Data Sheet
March 2001
Dual Differential Transceiver BTF1A
With Idle Bus Indicator
Timing Characteristics
(continued)
3V
E1*
1.5 V
0V
3V
E2
†
t
PHZ
t
PZH
t
PLZ
t
PZL
1.5 V
0V
V
OH
OUTPUT
V
OL
∆V
= 0.5 V
∆V
= 0.5 V
∆V
= 0.5 V
∆V
= 0.5 V
12-2538.b(F)
* E2 = 1 while E1 changes state.
† E1 = 0 while E2 changes state.
Figure 6. Receiver Enable and Disable Timing
Test Conditions
+5 V
Parametric values specified under the Electrical Char-
acteristics and Timing Characteristics sections for the
data transmission driver devices are measured with the
following output load circuits.
100
Ω
DO
200
Ω
DO
200
Ω
TO OUTPUT OF
DEVICE UNDER
TEST
C
L
15 pF*
5 kΩ
2 kΩ
12-2249(F)
* Includes probe and jig capacitances.
Note: All 458E, IN4148, or equivalent diodes.
12-2271.a(F)
Figure 8. Receiver Propagation Delay Test Circuit
Figure 7. Driver Propagation Delay Test Circuit
Agere Systems Inc.
9
AGERE [ AGERE SYSTEMS ]
