IDT74FCT138. 74FCT138 Datasheet

74FCT138 IDT74FCT138. Datasheet pdf. Equivalent

Part 74FCT138
Description IDT74FCT138
Feature ® www.DataSheet4U.com FAST CMOS 1-OF-8 DECODER WITH ENABLE DESCRIPTION: IDT54/74FCT138 IDT54/74FCT.
Manufacture IDT
Datasheet
Download 74FCT138 Datasheet




74FCT138
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®
Integrated Device Technology, Inc.
FAST CMOS
1-OF-8 DECODER
WITH ENABLE
IDT54/74FCT138
IDT54/74FCT138A
IDT54/74FCT138C
FEATURES:
• IDT54/74FCT138 equivalent to FASTspeed
IDT54/74FCT138A 35% faster than FAST
IDT54/74FCT138C 40% faster than FAST
• Equivalent to FAST speeds output drive over full tem-
perature and voltage supply extremes
• IOL = 48mA (commercial) and 32mA (military)
• CMOS power levels (1mW typ. static)
• TTL input and output level compatible
• CMOS output level compatible
• Substantially lower input current levels than FAST
(5µA max.)
• JEDEC standard pinout for DIP and LCC
• Product available in Radiation Tolerant and Radiation
Enhanced versions
• Military product compliant to MIL-STD-883, Class B
• Standard Military Drawing # 5962-87654 is listed on this
function. Refer to section 2.
DESCRIPTION:
The IDT54/74FCT138/A/C are 1-of-8 decoders built using
an advanced dual metal CMOS technology. The IDT54/
74FCT138/A/C accept three binary weighted inputs (A0, A1,
A2) and, when enabled, provide eight mutually exclusive
active LOW outputs (O 0 - O 7). The IDT54/74FCT138/A/C
feature three enable inputs, two active LOW (E 1, E 2) and one
active HIGH (E3). All outputs will be HIGH unless E 1 and E 2
are LOW and E3 is HIGH. This multiple enable function allows
easy parallel expansion of the device to a 1-of-32 (5 lines to
32 lines) decoder with just four IDT54/74FCT138/A/C devices
and one inverter.
FUNCTIONAL BLOCK DIAGRAM
A2 A1
A0
E1 E2 E3
PIN CONFIGURATIONS
A0
A1
A2
E1
E2
E3
O7
GND
1 16
2 15
3 P16-1, 14
4
D16-1,
SO16-1
13
5 & 12
6 E16-1 11
7 10
89
Vcc
O0
O1
O2
O3
O4
O5
O6
DIP/SOIC/CERPACK
TOP VIEW
O7 O6 O5 O4 O3 O2 O1 O0
2581 drw 02
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor Co.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1992 Integrated Device Technology, Inc.
7.3
INDEX
3 2 20 19
A2 4
1 18 O1
E1 5
17 O2
NC 6 L20-2 16 NC
E2 7
15 O3
E3 8
14 O4
9 10 11 12 13
2581 drw 01
LCC
TOP VIEW
MAY 1992
DSC-4625/3
1



74FCT138
IDT54/74FCT138/A/C
FAST CMOS 1-OF-8 DECODER-WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
wwwP.DINataDShEeeSt4CU.RcoImPTION
Pin Names
Description
A0–A2
Address Inputs
E 1, E 2
Enable Inputs (Active LOW)
E3 Enable Input (Active HIGH)
O 0O 7
Outputs (Active LOW)
2581 tbl 05
FUNCTION TABLE
Inputs
E 1 E 2 E3 A0 A1 A2 O 0 O 1 O2
H X X XX XH H H
X H X XX XH H H
X X L XX XH H H
L L H LL LL HH
L L H HL LH L H
L L H LH LH H L
L L H HH LH H H
L L H L L HH H H
L L H HL HH H H
L L H LH HH H H
L L H HH HH H H
Outputs
O3 O4 O5 O6 O7
HHHHH
HHHHH
HHHHH
HHHHH
HHHHH
HHHHH
L HHHH
H L HHH
HHL HH
HHH LH
HHHH L
2581 tbl 06
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Rating
VTERM(2) Terminal Voltage
with Respect
to GND
VTERM(3) Terminal Voltage
with Respect
to GND
Commercial Military Unit
–0.5 to +7.0 –0.5 to +7.0 V
–0.5 to VCC –0.5 to VCC V
TA Operating
Temperature
0 to +70 –55 to +125 °C
TBIAS
Temperature
Under Bias
–55 to +125 –65 to +135 °C
TSTG
Storage
Temperature
–55 to +125 –65 to +150 °C
PT
Power Dissipation
0.5
0.5 W
IOUT
DC Output Current
120
120 mA
NOTES:
2581 tbl 01
1. Stresses greater than those listed under ABSOLUTE 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. No terminal voltage
may exceed VCC by +0.5V unless otherwise noted.
2. Inputs and VCC terminals only.
3. Outputs and I/O terminals only.
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol Parameter(1) Conditions Typ. Max. Unit
CIN Input Capacitance VIN = 0V 6 10 pF
COUT Output Capacitance VOUT = 0V 8 12 pF
NOTE:
2581 tbl 02
1. This parameter is guaranteed characterization data and not tested.
7.3 2







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