Datasheet

3
LTC1686/LTC1687
DC ELECTRICAL CHARACTERISTICS
V
DD
= 5V ±5% unless otherwise noted (Notes 2, 3).
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OL
Receiver Output Low Voltage I
OUT
= 4mA, V
ID
= – 300mV 0.4 V
I
OZR
Three-State (High Impedance) Output 0.4V V
OUT
2.4V –1 1 µA
Current at Receiver
I
OZD
Three-State (High Impedance) Output V
OUT
= – 7V to 12V 200 200 µA
Current at Driver
C
LOAD
Receiver and Driver Output Load Capacitance (Note 4) 500 pF
I
DD
Supply Current No Load, Pins D, DE, RE = 0V or V
DD
712 mA
I
OSD1
Driver Short-Circuit Current, V
OUT
= HIGH V
OUT
= – 7V or 10V (Note 5) 20 mA
I
OSD2
Driver Short-Circuit Current, V
OUT
= LOW V
OUT
= – 7V or 10V (Note 5) 20 mA
I
OSR
Receiver Short-Circuit Current V
OUT
= 0V or V
DD
(Note 5) 20 mA
R
IN
Input Resistance 7V V
CM
12V 22 k
C
IN
Input Capacitance A, B, D, DE, RE Inputs (Note 4) 3 pF
Open-Circuit Input Voltage V
DD
= 5V (Note 4), Figure 5 3.2 3.3 3.4 V
Fail-Safe Time to Detect Fail-Safe Condition 2 µs
Time
CMRR Receiver Input Common Mode V
CM
= 2.5V, f = 26MHz 45 dB
Rejection Ratio
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
PLH
, t
PHL
Driver Input-to-Output Propagation Delay R
DIFF
= 54, Figures 3, 5 LTC1686C/LTC1687C 15 18.5 22 ns
C
L1
= C
L2
= 100pF LTC1686I/LTC1687I 13 18.5 25 ns
t
SKEW
Driver Output A-to-Output B Skew R
DIFF
= 54, C
L1
= C
L2
= 100pF, 500 ps
Figures 3, 5
t
r
, t
f
Driver Rise/Fall Time R
DIFF
= 54, C
L1
= C
L2
= 100pF, 3.5 ns
Figures 3, 5
t
ZH
Driver Enable to Output High C
L
= 100pF, S2 Closed, Figures 4, 6 25 50 ns
t
ZL
Driver Enable to Output Low C
L
= 100pF, S1 Closed, Figures 4, 6 25 50 ns
t
LZ
Driver Disable from Low C
L
= 15pF, S1 Closed, Figures 4, 6 25 50 ns
t
HZ
Driver Disable from High C
L
= 15pF, S2 Closed, Figures 4, 6 25 50 ns
t
PLH
, t
PHL
Receiver Input-to-Output Propagation Delay C
L
= 15pF, Figures 3, 7 LTC1686C/LTC1687C 15 18.5 22 ns
LTC1686I/LTC1687I
13 18.5 25 ns
t
SQD
Receiver Skew t
PLH
– t
PHL
C
L
= 15pF, Figures 3, 7 500 ps
t
ZL
Receiver Enable to Output Low C
L
= 15pF, S1 Closed, Figures 2, 8 25 50 ns
t
ZH
Receiver Enable to Output High C
L
= 15pF, S2 Closed, Figures 2, 8 25 50 ns
t
LZ
Receiver Disable from Low C
L
= 15pF, S1 Closed, Figures 2, 8 25 50 ns
t
HZ
Receiver Disable from High C
L
= 15pF, S2 Closed, Figures 2, 8 25 50 ns
Maximum Receiver Input (Note 4) 2000 ns
Rise/Fall Times
t
PKG-PKG
Package-to-Package Skew C
L
= 15pF, Same Temperature (Note 4) 1.5 ns
SWITCHING CHARACTERISTICS
U
V
DD
= 5V, unless otherwise noted (Notes 2, 3).