Datasheet

SN54LVT8996, SN74LVT8996
3.3-V 10-BIT ADDRESSABLE SCAN PORTS
MULTIDROP-ADDRESSABLE IEEE STD 1149.1 (JTAG) TAP TRANSCEIVERS
SCBS686A – APRIL 1997 – REVISED DECEMBER 1999
37
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued) (see Figure 24)
SN54LVT8996
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
= 3.3 V
± 0.3 V
V
CC
= 2.7 V
UNIT
MIN MAX MIN MAX
t
PZH
†
BYP↓
PTDO
1.5 9.5 1.5 11.6
ns
t
PZL
BYP↓
PTDO
1.5 10.7 1.5 12.7
ns
t
PZH
‡
BYP↓
STDO
1.5 8.6 1.5 10.2
ns
t
PZL
BYP↓
STDO
1.5 9.7 1.5 11.5
ns
t
PZH
†
PTCK↓
PTDO 4 15.3 4 18.2 ns
t
PZH
‡
PTCK↓
STDO 4 16.6 4 19.6 ns
t
PZL
PTCK↓
STDO 4 17.3 4 20.5 ns
t
PHZ
†
BYP↑
PTDO
1.5 8.6 1.5 10.3
ns
t
PLZ
BYP↑
PTDO
1.5 8.2 1.5 7
ns
t
PHZ
‡
BYP↑
STDO
1.5 7.6 10.4
ns
t
PLZ
BYP↑
STDO
1.5 7.4 1.5 7.9
ns
t
PHZ
†
PTCK↓
PTDO
3 15 3 18.1
ns
t
PLZ
PTCK↓
PTDO
3 14.4 3 16.3
ns
t
PHZ
‡
PTCK↓
STDO
3.5 16.9 3.5 18.8
ns
t
PLZ
§
PTCK↓
STDO
3.5 13.8 3.5 16.7
ns
t
PHZ
†
PTRST↓
PTDO
3.5 19.6 3.5 26.2
ns
t
PLZ
PTRST↓
PTDO
3.5 19.3 3.5 21.3
ns
t
PHZ
‡
PTRST↓
STDO
4.5 19.4 4.5 23.6
ns
t
PLZ
PTRST↓
STDO
4.5 20.6 4.5 23.8
ns
†
In most applications, the node to which PTDO is connected has a pullup resistor. In such cases, this parameter is not significant.
‡
In most applications, the node to which STDO is connected has a pullup resistor. In such cases, this parameter is not significant.
§
This parameter applies only in case of protocol result HARD ERROR.
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.