Datasheet

SN55LBC176, SN65LBC176, SN65LBC176Q, SN75LBC176
DIFFERENTIAL BUS TRANSCEIVERS
SLLS067H AUGUST 1990 REVISED DECEMBER 2010
9
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
I
OH
+I
OL
V
OL
V
ID
V
OH
Figure 6. Receiver V
OH
and V
OL
51 Ω
C
L
= 15 pF
(see Note B)
Output
1.5 V
0 V
TEST CIRCUIT
VOLTAGE WAVEFORMS
1.5 V
3 V
0 V
Input
Output
1.3 V
V
OH
V
OL
t
PHL
t
PLH
Generator
(see Note A)
1.5 V
1.3 V
NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR 1 MHz, 50% duty cycle, t
r
6 ns, t
f
6 ns,
Z
O
=50Ω.
B. C
L
includes probe and jig capacitance.
Figure 7. Receiver Test Circuit and Voltage Waveforms
THERMAL CHARACTERISTICS D PACKAGE
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Junction to ambient thermal reisistance θ
Low-K board, no air flow 199.4
Junctiontoambient thermal reisistance, θ
JA
High-K board, no air flow 119
°C/W
Junctiontoboard thermal reisistance, θ
JB
High-K board, no air flow 67
°C/W
Junctiontocase thermal reisistance, θ
JC
46.6
Average power dissipation, P
(AVG)
R
L
= 54 Ω, input to D is 10 Mbps 50% duty
cycle square wave, V
CC
= 5.25 V,
T
J
= 130 °C.
330 mW
Thermal shutdown junction temperature, T
SD
165 °C
See TI application note literature number SZZA003, Package Thermal Characterization Methodologies, for an explanation of this parameter.