Datasheet

SN54ABTH18502A, SN54ABTH182502A, SN74ABTH18502A, SN74ABTH182502A
SCAN TEST DEVICES
WITH 18-BIT UNIVERSAL BUS TRANSCEIVERS
SCBS164E – AUGUST 1993 – REVISED DECEMBER 1996
31
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 14)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 5 V,
T
A
= 25°C
SN54ABTH18502A SN74ABTH18502A
UNIT
(INPUT)
(OUTPUT)
MIN TYP MAX MIN MAX MIN MAX
f
max
TCK 50 90 50 50 MHz
t
PLH
TCK↓
AorB
2.5 7.4 11 2.5 14.5 2.5 13.1
ns
t
PHL
TCK↓
A
or
B
2.5 7.6 10.8 2.5 14 2.5 12.4
ns
t
PLH
TCK↓
TDO
2 3.8 5.1 2 7 2 5.6
ns
t
PHL
TCK↓
TDO
2 4 5.1 2 7 2 5.6
ns
t
PZH
TCK↓
AorB
4 8 11.5 4 14.5 4 13.4
ns
t
PZL
TCK↓
A
or
B
4 8 11.8 4 15 4 13.6
ns
t
PZH
TCK↓
TDO
2 3.9 5.7 2 7.5 2 6.6
ns
t
PZL
TCK↓
TDO
2 4.2 6.2 2 8 2 6.9
ns
t
PHZ
TCK↓
AorB
4 10.8 13 4 18 4 15
ns
t
PLZ
TCK↓
A
or
B
3 9.1 13.3 3 17.5 3 15
ns
t
PHZ
TCK↓
TDO
3 5.3 6.8 3 8 3 7.2
ns
t
PLZ
TCK↓
TDO
2.5 4.2 5.5 2.5 8 2.5 6.3
ns