21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT139/239T
DUAL 1-OF-4 DECODER
PI74FCT139T
PI74FCT239T
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
Fast CMOS Dual 1-of-4 Decoder
Product Features:
• PI74FCT139/239T 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:
– 16-pin 150 mil wide plastic QSOP (Q)
– 16-pin 300 mil wide plastic SOIC (S)
– 16-pin 150 mil wide plastic SOIC (W)
Product Description:
Pericom Semiconductor’s PI74FCT series of logic circuits are pro-
duced in the Company’s advanced 0.8 micron CMOS technology,
achieving industry leading speed grades.
These are high-speed two independent 1-of-4 decoders. Each
decoder accepts two binary weighted inputs (A
0
, A
1
) and gives four
mutually exclusive active LOW outputs (O
0
-O
3:
PI74FCT139T) or
active HIGH outputs (O0-O3: PI74FCT239T). There is one active
LOW enable (E) for each decoder. For the PI74FCT139T all
outputs are forced HIGH, and for the PI74FCT239T all outputs are
forced LOW when E is HIGH.
Logic Block Diagram
E
a
A
0a
A
1a
E
b
A
0b
A
1b
O
0a
O
1a
O
2a
O
3a
O
0b
O
1b
O
2b
O
3b
PI74FCT139T function shown.
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PS2006B 11/11/97
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PI74FCT139/239T
DUAL 1-OF-4 DECODER
PI74FCT139T Product Pin Configuration
PI74FCT139T Product Pin Description
Pin Name
A
0
, A
1
E
O
0
-O
3
Description
Address Inputs
Enable Input (Active LOW)
Outputs (Active LOW)
E
a
A
0a
A
1a
O
0a
O
1a
O
2a
O
3a
GND
1
2
3
4
5
6
7
8
16
15
16-PIN
Q16
S16
W16
14
13
12
11
10
9
V
CC
E
b
A
0b
A
1b
O
0b
O
1b
O
2b
O
3b
PI74FCT139T Truth Table
(1)
Inputs
E
H
L
L
L
L
Note:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
Outputs
A
1
X
L
L
H
H
O
0
H
L
H
H
H
O
1
H
H
L
H
H
O
2
H
H
H
L
H
O
3
H
H
H
H
L
A
0
X
L
H
L
H
PI74FCT239T Product Pin Configuration
E
a
A
0a
A
1a
O
0a
O
1a
O
2a
O
3a
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
PI74FCT239T Truth Table
(1)
E
H
L
L
L
L
Note:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
16-PIN
Q16
S16
W16
V
CC
E
b
A
0b
A
1b
O
0b
O
1b
O
2b
O
3b
Inputs
A
0
X
L
H
L
H
A
1
X
L
L
H
H
O
0
L
H
L
L
L
Outputs
O
1
O
2
L
L
L
L
H
L
L
H
L
L
O
3
L
L
L
L
H
PI74FCT239T Product Pin Description
Pin Name
A
0
, A
1
E
O
0
-O
3
Description
Address Inputs
Enable Input (Active LOW)
Outputs (Active HIGH)
2
PS2006B 11/11/97
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PI74FCT139/239T
DUAL 1-OF-4 DECODER
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
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
= –40°C to +85°C, V
CC
= 5.0V ± 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
I
OH
= –15.0 mA
I
OL
= 48 mA
2.0
0.8
1
–1
–1.2
–225
100
Min.
2.4
Typ
(2)
3.0
0.3
0.50
Max.
Units
V
V
V
V
µA
µA
V
mA
µA
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
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.
3
PS2006B 11/11/97
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PI74FCT139/239T
DUAL 1-OF-4 DECODER
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
One Bit toggling
V
CC
= Max., Outputs Open
f
CP
= 10 MH
Z
50% Duty Cycle
One Bit toggling
on Each Decoder
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
0.3
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
1.5
4.0
mA
1.8
3.0
5.0
7.5
(5)
9.5
(5)
3.7
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)
fo = Output Frequency
No = Number of Outputs at fo
All currents are in milliamps and all frequencies are in megahertz.
4
PS2006B 11/11/97
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PI74FCT139/239T
DUAL 1-OF-4 DECODER
PI74FCT139T Switching Characteristics over Operating Range
139T
Com.
139AT
Com.
Max
Min
Max
Min
139CT
Com.
Max
Min
139DT
Com.
Max
Unit
Parameters
t
PLH
t
PHL
t
PLH
t
PHL
Description
Propagation Delay
A
0
or A
1
to O
n
Propagation Delay
E to O
n
Conditions
(1)
C
L
= 50 pF
R
L
= 500Ω
Min
1.5
1.5
9.0
8.0
1.5
1.5
5.9
5.5
1.5
1.5
5.0
4.8
1.0
1.0
4.0
4.0
ns
ns
Notes:
1. See test circuit and wave forms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
PI74FCT239T Switching Characteristics over Operating Range
239T
Com.
(1)
239AT
Com.
Max
Min
Max
239CT
Com.
Min
Max
Unit
Parameters
t
PLH
t
PHL
t
PLH
t
PHL
Description
Propagation Delay
A
0
or A
1
to O
n
Propagation Delay
E to O
n
Conditions
C
L
= 50 pF
R
L
= 500Ω
Min
1.5
1.5
9.0
8.0
1.5
1.5
5.9
5.5
1.5
1.5
5.0
4.8
ns
ns
Notes:
1. See test circuit and wave forms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
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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PS2006B 11/11/97
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