1
PS2016A 03/11/96
PI74FCT374T/534T/574T
(25
Series) P174FCT2374T/2574T
OCTAL D REGISTERS (3-STATE)
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Product Description:
Pericom Semiconductor's PI74FCT series of logic circuits are pro-
duced in the Company's advanced 0.6/0.8 micron CMOS technology,
achieving industry leading speed grades. All PI74FCT2XXX devices
have a built-in 25 ohm series resistor on all outputs to reduce noise
resulting from reflections, thus eliminating the need for an external
terminating resistor.
The PI74FCT374T/534T/574T and P174FCT2374T/2574T are
8-bit wide octal registers designed with eight D-type flip-flops with
a buffered common clock and buffered 3-state outputs. When
output enable (OE) is LOW, the outputs are enabled. When OE is
HIGH, the outputs are in the high impedance state. Input data
meeting the setup and hold time requirements of the D inputs is
transferred to the O outputs on the LOW-to-HIGH transition of the
clock input.
Device models available upon request.
PI74FCT374/2374T and PI74FCT574/2574T Logic Block Diagram
PI74FCT534T Logic Block Diagram
Product Features:
PI74FCT374/534/574/2374/2574T is pin compatible with bipolar
FASTTM Series at a higher speed and lower power
consumption
25
series resistor on all outputs (FCT2XXX only)
TTL input and output levels
Low ground bounce outputs
Extremely low static power
Hysteresis on all inputs
Industrial operating temperature range: 40C to +85C
Packages available:
20-pin 173 mil wide plastic TSSOP (L)
20-pin 300 mil wide plastic DIP (P)
20-pin 150 mil wide plastic QSOP (Q)
20-pin 150 mil wide plastic TQSOP (R)
20-pin 300 mil wide plastic SOIC (S)
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Fast CMOS Octal D
Registers (3-State)
PI74FCT374T/534T/574T
(25
Series) PI74FCT2374T/2574T
D
Q
D
0
O
0
CP
CP
OE
D
Q
D
1
O
1
CP
D
Q
D
2
O
2
CP
D
Q
D
3
O
3
CP
D
Q
D
4
O
4
CP
D
Q
D
5
O
5
CP
D
Q
D
6
O
6
CP
D
Q
D
7
O
7
CP
D
Q
D
0
O
0
CP
CP
OE
D
Q
D
1
O
1
CP
D
Q
D
2
O
2
CP
D
Q
D
3
O
3
CP
D
Q
D
4
O
4
CP
D
Q
D
5
O
5
CP
D
Q
D
6
O
6
CP
D
Q
D
7
O
7
CP
2
PS2016A 03/11/96
PI74FCT374T/534T/574T
(25
Series) P174FCT2374T/2574T
OCTAL D REGISTERS (3-STATE)
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Inputs
Outputs
Internal
Function
OE
CP
D
N
O
N
Q
N
High-Z
H
L
X
Z
NC
H
H
X
Z
NC
Load Register
L
L
H
L
L
H
L
H
H
L
Z
L
H
H
Z
H
PI74FCT534T Truth Table
(1)
Product Pin Description
PI74FCT374/2374T Product Pin Configuration
PI74FCT534T Product Pin Configuration
PI74FCT574/2574T Product Pin Configuration
Inputs
Outputs
Internal
Function
OE
CP
D
N
O
N
Q
N
High-Z
H
L
X
Z
NC
H
H
X
Z
NC
Load Register
L
L
L
H
L
H
H
L
H
L
Z
H
H
H
Z
L
PI74FCT374/574/2374/2574T Truth Table
(1)
1.
H = High Voltage Level
L = Low Voltage Level
X = Don't Care
Z = High Impedance
NC = No Change
= LOW-to-HIGH transition
Pin Name
Description
OE
Output Enable Input (Active LOW)
CP
Clock Pulse for the register. Enters data on
LOW-to-HIGH transition
D
0
-D
7
Data Inputs
O
0
-O
7
3-State Outputs (true)
O
0
-O
7
3-State Outputs (inverted)
GND
Ground
V
CC
Power
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
CP
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
CP
20-PIN
L20
P20
Q20
R20
S20
20-PIN
L20
P20
Q20
R20
S20
20-PIN
L20
P20
Q20
R20
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
CP
3
PS2016A 03/11/96
PI74FCT374T/534T/574T
(25
Series) P174FCT2374T/2574T
OCTAL D REGISTERS (3-STATE)
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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
MAXIMUM 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.
4
PS2016A 03/11/96
PI74FCT374T/534T/574T
(25
Series) P174FCT2374T/2574T
OCTAL D REGISTERS (3-STATE)
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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
One Input Toggling
50% Duty Cycle
I
C
Total Power Supply
V
CC
= Max.,
V
IN
= V
CC
1.5
3.5
(5)
mA
Current
(6)
Outputs Open
V
IN
= GND
f
CP
= 10 MH
Z
50% Duty Cycle
V
IN
= 3.4V
2.0
5.5
(5)
OE = GND
V
IN
= GND
f
I
= 5 MH
Z
One Bit Toggling
V
CC
= Max.,
V
IN
= V
CC
3.8
7.3
(5)
Outputs Open
V
IN
= GND
f
CP
= 10 MH
Z
50% Duty Cycle
V
IN
= 3.4V
6.0
16.3
(5)
OE = GND
V
IN
= GND
Eight Bits Toggling
f
I
= 2.5 MH
Z
50% Duty Cycle
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
N
I
)
I
CC
= Quiescent Current
I
CC
= Power Supply Current for a TTL High Input (V
IN
= 3.4 V)
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.
5
PS2016A 03/11/96
PI74FCT374T/534T/574T
(25
Series) P174FCT2374T/2574T
OCTAL D REGISTERS (3-STATE)
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PI74FCT374/2374T Switching Characteristics over Operating Range
374T/2374T
374AT/2374AT
374CT/2374CT
374DT
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
2.0
10.0
2.0
6.5
2.0
5.2
2.0
4.5
ns
t
PHL
CP to O
N
R
L
= 500
t
PZH
Output Enable Time
1.5
12.5
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
8.0
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 CP
t
H
Hold Time HIGH or
1.5
--
1.5
--
1.5
--
1.0
--
ns
LOW, D
N
to CP
t
W
CP Pulse Width
(3)
7.0
--
5.0
--
5.0
--
3.0
--
ns
HIGH or LOW
PI74FCT534T Switching Characteristics over Operating Range
534T
534AT
534CT
534DT
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
2.0
10.0
2.0
6.5
2.0
5.2
2.0
4.5
ns
t
PHL
CP to O
N
R
L
= 500
t
PZH
Output Enable Time
1.5
12.5
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
8.0
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 CP
t
H
Hold Time HIGH or
1.5
--
1.5
--
1.5
--
1.0
--
ns
LOW, D
N
to CP
t
W
CP Pulse Width
(3)
7.0
--
5.0
--
5.0
--
3.0
--
ns
HIGH or LOW
Notes:
1. See test circuit and wave forms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not production tested.
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