PI74FCT280T
9-BIT PARITY GENERATOR/CHECKER
1
PS2014A 03/11/96
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Fast CMOS
9-Bit Parity Generator/Checker
PI74FCT280T
Product Description:
Pericom Semiconductor's PI74FCT series of logic circuits are
produced in the Company's advanced 0.8 micron CMOS technology,
achieving industry leading speed grades.
The PI74FCT280T is a high-speed CMOS TTL-compatible 9-bit
parity generator-checkers. Both odd and even parity outputs are
available for generating or checking odd or even parity.
Logic Block Diagram
Product Features:
PI74FCT280T is pin compatible with bipolar FASTTM Series at
a higher speed and lower power consumption
TTL input and output levels
Extremely low static power
Hysteresis on all inputs
Industrial operating temperature range: 40C to +85C
Packages available:
14-pin 150 mil wide SOIC (W)
16-pin 150 mil wide QSOP (Q)
e
o
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
I
8
PI74FCT280T
9-BIT PARITY GENERATOR/CHECKER
2
PS2014A 03/11/96
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PI74FCT280T 14-Pin SOIC Configuration
Inputs
Outputs
Function
I
8
-I
0
e
o
Even Parity
No. of Bits at TTL High
H
L
= 0, 2, 4, 6, 8
Odd Parity
No. of Bits at TTL High
L
H
= 1, 3, 5, 7, 9
Truth Table
(1)
Note:
1.
H = High Voltage Level
L = Low Voltage Level
Pin Name
Description
I
8
I
0
Data In
e
Even Parity Out
o
Odd Parity Out
GND
Ground
V
CC
Power
Product Pin Description
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 +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.
Capacitance
(T
A
= 25C, f = 1 MHz)
Parameters
(1)
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. This parameter is determined by device characterization but is not production tested.
PI74FCT280T 16-Pin QSOP Configuration
V
CC
1
I
6
14
I
5
2
I
7
13
I
4
3
NC
12
I
3
4
I
8
11
I
2
5
e
10
I
1
6
o
9
I
0
7
GND
8
14-PIN
W14
V
CC
1
I
6
16
I
5
2
I
7
15
I
4
3
NC
14
I
3
4
I
8
13
I
2
5
e
12
I
1
6
o
11
I
0
7
NC
10
NC
8
GND
9
16-PIN
Q16
PI74FCT280T
9-BIT PARITY GENERATOR/CHECKER
3
PS2014A 03/11/96
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DC Electrical Characteristics
(Over the Operating Range, T
A
= 40C to +85C, V
CC
= 5V 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
= 48 mA
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
V
IK
Clamp Diode Voltage
V
CC
= Min., I
IN
= 18 mA
0.7
1.2
V
I
OS
Short Circuit Current
V
CC
= Max.
(3)
, V
OUT
= GND
60
120
mA
I
OFF
Power Down Disable
V
CC
= GND, V
OUT
= 4.5V
--
--
100
A
V
H
Input Hysteresis
200
mV
280T
280AT
280BT
280CT
Com.
Com.
Com.
Com.
Parameters Description
Conditions
(1)
Min
Max
Min
Max
Min
Max
Min
Max
Unit
t
PHLE
Propagation Delay C
L
= 50 pF
3.0
10.0
3.0
7.5
3.0
6.3
3.0
5.3
ns
t
PLHE
I0 I8 to
even
R
L
= 500
t
PHLO
Propagation Delay
3.0
10.0
3.0
7.5
3.0
6.3
3.0
5.3
ns
t
PLHO
I0 I8 to
odd
Notes:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for 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.
Switching Characteristics over Operating Range
PI74FCT280T
9-BIT PARITY GENERATOR/CHECKER
4
PS2014A 03/11/96
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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
0.1
500
A
Supply Current
or V
CC
I
CC
Supply Current per
V
CC
= Max.
V
IN
= 3.4V
(3)
2.0
mA
Input @ TTL HIGH
I
CCD
Supply Current per
V
CC
= Max.,
V
IN
= V
CC
0.25
mA/
Input per MHz
(4)
Outputs Open
V
IN
= GND
MHz
One Input Toggling
50% Duty Cycle
I
C
Total Power Supply
V
CC
= Max.,
V
IN
= V
CC
1.7
4.0
(5)
mA
Current
(6)
Outputs Open
V
IN
= GND
f
CP
= 10 MH
Z
50% Duty Cycle
V
IN
= 3.4V
2.2
6.0
(5)
f
I
= 5 MH
Z
V
IN
= GND
One Bit Toggling
V
CC
= Max.,
V
IN
= V
CC
4.0
7.8
(5)
Outputs Open
V
IN
= GND
f
CP
= 10 MH
Z
50% Duty Cycle
V
IN
= 3.4V
6.2
16.8
(5)
Nine Bits Toggling
V
IN
= GND
f
I
= 2.5 MH
Z
50% Duty Cycle
Notes:
1. For Max. or Min. conditions, 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
= 3.4V)
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.
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
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