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参数资料
| 型号： | MC54F138N |
| 厂商： | Motorola, Inc. |
| 英文描述： | 1-OF-8 DECODER/ DEMULTIPLEXER |
| 中文描述： | 1 - 8译码器/解复用器 |
| 文件页数： | 2/3页 |
| 文件大小： | 82K |
| 代理商： | MC54F138N |
4-54
FAST AND LS TTL DATA
MC54/74F138
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
54, 74
4.5
5.0
5.5
V
TA
Operating Ambient Temperature Range
54
–55
25
125
°C
74
0
25
70
IOH
Output Current — High
54, 74
–1.0
mA
IOL
Output Current — Low
54, 74
20
mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage
VIL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage
VIK
Input Clamp Diode Voltage
–1.2
V
VCC = MIN, IIN = –18 mA
VOH
Output HIGH Voltage
54, 74
2.5
V
IOH = –1.0 mA
VCC = 4.50 V
74
2.7
V
IOH = –1.0 mA
VCC = 4.75 V
VOL
Output LOW Voltage
0.5
V
IOL = 20 mA
VCC = MIN
IIH
Input HIGH Current
20
A
VCC = MAX, VIN = 2.7 V
0.1
mA
VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
–0.6
mA
VCC = MAX, VIN = 0.5 V
IOS
Output Short Circuit Current (Note 2)
–60
–150
mA
VCC = MAX, VOUT = 0 V
ICC
Power Supply Current
20
mA
VCC = MAX
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS
54/74F
54F
74F
TA = +25 °C
TA = +25°C to +125°C
TA = 0°C to 70°C
Levels
VCC = +5.0 V
VCC = 5.0 V ±10%
of
CL = 50 pF
Symbol
Parameter
Delay
Min
Max
Min
Max
Min
Max
Unit
tPLH
Propagation Delay,
3
3.0
7.5
3.0
12
3.0
8.5
ns
tPHL
Address to Output
3.0
8.0
3.0
9.5
3.0
9.0
tPLH
Enable to Output
2
3.5
7.0
3.5
11
3.5
8.0
ns
tPHL
E1 or E2
3.0
7.0
3.0
8.0
3.0
7.5
tPLH
Enable to Output
3
4.0
8.0
4.0
12.5
4.0
9.0
ns
tPHL
E3
3.5
7.5
3.5
8.5
3.5
8.5
FUNCTIONAL DESCRIPTION
The decoder accepts three binary weighted inputs (AO, A1,
A2) and when enabled provides eight mutually exclusive
active LOW outputs (O0–O7). The F138 features three Enable
inputs, two active LOW (E1, E2) and one active HIGH (E3). All
outputs will be HIGH unless E1 and E2 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 F138s and one inverter.
The F138 can be used as an 8-output demultiplexer by
using one of the active LOW Enable inputs as the data input
and the other Enable inputs as strobes. The Enable inputs
which are not used must be permanently tied to their
appropriate active HIGH or active LOW states.
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相关代理商/技术参数 |
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| MC54F139J | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:DUAL 1-OF-4 DECODER FAST SHOTTKY TTL |
| MC54F13J | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:SCHMITT TRIGGERS DUAL 4-INPUT NAND/HEX INVERTERS FAST SCHOTTKY TTL |
| MC54F148J | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:8-LINE TO 3-LINE PRIORITY ENCODER FAST SHOTTKY TTL |
| MC54F14J | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:SCHMITT TRIGGERS DUAL 4-INPUT NAND/HEX INVERTERS |
| MC54F151J | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:8-INPUT MULTIPLEXER FAST SHOTTKY TTL |
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