LTC1321 LINER [Linear Technology], LTC1321 Datasheet - Page 4

• Manufacturer Part Number: LTC1321
• Description: RS232/EIA562/RS485 Transceivers
• Manufacturer: LINER [Linear Technology]

DC ELECTRICAL CHARACTERISTICS
V
AC
LTC1321/LTC1322/LTC1335
SYMBOL
Supply Currents
I
I
I
DC ELECTRICAL CHARACTERISTICS
V
SYMBOL
EIA/TIA-562 Mode (SEL1 = SEL2 = LOW)
SR
t
t
t
t
t
RS485 Mode (SEL1 = SEL2 = HIGH)
t
t
t
t
t
t
t
t
t
t
t
Receiver Output Enable/Disable (LTC1335)
t
t
t
t
The
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.
4
CC
DD
EE
LZ
HZ
SKEW
ZL
ZH
LZ
HZ
SKEW
r
T
PLH
PHL
PLH
PHL
PLH
PHL
ZL
ZH
PLH
PHL
CC
CC
, t
f
= V
= V
denotes specifications which apply over the full operating
DD
DD
(LTC1321/LTC1322) = 5V 5%, V
(LTC1321/LTC1322) = 5V 5%, V
PARAMETER
V
V
V
PARAMETER
Slew Rate
Transition Time
Driver Input to Output
Driver Input to Output
Receiver Input to Output
Receiver Input to Output
Driver Input to Output
Driver Input to Output
Driver Output to Output
Driver Rise or Fall Time
Driver Enable to Output Low
Driver Enable to Output High
Driver Disable from Low
Driver Disable from High
Receiver Input to Output
Receiver Input to Output
Differential Receiver Skew, t
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable from Low
Receiver Disable from High
CC
DD
EE
Supply Current
Supply Current
Supply Current (LTC1321/LTC1322)
PLH
-t
PHL
EE
EE
= – 5V 5% (Notes 2, 3)
= – 5V 5% (Notes 2, 3)
CONDITIONS
No Load (SEL1 = SEL2 = HIGH)
Shutdown, ON/OFF = 0V
No Load (SEL1 = SEL2 = LOW)
Shutdown, ON/OFF = 0V
No Load (SEL1 = SEL2 = HIGH)
Shutdown, ON/OFF = 0V
CONDITIONS
Figure 4, R
Figure 4, R
Figure 4, R
Figures 4,10, R
Figures 4,10, R
Figures 5,11
Figures 5,11
Figures 2,7, R
Figures 2,7, R
Figures 2,7, R
Figures 2,7, R
Figures 3,8, C
Figures 3,8, C
Figures 3,8, C
Figures 3,8, C
Figures 2,9, R
Figures 2,9, R
Figures 2,9, R
Figures 6,12, C
Figures 6,12, C
Figures 6,12, C
Figures 6,12, C
L
L
L
= 3k, C
= 3k, C
= 3k, C
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
= 100pF, S1 Closed
= 100pF, S2 Closed
= 15pF, S1 Closed
= 15pF, S2 Closed
= 54 , C
= 54 , C
= 54 , C
= 54 , C
= 54 , C
= 54 , C
= 54 , C
Note 3: All typicals are given at V
V
Note 4: Short-circuit current for RS485 driver output low state folds back
above V
= 15pF, S1 Closed
= 15pF, S2 Closed
= 15pF, S1 Closed
= 15pF, S2 Closed
= 3k, C
= 3k, C
EE
L
L
L
= – 5V, and T
= 15pF
= 1000pF
= 2500pF
CC
L
L
L
L
L
L
L
L
L
= 15pF
= 15pF
. Peak current occurs around V
= 100pF
= 100pF
= 100pF
= 100pF
= 100pF
= 100pF
= 100pF
A
= 25 C.
CC
= V
0.22
MIN
MIN
20
20
20
20
4
3
DD
O
(LTC1321/LTC1322) = 5V,
= 3V.
– 1000
1000
– 0.1
TYP
300
TYP
0.1
1.9
0.6
0.6
0.3
0.4
15
14
40
40
15
50
50
50
60
60
70
10
40
40
40
50
7
5
– 2000
2000
1000
MAX
MAX
– 50
140
140
3.1
50
50
30
70
70
15
40
90
90
90
90
90
90
90
90
4
4
6
6
UNITS
UNITS
V/ s
V/ s
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
A
A
A
A
A
A
s
s
s
s
s