Block Diagram
D
0
CP
CP
Q
D
CP
Q
D
CP
Q
D
CP
Q
D
CP
Q
D
CP
Q
D
CP
Q
D
CP
Q
D
D
1
D
2
D
3
D
4
D
5
D
6
D
7
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PI74FCT374T
PI74FCT574T
Fast CMOS Octal D Registers (3-State)
Features:
• Pin compatible with bipolar FAST™ 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: –40°C to +85°C
• Packaging (Pb-free & Green available):
– 20-pin 173-mil wide plastic TSSOP (L)
– 20-pin 150-mil wide plastic QSOP (Q)
– 20-pin 150-mil wide plastic TQSOP (R)
– 20-pin 209-mil wide plastic SSOP (H)
– 20-pin 300-mil wide plastic SOIC (S)
Description:
Pericom Semiconductor’s PI74FCT374T/574T 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.
OE
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
PI74FCT374 Pin Configuration
OE
O
0
D
0
D
1
O
1
O
2
D
2
D
3
O
3
GND
1
20
2
19
3
20-PIN
18
4
L20
17
5
H20
16
Q20
15
6
S20
14
7
8
13
9
12
10
11
PI74FCT574 Pin Configuration
Vcc
O
7
D
7
D
6
O
6
O
5
D
5
D
4
O
4
CP
OE
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
GND
1
20
2
19
20-PIN
18
3
L20
17
4
Q20
16
5
S20
15
6
7
14
8
13
9
12
10
11
Vcc
O
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
CP
1
PS2016C
10/01/04
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PI74FCT374T
PI74FCT574T
Octal D Registers (3-State)
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ................................................................. –65°C to +150°C
Ambient Temperature with Power Applied ................................. -40°C to +85°C
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.
Truth Table
(1)
Function
High-Z
Load Register
OE
H
H
L
L
H
H
Inputs
CP
L
H
↑
↑
↑
↑
D
N
X
X
L
H
L
H
Outputs
O
N
Z
Z
L
H
Z
Z
Internal
Q
N
NC
NC
H
L
H
L
Pin Description
Pin Name
OE
CP
D
0
-D
7
O
0
-O
7
O
0
-O
7
GND
V
CC
Description
Output Enable Input (Active LOW)
Clock Pulse for the register. Enters data on
LOW-to-HIGH transition
Data Inputs
3-State Outputs (true)
3-State Outputs (inverted)
Ground
Power
1.
H = High Voltage Level
L = Low Voltage Level
X = Don’t Care
Z = High Impedance
NC = No Change
↑=
LOW-to-HIGH transition
2
PS2016C
10/01/04
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, +25°C 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.
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PI74FCT374T
PI74FCT574T
Octal D Registers (3-State)
DC Electrical Characteristics
(Over the Operating Range, T
A
= –40°C to +85°C, V
CC
= 5.0V ± 5%)
Parameters Description
V
OH
V
OL
V
OL
V
IH
V
IL
I
IH
I
IL
I
OZH
I
OZL
V
IK
I
OFF
I
OS
V
H
Output HIGH Voltage
Output LOW Current
Output LOW Current
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance
Output Current
Clamp Diode Voltage
Power Down Disable
Short Circuit Current
Input Hysteresis
V
CC
= Min., I
IN
= –18 mA
V
CC
= GND, V
OUT
= 4.5V
V
CC
= Max.
(3)
, V
OUT
= GND
—
–60
Test Conditions
(1)
V
CC
= Min., V
IN
= V
IH
or V
IL
V
CC
= Min., V
IN
= V
IH
or V
IL
V
CC
= Min., V
IN
= V
IH
or V
IL
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max.
V
CC
= Max.
V
CC
= M
AX
.
V
IN
= V
CC
V
IN
= GND
V
OUT
= 2.7V
V
OUT
= 0.5V
–0.7
—
–120
200
I
OH
= –15.0 mA
I
OL
= 64 mA
I
OL
= 12 mA (25Ω Series)
2.0
0.8
1
–1
1
–1
–1.2
100
Min. Typ
(2)
Max. Units
2.4
3.0
0.3
0.3
0.55
0.50
V
V
V
V
V
µA
µA
µA
µA
V
µA
mA
mV
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(4)
C
IN
C
OUT
Description
Input Capacitance
Output Capacitance
Test Conditions
V
IN
= 0V
V
OUT
= 0V
Typ
6
8
Max.
10
12
Units
pF
pF
3
PS2016C
10/01/04
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PI74FCT374T
PI74FCT574T
Octal D Registers (3-State)
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
I
CCD
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
(4)
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.,
Outputs Open
OE = GND
One Input Toggling
50% Duty Cycle
V
CC
= Max.,
Outputs Open
f
CP
= 10 MH
Z
50% Duty Cycle
OE = GND
f
I
= 5 MH
Z
One Bit Toggling
V
CC
= Max.,
Outputs Open
f
CP
= 10 MH
Z
50% Duty Cycle
OE = GND
Eight Bits Toggling
f
I
= 2.5 MH
Z
50% Duty Cycle
Test Conditions
(1)
V
IN
= GND or V
CC
V
IN
= 3.4V
(3)
V
IN
= V
CC
V
IN
= GND
Min.
Typ
(2)
0.1
0.5
0.15
Max.
500
2.0
0.25
Units
µA
mA
mA/
MHz
I
C
Total Power Supply
Current
(6)
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
1.5
2.0
3.5
(5)
5.5
(5)
mA
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
3.8
6.0
7.3
(5)
16.3
(5)
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, +25°C 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.
4
PS2016C
10/01/04
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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PI74FCT374T
PI74FCT574T
Octal D Registers (3-State)
PI74FCT374T Switching Characteristics over Operating Range
374TT
Com.
374AT
Com.
Min
Max
374CT
Com.
Min
Max
374DT
Com.
Min
Max Units
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SU
t
H
t
W
Description
Propagation Delay
CP to O
N
Output Enable Time
OE to O
N
Output Disable Time
(3)
OE to O
N
Setup Time HIGH or
LOW, D
N
to CP
Hold Time HIGH or
LOW, D
N
to CP
CP Pulse Width
(3)
HIGH or LOW
Conditions
(1)
C
L
= 50pF
R
L
= 500Ω
Min
Max
2.0
1.5
1.5
2.0
1.5
7.0
10.0
12.5
8.0
—
—
—
2.0
1.5
1.5
2.0
1.5
5.0
6.5
6.5
5.5
—
—
—
2.0
1.5
1.5
2.0
1.5
5.0
5.2
5.5
5.0
—
—
—
2.0
1.5
1.5
2.0
1.0
3.0
4.5
5.5
5.0
—
—
—
ns
ns
ns
ns
ns
ns
PI74FCT574T Switching Characteristics over Operating Range
574T
Com.
574AT
Com.
Min
Max
Max
Min
574T
Com.
Max
574DT
Com.
Min
Max
Unit
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SU
t
H
t
W
Description
Propagation Delay
CP to O
N
Output Enable Time
OE to O
N
Output Disable Time
(3)
OE to O
N
Setup Time HIGH or
LOW, D
N
to CP
Hold Time HIGH or
LOW, D
N
to CP
CP Pulse Width
(3)
HIGH or LOW
Conditions
(1)
C
L
= 50 pF
R
L
= 500Ω
Min
2.0
1.5
1.5
2.0
1.5
7.0
8.5
10.0
6.5
—
—
—
2.0
1.5
1.5
2.0
1.5
5.0
6.5
6.5
5.5
—
—
—
2.0
1.5
1.5
2.0
1.5
5.0
5.2
5.5
5.0
—
—
—
2.0
1.5
1.5
2.0
1.0
3.0
4.5
5.5
5.0
—
—
—
ns
ns
ns
ns
ns
ns
5
PS2016C
10/01/04
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