Datasheet

SN54ABT657A, SN74ABT657A
OCTAL TRANSCEIVERS WITH PARITY GENERATORS/CHECKERS
AND 3-STATE OUTPUTS
SCBS192E – JANUARY 1991 – REVISED JUNE 1997
6
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
T
A
= 25°C SN54ABT657A SN74ABT657A
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP
MAX MIN MAX MIN MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.2 –1.2 –1.2 V
V
CC
= 4.5 V, I
OH
= –3 mA 2.5 2.5 2.5
V
OH
V
CC
= 5 V, I
OH
= –3 mA 3 3 3
V
V
OH
V
CC
=45V
I
OH
= –24 mA 2 2
V
V
CC
=
4
.
5
V
I
OH
= –32 mA 2* 2
V
OL
V
CC
=45V
I
OL
= 48 mA 0.55 0.55
V
V
OL
V
CC
=
4
.
5
V
I
OL
= 64 mA 0.55* 0.55
V
V
hys
100 mV
I
I
Control inputs V
CC
= 0 to 5.5 V, V
I
= V
CC
or GND ±1 ±1 ±1
µA
I
I
A or B ports V
CC
= 2.1 V to 5.5 V, V
I
= V
CC
or GND ±20 ±20 ±20
µ
A
I
OZPU
V
CC
= 0 to 2.1 V, V
O
= 0.5 V to 2.7 V,
OE
= X
±50 ±50 ±50 µA
I
OZPD
V
CC
= 2.1 V to 0, V
O
= 0.5 V to 2.7 V,
OE
= X
±50 ±50 ±50 µA
I
OZH
§
V
CC
= 2.1 V to 5.5 V, V
O
= 2.7 V,
OE
2 V
10 10 10 µA
I
OZL
§
V
CC
= 2.1 V to 5.5 V, V
O
= 0.5 V,
OE
2 V
–10 –10 –10 µA
I
off
V
CC
= 0, V
I
or V
O
4.5 V ±100 ±100 µA
I
CEX
V
CC
= 5.5 V,
V
O
= 5.5 V
Outputs high 50 50 50 µA
I
O
V
CC
= 5.5 V, V
O
= 2.5 V –50 –100 –200 –50 –200 –50 –200 mA
V
CC
=
5.5 V,
Outputs high 250 250 250 µA
I
CC
V
CC
=
5
.
5
V
,
I
O
= 0,
Outputs low 40 40 40 mA
V
I
= V
CC
or GND
Outputs disabled 250 250 250 µA
p
V
CC
= 5.5 V,
One input at 3.4 V,
Outputs enabled 1.5 1.5 1.5
I
CC
#
u
,
Other inputs at
V
CC
or GND
Outputs disabled 0.25 0.25 0.25 mA
Control inputs
V
CC
= 5.5 V, One input at 3.4 V,
Other inputs at V
CC
or GND
1.5 1.5 1.5
C
i
Control inputs V
I
= 2.5 V or 0.5 V 4 pF
C
io
A or B ports V
O
= 2.5 V or 0.5 V 10 pF
* On products compliant to MIL-PRF-38535, this parameter does not apply.
All typical values are at V
CC
= 5 V.
This parameter is characterized, but not production tested.
§
The parameters I
OZH
and I
OZL
include the input leakage current.
Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
#
This is the increase in supply current for each input that is at the specified TTL voltage level rather than V
CC
or GND.
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design phase of development. Characteristic data and other
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change or discontinue these products without notice.