21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT280T
9-BIT PARITY GENERATOR/CHECKER
PI74FCT280T
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
Product Features:
• PI74FCT280T is pin compatible with bipolar FAST™ 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: –40°C to +85°C
• Packages available:
– 14-pin 150 mil wide SOIC (W)
– 16-pin 150 mil wide QSOP (Q)
Fast CMOS
9-Bit Parity Generator/Checker
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
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
Σe
Σo
I
8
1
PS2014A 03/11/96
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT280T
9-BIT PARITY GENERATOR/CHECKER
PI74FCT280T 14-Pin SOIC Configuration
I
6
I
7
NC
I
8
Σe
Σo
GND
1
2
3
4
5
6
7
14
13
Product Pin Description
Pin Name
I
8
–I
0
Σe
Σo
GND
V
CC
Description
Data In
Even Parity Out
Odd Parity Out
Ground
Power
14-PIN
12
W14
11
10
9
8
V
CC
I
5
I
4
I
3
I
2
I
1
I
0
Truth Table
(1)
PI74FCT280T 16-Pin QSOP Configuration
Function
I
6
I
7
NC
I
8
Σe
Σo
NC
GND
1
2
3
4
5
6
7
8
16
15
14
Inputs
Outputs
I
8
-I
0
No. of Bits at TTL High
= 0, 2, 4, 6, 8
No. of Bits at TTL High
= 1, 3, 5, 7, 9
16-PIN
13
Q16
12
11
10
9
V
CC
I
5
I
4
I
3
I
2
I
1
I
0
NC
Even Parity
Odd Parity
Σ
e
H
L
Σ
o
L
H
Note:
1. H = High Voltage Level
L = Low Voltage Level
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 +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
= 25°C, f = 1 MHz)
Parameters
(1)
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
Notes:
1. This parameter is determined by device characterization but is not production tested.
2
PS2014A 03/11/96
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT280T
9-BIT PARITY GENERATOR/CHECKER
DC Electrical Characteristics
(Over the Operating Range, T
A
= –40°C to +85°C, V
CC
= 5V ± 5%)
Parameters Description
V
OH
V
OL
V
IH
V
IL
I
IH
I
IL
V
IK
I
OS
I
OFF
V
H
Output HIGH Voltage
Output LOW Current
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
Clamp Diode Voltage
Short Circuit Current
Power Down Disable
Input Hysteresis
Test Conditions
(1)
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
= Min., I
IN
= –18 mA
V
CC
= Max.
(3)
, V
OUT
= GND
V
CC
= GND, V
OUT
= 4.5V
–60
—
V
IN
= V
CC
V
IN
= GND
–0.7
–120
—
200
100
I
OH
= –15.0 mA
I
OL
= 48 mA
2.0
0.8
1
–1
–1.2
Min
2.4
Typ
(2)
3.0
0.3
0.50
Max
Units
V
V
V
V
µA
µA
V
mA
µA
mV
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, +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.
Switching Characteristics over Operating Range
280T
Com.
Min Max
3.0
3.0
10.0
10.0
280AT
Com.
Min Max
3.0
3.0
7.5
7.5
280BT
Com.
Min Max
3.0
3.0
6.3
6.3
280CT
Com.
Min Max
3.0
3.0
5.3
5.3
Parameters Description
t
PHLE
t
PLHE
t
PHLO
t
PLHO
Conditions
(1)
Unit
ns
ns
Propagation Delay C
L
= 50 pF
I0 – I8 to
∑even
R
L
= 500Ω
Propagation Delay
I0 – I8 to
∑odd
Notes:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3
PS2014A 03/11/96
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT280T
9-BIT PARITY GENERATOR/CHECKER
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
One Input Toggling
50% Duty Cycle
V
CC
= Max.,
Outputs Open
f
CP
= 10 MH
Z
50% Duty Cycle
f
I
= 5 MH
Z
One Bit Toggling
V
CC
= Max.,
Outputs Open
f
CP
= 10 MH
Z
50% Duty Cycle
Nine 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
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
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
1.7
4.0
(5)
6.0
(5)
mA
2.2
4.0
7.8
(5)
16.8
(5)
6.2
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, +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
= 3.4V)
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
4
PS2014A 03/11/96
京公网安备 11010802033920号
EEWORLD
