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LTC491 Datasheet(Fiches technique) 3 Page - Linear Technology

Numéro de pièce LTC491
Description  Differential Driver and Receiver Pair
Télécharger  12 Pages
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Fabricant  LINER [Linear Technology]
Site Internet  http://www.linear.com
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3
LTC491
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
tPLH
Driver Input to Output
RDIFF = 54Ω, CL1 = CL2 = 100pF
q
10
30
50
ns
tPHL
Driver Input to Output
q
10
30
50
ns
tSKEW
Driver Output to Output
q
5ns
tr, tf
Driver Rise or Fall Time
q
515
25
ns
tZH
Driver Enable to Output High
CL = 100pF (Figures 4, 6) S2 Closed
q
40
70
ns
tZL
Driver Enable to Output Low
CL = 100pF (Figures 4, 6) S1 Closed
q
40
70
ns
tLZ
Driver Disable Time From Low
CL = 15pF (Figures 4, 6) S1 Closed
q
40
70
ns
tHZ
Driver Disable Time From High
CL = 15pF (Figures 4, 6) S2 Closed
q
40
70
ns
tPLH
Receiver Input to Output
RDIFF = 54Ω, CL1 = CL2 = 100pF
q
40
70
150
ns
tPHL
Receiver Input to Output
q
40
70
150
ns
tSKD
 tPLH – tPHL Differential Receiver Skew
q
13
ns
tZL
Receiver Enable to Output Low
CL = 15pF (Figures 3, 8) S1 Closed
q
20
50
ns
tZH
Receiver Enable to Output High
CL = 15pF (Figures 3, 8) S2 Closed
q
20
50
ns
tLZ
Receiver Disable From Low
CL = 15pF (Figures 3, 8) S1 Closed
q
20
50
ns
tHZ
Receiver Disable From High
CL = 15pF (Figures 3, 8) S2 Closed
q
20
50
ns
S
GC
C
HARA TERISTICS
WITCHI
VCC = 5V ±5%
(Figures 2, 5)
(Figures 2, 7)
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.
Note 3: All typicals are given for VCC = 5V and Temperature = 25°C.
The q denotes specifications which apply over the full operating
temperature range.
Note 1: “Absolute Maximum Ratings” are those beyond which the safety
of the device cannot be guaranteed.
NC (Pin 1): Not Connected.
R (Pin 2): Receiver output. If the receiver output is enabled
(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.
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.
GND (Pin 6): Ground Connection.
GND (Pin 7): Ground Connection.
NC (Pin 8): Not Connected.
Y (Pin 9): Driver output.
Z (Pin 10): Driver output.
B (Pin 11): Receiver input.
A (Pin 12): Receiver input.
NC (Pin 13): Not Connected.
VCC (Pin 14): Positive supply; 4.75V ≤ VCC ≤ 5.25V.
PI
FU C
S
TI




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