Datasheet

SN54ABT8543, SN74ABT8543
SCAN TEST DEVICES WITH
OCTAL REGISTERED BUS TRANSCEIVERS
SCBS120E – AUGUST 1991 – REVISED JULY 1996
23
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (test mode) (see Figure 13)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 5 V,
T
A
= 25°C
SN54ABT8543 SN74ABT8543
UNIT
(INPUT)
(OUTPUT)
MIN TYP MAX MIN MAX MIN MAX
f
max
TCK 50 90 50 50 MHz
t
PLH
TCK↓
AorB
3.5 8 9.5 3.5 12.7 3.5 12
ns
t
PHL
TCK↓
A
or
B
3 7.7 9 3 12 3 11.5
ns
t
PLH
TCK↓
TDO
2.5 4.3 5.5 2.5 7 2.5 6.5
ns
t
PHL
TCK↓
TDO
2.5 4.2 5.5 2.5 7 2.5 6.5
ns
t
PZH
TCK↓
AorB
4.5 8.2 9.5 4.5 12.5 4.5 12
ns
t
PZL
TCK↓
A
or
B
4.5 9 10.5 4.1 13.5 4.5 13
ns
t
PZH
TCK↓
TDO
2.5 4.3 5.5 2.5 7 2.5 6.5
ns
t
PZL
TCK↓
TDO
2.5 4.9 6 2.5 7.5 2.5 7
ns
t
PHZ
TCK↓
AorB
3.5 8.4 10.5 3.5 14 3.5 13.5
ns
t
PLZ
TCK↓
A
or
B
3 8 10.5 3 13.5 3 13
ns
t
PHZ
TCK↓
TDO
3 5.9 7 3 9 3 8.5
ns
t
PLZ
TCK↓
TDO
3 5 6.5 3 8 3 7.5
ns