Datasheet
3
LTC1485
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
PLH
Driver Input to Output R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF ● 10 30 50 ns
(Figures 2, 5)
t
PHL
Driver Input to Output R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF ● 10 30 50 ns
(Figures 2, 5)
t
SKEW
Driver Output to Output R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF ● 410 ns
(Figures 2, 5)
t
r
, t
f
Driver Rise or Fall Time R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF ● 51525 ns
(Figures 2, 5)
t
ZH
Driver Enable to Output High C
L
= 100pF (Figures 4, 6) S2 Closed ● 40 70 ns
t
ZL
Driver Enable to Output Low C
L
= 100pF (Figures 4, 6) S1 Closed ● 40 70 ns
t
LZ
Driver Disable Time from Low C
L
= 15pF (Figures 4, 6) S1 Closed ● 40 70 ns
t
HZ
Driver Disable Time from High C
L
= 15pF (Figures 4, 6) S2 Closed ● 40 70 ns
t
PLH
Receiver Input to Output R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF (Figures 2, 7) ● 15 25 50 ns
t
PHL
Receiver Input to Output R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF (Figures 2, 7) ● 20 30 55 ns
t
SKEW
| t
PLH
– t
PHL
|R
DIFF
= 54Ω, C
L1
= C
L2
= 100pF (Figures 2, 7) ● 515 ns
Differential Receiver Skew
t
ZL
Receiver Enable to Output Low C
L
= 15pF (Figures 3, 8) S1 Closed ● 30 45 ns
t
ZH
Receiver Enable to Output High C
L
= 15pF (Figures 3, 8) S2 Closed ● 30 45 ns
t
LZ
Receiver Disable from Low C
L
= 15pF (Figures 3, 8) S1 Closed ● 30 45 ns
t
HZ
Receiver Disable from High C
L
= 15pF (Figures 3, 8) S2 Closed ● 30 45 ns
S
U
GC CHARA TERIST
ICS
WI
TCH
I
V
CC
= 5V (Notes 2, 3), unless otherwise noted.
The ● denotes specifications which apply over the operating temperature
range.
Note 1: Absolute Maximum Ratings are those values beyond which the
safety of the device cannot be guaranteed.
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 V
CC
= 5V and T
A
= 25°C.
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
Receiver Output High Voltage vs
Temperature
Receiver Output Low Voltage vs
Output Current
Receiver Output High Voltage vs
Output Current
OUTPUT VOLTAGE (V)
0
0
OUTPUT CURRENT (mA)
16
1.0
1485 G01
8
0.5 1.5
24
32
2.0
4
12
20
28
36
T
A
= 25°C
OUTPUT VOLTAGE (V)
5
0
OUTPUT CURRENT (mA)
–8
1485 G02
–4
43
–12
–16
2
–2
–6
–10
–14
–18
T
A
= 25°C
TEMPERATURE (°C)
–50
3.0
OUTPUT VOLTAGE (V)
3.8
50
1485 G03
3.4
–25 125
4.2
4.6
0
25
75 100
4.8
4.4
4.0
3.6
3.2
I = 8mA