Datasheet

5
LTC488/LTC489
LTC488
LTC489
DIFFERENTIAL ENABLES OUTPUT
A – B EN12 or EN34 RO
V
ID
≥ 0.2V H H
–0.2V < V
ID
< 0.2V H ?
V
ID
≤ 0.2V H L
XLZ
H: High Level
L: Low Level
X: Irrelevant
?: Indeterminate
Z: High Impedance (Off)
FU CTIO TABLES
U
U
DIFFERENTIAL ENABLES OUTPUT
A – B EN EN RO
V
ID
≥ 0.2V H X H
XLH
–0.2V < V
ID
< 0.2V H X ?
XL?
V
ID
≤ 0.2V H X L
XLL
XLHZ
TEST CIRCUITS
Figure 1. Receiver Timing Test Circuit
Note: The input pulse is supplied by a generator having the following characteristics:
f = 1MHz, Duty Cycle = 50%, t
r
< 10ns, t
f
≤ 10ns, Z
OUT
= 50Ω
D
488/9 F01
DRIVER RECEIVER
C
L
RO
A
B
54Ω
100pF
100pF
Figure 2. Receiver Enable and Disable Timing Test Circuit
1k
488/9 F02
C
L
S1
S2
1k
V
CC
RECEIVER
OUTPUT