Datasheet

3
LTC1685
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
PLH
, t
PHL
Driver Input-to-Output R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF, Figures 3, 5,
Propagation Delay LTC1685C
● 15 18.5 22 ns
LTC1685I
● 13 18.5 25 ns
t
SKEW
Driver Output A-to-Output R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF, 500 ps
B Skew Figures 3, 5
t
r
, t
f
Driver Rise/Fall Time R
DIFF
= 54Ω, 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 C
L
= 15pF, Figures 3, 7
Propagation Delay LTC1685C
● 15 18.5 22 ns
LTC1685I
● 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 Same Temperature (Note 4) 1.5 ns
Minimum Input Pulse Width V
DD
= 5V ± 5% (Note 4)
LTC1685C
● 17 19.2 ns
LTC1685I
● 20 25 ns
Maximum Data Rate V
DD
= 5V ± 5% (Note 4)
LTC1685C
● 52 60 Mbps
LTC1685I
● 40 50 Mbps
Maximum Input Frequency V
DD
= 5V ± 5% (Note 4)
LTC1685C
● 26 30 MHz
LTC1685I
● 20 25 MHz
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
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 kΩ
C
IN
Input Capacitance A, B Inputs, D, DE, RE 3 pF
Open-Circuit Input Voltage, Figure 5 V
DD
= 5V (Note 4) ● 3.2 3.3 3.4 V
Fail-Safe Time Time to Detect Fail-Safe Condition 2 µs
CMRR Receiver Input Common Mode Rejection Ratio V
CM
= 2.6V, f = 26MHz 45 dB
C
LOAD
Receiver and Driver Output Load Capacitance (Note 4) ● 500 pF
DC ELECTRICAL CHARACTERISTICS
SWITCHING CHARACTERISTICS
U
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
= 5V ±5%, unless otherwise noted. (Notes 2, 3)
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
= 5V, unless otherwise noted. (Notes 2, 3)