LTC491
U
SWI I
TCH G CHARACTERISTICS
VCC = 5V ±5%
SYMBOL PARAMETER
CONDITIONS
= 54Ω, C = C = 100pF
(Figures 2, 5)
MIN
TYP
MAX
UNITS
t
Driver Input to Output
Driver Input to Output
R
DIFF
●
●
10
30
50
50
ns
PLH
L1
L2
t
t
10
30
ns
PHL
Driver Output to Output
Driver Rise or Fall Time
●
●
5
15
ns
ns
SKEW
t , t
5
25
70
r
f
t
t
t
t
t
t
t
t
t
t
t
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time From Low
Driver Disable Time From High
Receiver Input to Output
C = 100pF (Figures 4, 6) S2 Closed
L
●
●
●
●
●
●
●
●
●
●
●
40
40
40
40
70
70
13
20
20
20
20
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ZH
ZL
LZ
HZ
C = 100pF (Figures 4, 6) S1 Closed
L
70
C = 15pF (Figures 4, 6) S1 Closed
L
70
C = 15pF (Figures 4, 6) S2 Closed
L
70
R
DIFF
= 54Ω, C = C = 100pF
40
40
150
150
PLH
PHL
SKD
ZL
L1
L2
(Figures 2, 7)
Receiver Input to Output
t
– t
Differential Receiver Skew
PHL
PLH
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable From Low
Receiver Disable From High
C = 15pF (Figures 3, 8) S1 Closed
L
50
50
50
50
C = 15pF (Figures 3, 8) S2 Closed
L
ZH
C = 15pF (Figures 3, 8) S1 Closed
L
LZ
C = 15pF (Figures 3, 8) S2 Closed
L
HZ
The
●
denotes specifications which apply over the full operating
Note 2: All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to device ground unless
otherwise specified.
temperature range.
Note 1: “Absolute Maximum Ratings” are those beyond which the safety
of the device cannot be guaranteed.
Note 3: All typicals are given for V = 5V and Temperature = 25°C.
CC
U
O
U
U
PI
FU CTI
S
NC (Pin 1): Not Connected.
GND (Pin 6): Ground Connection.
GND (Pin 7): Ground Connection.
NC (Pin 8): Not Connected.
Y (Pin 9): Driver output.
R(Pin2):Receiveroutput.Ifthereceiveroutputisenabled
(REB low), then if A > B by 200mV, R will be high. If A < B
by 200mV, then R will be low.
REB (Pin 3): Receiver output enable. A low enables the
receiver output, R. A high input forces the receiver output
into a high impedance state.
Z (Pin 10): Driver output.
B (Pin 11): Receiver input.
A (Pin 12): Receiver input.
NC (Pin 13): Not Connected.
DE (Pin 4): Driver output enable. A high on DE enables the
driver outputs, A and B. A low input forces the driver
outputs into a high impedance state.
D (Pin 5): Driver input. If the driver outputs are enabled
(DE high), then A low on D forces the driver outputs A low
and B high. A high on D will force A high and B low.
VCC (Pin 14): Positive supply; 4.75V ≤ VCC ≤ 5.25V.
3
Linear [ Linear ]
