Integrated Device Technology Inc. IDT 79RV3081, IDT79RV3081E User Manual
查询IDT54FCT138ADB供应商
Integrated Device Technology, Inc.
FAST CMOS
1-OF-8 DECODER
WITH ENABLE
IDT54/74FCT138
IDT54/74FCT138A
IDT54/74FCT138C
FEATURES:
• IDT54/74FCT138 equivalent to FAST speed
• IDT54/74FCT138A 35% faster than FAST
• IDT54/74FCT138C 40% faster than FAST
• Equivalent to FAST speeds output drive over full temperature 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.)
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 (
feature three enable inputs, two active LOW (
active HIGH (E3). All outputs will be HIGH unless
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.
O
0 - O7). The IDT54/74FCT138/A/C
• 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.
FUNCTIONAL BLOCK DIAGRAM PIN CONFIGURATIONS
E1 E2
E3A0A1A2
E
E
O
GND
1
A
0
2
A
1
A
2
E
1
2
3
7
3
4
5
6
7
8
P16-1,
D16-1,
SO16-1
E16-1
E
1, E2) and one
E
1 and E2
16
Vcc
15
O
0
14
O
1
13
O
2
12
O
&
11
10
9
3
O
4
5
O
O
6
DIP/SOIC/CERPACK
TOP VIEW
1
NC
20 19
NC
Vcc
0
O
18
O1
17
O
16
15
14
2
NC
O3
O
4
O5O6
2581 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor Co.
O0O1O2O3O4O5O6O7
2581 drw 02
INDEX
A2
E1
NC
2
E
E3
A0
A1
32
4
5
L20-2
6
7
8
10 11 12 13
9
7
O
GND
LCC
TOP VIEW
MILITARY AND COMMERCIAL TEMPERATURE RANGES MAY 1992
1992 Integrated Device Technology, Inc. 7.3 DSC-4625/3
1
IDT54/74FCT138/A/C
FAST CMOS 1-OF-8 DECODER-WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
Pin Names Description
0–A2 Address Inputs
A
1, E2 Enable Inputs (Active LOW)
E
3 Enable Input (Active HIGH)
E
0–O7 Outputs (Active LOW)
O
2581 tbl 05
FUNCTION TABLE
Inputs Outputs
1
E
E
H X XXXXHHH HHHHH
X H XXXXHHH HHHHH
X X LXXXHHH HHHHH
L L HLLLLHH HHHHH
L L HHLLHLH HHHHH
L L HLHLHHL HHHHH
L L HHHLHHH LHHHH
L L HLLHHHHHLHHH
L L HHLHHHH HHLHH
L L HLHHHHH HHHLH
L L HHHHHHH HHHHL
E
2 E3 A0 A1 A2
E
O
0
O
O
1 O2
O
O
3
O
O
4
O
O
5
O
O
6
O
O
7
O
2581 tbl 06
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol Rating Commercial Military Unit
(2)
V
TERM
Terminal Voltage –0.5 to +7.0 –0.5 to +7.0 V
with Respect
to GND
(3)
V
TERM
Terminal Voltage –0.5 to VCC –0.5 to VCC V
with Respect
to GND
T
A Operating 0 to +70 –55 to +125 °C
Temperature
T
BIAS Temperature –55 to +125 –65 to +135 °C
Under Bias
T
STG Storage –55 to +125 –65 to +150 °C
Temperature
P
T Power Dissipation 0.5 0.5 W
OUT DC Output Current 120 120 mA
I
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 V
2. Inputs and V
3. Outputs and I/O terminals only.
CC by +0.5V unless otherwise noted.
CC terminals only.
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol Parameter
IN Input Capacitance V IN = 0V 6 10 pF
C
OUT Output Capacitance VOUT = 0V 8 12 pF
C
NOTE: 2581 tbl 02
1. This parameter is guaranteed characterization data and not tested.
(1)
Conditions Typ. Max. Unit
7.3 2
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