Datasheet

SN54AC245, SN74AC245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCAS461F − FEBRUARY 1995 − REVISED OCTOBER 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
T
A
= 25°C SN54AC245 SN74AC245
UNIT
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
3 V 2.9 2.9 2.9
I
OH
= −50 mA
4.5 V 4.4 4.4 4.4
I
OH
50
mA
5.5 V 5.4 5.4 5.4
V
I
OH
= −12 mA 3 V 2.56 2.4 2.46
V
V
OH
I 24 mA
4.5 V 3.86 3.7 3.76
V
I
OH
= −24 mA
5.5 V 4.86 4.7 4.76
I
OH
= −50 mA
†
5.5 V 3.85
I
OH
= −75 mA
†
5.5 V 3.85
3 V 0.002 0.1 0.1 0.1
I
OL
= 50 mA
4.5 V 0.001 0.1 0.1 0.1
I
OL
50
mA
5.5 V 0.001 0.1 0.1 0.1
V
I
OL
= 12 mA 3 V 0.36 0.5 0.44
V
V
OL
I 24 mA
4.5 V 0.36 0.5 0.44
V
I
OL
= 24 mA
5.5 V 0.36 0.5 0.44
I
OL
= 50 mA
†
5.5 V 1.65
I
OL
= 75 mA
†
5.5 V 1.65
I
A or B ports
‡
V V or GND
55V
±0.1 ±1 ±1
A
I
I
OE or DIR
V
I
= V
CC
or GND 5.5 V
±0.1 ±1 ±1
mA
I
OZ
V
O
= V
CC
or GND,
V
I
(OE) = V
IL
or V
IH
5.5 V ±0.5 ±10 ±5 mA
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.5 V 4 80 40 mA
C
i
V
I
= V
CC
or GND 5 V 4.5 pF
C
io
V
O
= V
CC
or GND 5 V 15 pF
†
Not more than one output should be tested at a time, and the duration of the test should not exceed 2 ms.
‡
For I/O ports, the parameter I
OZ
includes the input leakage current.
switching characteristics over recommended operating free-air temperature range,
V
CC
= 3.3 V " 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO
T
A
= 25°C SN54AC245 SN74AC245
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
PLH
AorB
BorA
1.5 5 8.5 1 11.5 1 9
ns
t
PHL
A or B B or A
1.5 5 8.5 1 10 1 9
ns
t
PZH
OE
AorB
2.5 7 11.5 1 13.5 2 12.5
ns
t
PZL
OE
A or B
2.5 7.5 12 1 14.5 2 13.5
ns
t
PHZ
OE
AorB
2 6.5 12 1 13.5 1 12.5
ns
t
PLZ
OE
A or B
2 7 11.5 1 14 1.5 13
ns