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SN54ABT8952, SN74ABT8952
SCAN TEST DEVICES WITH
OCTAL REGISTERED BUS TRANSCEIVERS
SCBS121D – AUGUST 1992 – REVISED JULY 1996
19
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
E
E
T
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
R
S
S
C
S
U
S
C
S
U
S
S
T
TCK
TMS
TDI
TDO
TAP
Controller
State
3-State (TDO) or Don’t Care (TDI)
Figure 12. Timing Example
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
Input voltage range, V
I
(except I/O ports) (see Note 1)
Input voltage range, V
I
(I/O ports) (see Note 1)
Voltage range applied to any output in the high state or power-off state, V
O
Current into any output in the low state, I
O
: SN54ABT8952
–0.5 V to 7 V
–0.5 V to 7 V
–0.5 V to 5.5 V
–0.5 V to 5.5 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
96 mA
128 mA
–18 mA
–50 mA
0.7 W
1.7 W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ABT8952
Input clamp current, I
IK
(V
I
< 0)
Output clamp current, I
OK
(V
O
< 0)
Maximum power dissipation at T
A
= 55
°
C (in still air) (see Note 2):DL package
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
DW package
Storage temperature range, T
stg
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES:
1. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. The maximum package power dissipation is calculated using a junction temperature of 150
°
C and a board trace length of 750 mils.
For more information, refer to the Package Thermal Considerationsapplication note in the ABT Advanced BiCMOS Technology Data
Book literature number SCBD002.
–65
°
C to 150
°
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
recommended operating conditions (see Note 3)
SN54ABT8952
SN74ABT8952
UNIT
MIN
4.5
MAX
5.5
MIN
4.5
MAX
5.5
VCC
VIH
VIL
VI
IOH
IOL
t/
v
TA
NOTE 3: Unused pins (input or I/O) must be held high or low to prevent them from floating.
Supply voltage
High-level input voltage
Low-level input voltage
Input voltage
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature
V
V
V
V
2
2
0.8
0.8
0
VCC
–24
48
10
125
0
VCC
–32
64
10
85
mA
mA
ns/V
°
C
–55
–40
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.