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SN54ALS245A Datasheet(PDF) 5 Page - Texas Instruments

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Part No. SN54ALS245A
Description  OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN54ALS245A Datasheet(HTML) 5 Page - Texas Instruments

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SN54ALS245A, SN54AS245, SN74ALS245A, SN74AS245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDAS272A – NOVEMBER 1994 – REVISED JANUARY 2003
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54AS245
SN74AS245
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP†
MAX
MIN
TYP†
MAX
UNIT
VIK
VCC = 4.5 V,
II = – 18 mA
–1.2
–1.2
V
VCC = 4.5 V to 5.5 V,
IOH = – 2 mA
VCC – 2
VCC – 2
VOH
IOH = – 3 mA
2.4
3.2
2.4
3.2
V
VOH
VCC = 4.5 V
IOH = – 12 mA
2
V
IOH = – 15 mA
2
VOL
VCC =4 5V
IOL = 48 mA
0.3
0.55
V
VOL
VCC = 4.5 V
IOL = 64 mA
0.35
0.55
V
II
Control inputs
VCC =5 5V
VI = 7 V
0.1
0.1
mA
II
A or B ports
VCC = 5.5 V
VI = 5.5 V
0.1
0.1
mA
IIH
Control inputs
VCC =5 5V
VI =2 7V
50
20
µA
IIH
A or B ports‡
VCC = 5.5 V,
VI = 2.7 V
70
70
µA
IIL
Control inputs
VCC =5 5V
VI =0 4V
– 0.5
– 0.5
mA
IIL
A or B ports‡
VCC = 5.5 V,
VI = 0.4 V
– 0.75
– 0.75
mA
IO§
VCC = 5.5 V,
VO = 2.25 V
– 50
– 150
– 50
– 150
mA
Outputs high
62
97
62
97
ICC
VCC = 5.5 V
Outputs low
95
143
95
143
mA
Outputs disabled
79
123
79
123
† All typical values are VCC = 5 V, TA = 25°C.
‡ For I/O ports, the parameters IIH and IIL include the off-state output current.
§ The output conditions have been chosen to produce a current that closely approximates one-half of the true short-circuit output current, IOS.
switching characteristics (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500
Ω,
R2 = 500
Ω,
TA = MIN to MAX¶
UNIT
SN54AS245
SN74AS245
MIN
MAX
MIN
MAX
tPLH
AorB
BorA
2
9.5
2
7.5
ns
tPHL
A or B
B or A
2
9
2
7
ns
tPZH
OE
AorB
2
11
2
9
ns
tPZL
OE
A or B
2
10.5
2
8.5
ns
tPHZ
OE
AorB
2
7.5
2
5.5
ns
tPLZ
OE
A or B
2
12
2
9.5
ns
¶ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.


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