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MC54F138 View Datasheet(PDF) - Motorola => Freescale

Part Name
Description
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MC54F138 Datasheet PDF : 3 Pages
1 2 3
MC54/74F138
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
TA
Supply Voltage
Operating Ambient Temperature Range
IOH
Output Current — High
IOL
Output Current — Low
Min
Typ
Max
Unit
54, 74
4.5
5.0
5.5
V
54
–55
25
125
°C
74
0
25
70
54, 74
–1.0
mA
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
µA
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
Symbol
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Parameter
Propagation Delay,
Address to Output
Enable to Output
E1 or E2
Enable to Output
E3
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%
VCC = 5.0 V ±10%
of
CL = 50 pF
CL = 50 pF
CL = 50 pF
Delay
Min
Max
Min
Max
Min
Max
Unit
3
3.0
7.5
3.0
12
3.0
8.5
ns
3.0
8.0
3.0
9.5
3.0
9.0
2
3.5
7.0
3.5
11
3.5
8.0
ns
3.0
7.0
3.0
8.0
3.0
7.5
3
4.0
8.0
4.0
12.5
4.0
9.0
ns
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.
FAST AND LS TTL DATA
4-54
 

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