4
LTC1543
sn1534 1543fas
Note 1: Absolute Maximum Ratings are those beyond which the safety of a
device may be impaired.
Note 2: All currents into device pins are positive; all currents out of device
are negative. All voltages are referenced to device ground unless otherwise
specified.
Note 3: All typicals are given for V
CC
= 5V, C1 = C2 = C
VCC
= 1µF,
C
VDD
= C
VEE
= 3.3µF tantalum capacitors and T
A
= 25°C.
The ● denotes specifications which apply over the full operating tempera-
ture range. V
CC
= 5V (Notes 2, 3)
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
OZ
Transmitter Output Leakage Current –0.25V ≤ V
A, B
≤ 0.25V ● ±1 ±100 µA
t
r
, t
f
Rise or Fall Time (Figures 3, 6) 5 ns
t
PLH
Input to Output (Figures 3, 6) (LTC1543C) ● 20 35 65 ns
(Figures 3, 6) (LTC1543I)
● 20 35 75 ns
t
PHL
Input to Output (Figures 3, 6) (LTC1543C) ● 20 35 65 ns
(Figures 3, 6) (LTC1543I)
● 20 35 75 ns
∆t Input to Output Difference, t
PLH
– t
PHL
(Figures 3, 6) (LTC1543C) ● 0416 ns
(Figures 3, 6) (LTC1543I)
● 0421 ns
t
SKEW
Output to Output Skew (Figures 3, 6) 4 ns
V.35 Receiver
V
TH
Differential Receiver Input Threshold Voltage –2V ≤ (V
A
+ V
B
)/2 ≤ 2V (Figure 3) ● –0.2 0.2 V
∆V
TH
Receiver Input Hysteresis –2V ≤ (V
A
+ V
B
)/2 ≤ 2V (Figure 3) ● 15 40 mV
I
IN
Receiver Input Current (A, B) –10V ≤ V
A,B
≤ 10V ● ±0.66 mA
R
IN
Receiver Input Impedance –10V ≤ V
A,B
≤ 10V ● 15 30 kΩ
t
r
, t
f
Rise or Fall Time (Figures 3, 7) 15 ns
t
PLH
Input to Output (Figures 3, 7) (LTC1543C) ● 50 80 ns
(Figures 3, 7) (LTC1543I)
● 50 90 ns
t
PHL
Input to Output (Figures 3, 7) (LTC1543C) ● 50 80 ns
(Figures 3, 7) (LTC1543I)
● 50 90 ns
∆t Input to Output Difference, t
PLH
– t
PHL
(Figures 3, 7) (LTC1543C) ● 0416 ns
(Figures 3, 7) (LTC1543I) ● 0421 ns
V.28 Driver
V
O
Output Voltage Open Circuit ● ±10 V
R
L
= 3k (Figure 4) ● ±5 ±8.5 V
I
SS
Short-Circuit Current V
OUT
= GND ● ±150 mA
I
OZ
Output Leakage Current –0.25V ≤ V
O
≤ 0.25V, Power Off or ● ±1 ±100 µA
No-Cable Mode or Driver Disabled
SR Slew Rate R
L
= 3k, C
L
= 2500pF (Figures 4, 8) ● 430V/µs
t
PLH
Input to Output R
L
= 3k, C
L
= 2500pF (Figures 4, 8) ● 1.5 2.5 µs
t
PHL
Input to Output R
L
= 3k, C
L
= 2500pF (Figures 4, 8) ● 1.5 3 µs
V.28 Receiver
V
THL
Input Low Threshold Voltage ● 1.2 0.8 V
V
TLH
Input High Threshold Voltage ● 2 1.2 V
∆V
TH
Receiver Input Hysteresis ● 0 0.05 0.3 V
R
IN
Receiver Input Impedance –15V ≤ V
A
≤ 15V ● 357 kΩ
t
r
, t
f
Rise or Fall Time (Figures 5, 9) 15 ns
t
PLH
Input to Output (Figures 5, 9) ● 60 100 ns
t
PHL
Input to Output (Figures 5, 9) ● 160 250 ns
