64 mA
0.3
0.55
V
V
OL
Output LOW Current
V
CC
= Min., V
IN
= V
IH
or V
IL
I
OL
= 12 mA (25
Series)
0.3
0.50
V
V
IH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
V
V
IL
Input LOW Voltage
Guaranteed Logic LOW Level
0.8
V
I
IH
Input HIGH Current
V
CC
= Max.
V
IN
= V
CC
1
A
I
IL
Input LOW Current
V
CC
= Max.
V
IN
= GND
1
A
I
OZH
High Impedance
V
CC
= M
AX
.
V
OUT
= 2.7V
1
A
I
OZL
Output Current
V
OUT
= 0.5V
1
A
V
IK
Clamp Diode Voltage V
CC
= Min., I
IN
= 18 mA
0.7
1.2
V
I
OFF
Power Down Disable
V
CC
= GND, V
OUT
= 4.5V
--
--
100
A
I
OS
Short Circuit Current
V
CC
= Max.
(3)
, V
OUT
= GND
60
120
mA
V
H
Input Hysteresis
200
mV
Capacitance
(T
A
= 25C, f = 1 MHz)
Parameters
(4)
Description
Test Conditions
Typ
Max.
Units
C
IN
Input Capacitance
V
IN
= 0V
6
10
pF
C
OUT
Output Capacitance
V
OUT
= 0V
8
12
pF
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at Vcc = 5.0V, +25C ambient and maximum loading.
3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. This parameter is determined by device characterization but is not production tested.
PI74FCT373T
PI74FCT573T
OCTAL TRANSPARENT LATCHES
4
PS2015B 10/06/04
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
Power Supply Characteristics
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
I
CC
Quiescent Power
V
CC
= Max.
V
IN
= GND or V
CC
0.1
500
A
Supply Current
I
CC
Supply Current per
V
CC
= Max.,
V
IN
= 3.4V
(3)
0.5
2.0
mA
Input @ TTL HIGH
I
CCD
Supply Current per
V
CC
= Max.,
V
IN
= V
CC
0.15
0.25
mA/
Input per MHz
(4)
Outputs Open
V
IN
= GND
MHz
OE = GND
LE = V
CC
One Bit Toggling
50% Duty Cycle
I
C
Total Power Supply
V
CC
= Max.,
V
IN
= V
CC
1.5
3.0
(5)
mA
Current
(6)
Outputs Open
V
IN
= GND
f
I
= 10 MH
Z
50% Duty Cycle
OE = GND
V
IN
= 3.4V
1.8
4.5
(5)
LE = V
CC
V
IN
= GND
One Bit Toggling
V
CC
= Max.,
V
IN
= V
CC
3.0
6.0
(5)
Outputs Open
V
IN
= GND
f
I
= 2.5 MH
Z
50% Duty Cycle
OE = GND
V
IN
= 3.4V
5.0
14.0
(5)
LE = V
CC
V
IN
= GND
Eight Bits Toggling
Notes:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 5.0V, +25C ambient.
3. Per TTL driven input (V
IN
= 3.4V); all other inputs at Vcc or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations.
5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested.
6. I
C
=I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
I
CC
D
H
N
T
+ I
CCD
(f
CP
/2 + f
I
Ni)
I
CC
= Quiescent Current
I
CC
= Power Supply Current for a TTL High Input (V
IN
= 3.4V)
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL Inputs at D
H
I
CCD
= Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
I
= Input Frequency
N
I
= Number of Inputs at f
I
All currents are in milliamps and all frequencies are in megahertz.
PI74FCT373T
PI74FCT573T
OCTAL TRANSPARENT LATCHES
5
PS2015B 10/06/04
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
PI74FCT373T Switching Characteristics over Operating Range
373T
373AT
373CT
373DT
Com.
Com.
Com.
Com.
Parameters
Description
Conditions
(1)
Min
Max
Min
Max
Min
Max
Min
Max
Unit
t
PLH
Propagation Delay
C
L
= 50 pF
1.5
8.0
1.5
5.2
1.5
4.2
1.5
3.8
ns
t
PHL
D
N
to O
N
R
L
= 500
t
PLH
Propagation Delay
2.0
13.0
2.0
8.5
2.0
5.5
1.5
4.9
ns
t
PHL
LE to O
N
t
PZH
Output Enable Time
1.5
12.0
1.5
6.5
1.5
5.5
1.5
5.5
ns
t
PZL
OE to O
N
t
PHZ
Output Disable Time
(3)
1.5
7.5
1.5
5.5
1.5
5.0
1.5
5.0
ns
t
PLZ
OE to O
N
t
SU
Setup Time HIGH or
2.0
--
2.0
--
2.0
--
2.0
--
ns
LOW, D
N
to LE
t
H
Hold Time HIGH or
1.5
--
1.5
--
1.5
--
1.5
--
ns
LOW, D
N
to LE
t
W
LE Pulse Width
(3)
6.0
--
5.0
--
5.0
--
4.0
--
ns
HIGH
Notes:
1. See test circuit and wave forms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter guaranteed but not production tested.
PI74FCT573T Switching Characteristics over Operating Range
573T
573AT
573CT
573DT
Com.
Com.
Com.
Com.
Parameters
Description
Conditions
(1)
Min
Max
Min
Max
Min
Max
Min
Max
Unit
t
PLH
Propagation Delay
C
L
= 50 pF
1.5
8.0
1.5
5.2
1.5
4.2
1.5
3.8
ns
t
PHL
D
N
to O
N
R
L
= 500
t
PLH
Propagation Delay
2.0
12.0
2.0
8.5
2.0
5.5
2.0
4.9
ns
t
PHL
LE to O
N
t
PZH
Output Enable Time
1.5
9.5
1.5
6.5
1.5
5.5
1.5
5.5
ns
t
PZL
OE to O
N
t
PHZ
Output Disable Time
(3)
1.5
6.5
1.5
5.5
1.5
5.0
1.5
5.0
ns
t
PLZ
OE to O
N
t
SU
Setup Time HIGH or
2.0
--
2.0
--
2.0
--
1.5
--
ns
LOW, D
N
to LE
t
H
Hold Time HIGH or
1.5
--
1.5
--
1.5
--
1.0
--
ns
LOW, D
N
to LE
t
W
LE Pulse Width
(3)
6.0
--
5.0
--
5.0
--
3.0
--
ns
HIGH
PI74FCT373T
PI74FCT573T
OCTAL TRANSPARENT LATCHES
6
PS2015B 10/06/04
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
Packaging Mechanical: 20-pin QSOP (Q)
Packaging Mechanical: 20-Pin TSSOP (L)
.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
.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
PI74FCT373T
PI74FCT573T
OCTAL TRANSPARENT LATCHES
7
PS2015B 10/06/04
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
Packaging Mechanical: 20-pin SOIC (S)
Packaging Mechanical: 20-Pin SSOP (H)
.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
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
PI74FCT373T
PI74FCT573T
OCTAL TRANSPARENT LATCHES
8
PS2015B 10/06/04
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
Pericom Semiconductor Corporation 1-800-435-2336 www.pericom.com
Notes:
1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
PI74FCT373T Ordering Information
Ordering Code
Package Code
Speed Grade
Package Type
PI74FCT373TL
L
Blank
20-pin TSSOP
PI74FCT373TQ
Q
Blank
20-pin QSOP
PI74FCT373TS
S
Blank
20-pin SOIC
PI74FCT373ATH
H
A
20-pin SSOP
PI74FCT373ATL
L
A
20-pin TSSOP
PI74FCT373ATS
S
A
20-pin SOIC
PI74FCT373ATQ
Q
A
20-pin QSOP
PI74FCT373CTH
H
C
20-pin SSOP
PI74FCT373CTL
L
C
20-pin TSSOP
PI74FCT373CTS
S
C
20-pin SOIC
PI74FCT373CTQ
Q
C
20-pin QSOP
PI74FCT373DTH
H
D
20-pin SSOP
PI74FCT373DTL
L
D
20-pin TSSOP
PI74FCT373DTQ
Q
D
20-pin QSOP
PI74FCT573T Ordering Information
Ordering Code
Package Code
Speed Grade
Package Type
PI74FCT573TQ
Q
Blank
20-pin QSOP
PI74FCT573TS
S
Blank
20-pin SOIC
PI74FCT573ATH
H
A
20-pin SSOP
PI74FCT573ATL
L
A
20-pin TSSOP
PI74FCT573ATS
S
A
20-pin SOIC
PI74FCT573ATQ
Q
A
20-pin QSOP
PI74FCT573CTH
H
C
20-pin SSOP
PI74FCT573CTL
L
C
20-pin TSSOP
PI74FCT573CTS
S
C
20-pin SOIC
PI74FCT573CTQ
Q
C
20-pin QSOP
PI74FCT573DTQ
Q
D
20-pin QSOP
PDF 
ZIP