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DM74AS257 Datasheet(HTML) 4 Page - Fairchild Semiconductor

Part No. DM74AS257
Description  3-STATE Quad 1 of 2 Line Data Selector/Multiplexers
Download  8 Pages
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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DM74AS257 Datasheet(HTML) 4 Page - Fairchild Semiconductor

   
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©1986 Fairchild Semiconductor Corporation
www.fairchildsemi.com
DM74AS257, DM74AS258 Rev. 1.2
4
Electrical Characteristics
Over recommended operating free air temperature range. All typical values are measured at VCC = 5V, TA = 25°C.
Note:
1. The output conditions have been chosen to produce a current that closely approximates one half of the true
short-circuit output current, IOS.
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Units
VIK
Input Clamp Voltage
VCC = 4.5V, II = –18 mA
–1.2
V
VOH
HIGH Level Output Voltage
VCC = 4.5V, IOH = Max
2.4
3.2
V
IOH = –2 mA, VCC = 4.5V to 5.5V
VCC – 2
VOL
LOW Level Output Voltage
VCC = 4.5V, IOL = Max
0.35
0.5
V
II
Input Current @ Max. Input
Voltage
VCC = 5.5V, VIH = 7V
A, B, G
0.1
mA
Select
0.2
IIH
HIGH Level Input Current
VCC = 5.5V, VIH = 2.7V A, B, G
20
µA
Select
40
IIL
LOW Level Input Current
VCC = 5.5V, VIL = 0.4V Select
–1
mA
All Others
–0.5
IO
(1)
Output Drive Current
VCC = 5.5V, VO = 2.25V
–30
–112
mA
IOZH
Off-State Output Current,
HIGH Level Voltage Applied
VCC = 5.5V, VO = 2.7V
–50
µA
IOZL
Off-State Output Current,
LOW Level Voltage Applied
VCC = 5.5V, VO = 0.4V
–50
µA
ICCH
Supply Current DM74AS257
VCC = 5.5V,
Outputs Open
Outputs HIGH
12.9
19.7
mA
DM74AS258
8.8
13.5
ICCL
Supply Current DM74AS257
Outputs LOW
19
30.6
mA
DM74AS258
15.8
24.6
ICCZ
Supply Current DM74AS257
Outputs
Disabled
19.7
31.9
mA
DM74AS258
15.5
25.2


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