8
LTC2844
sn2844 2844fs
ODE SELECTIO
W
U
(Note 2) (Note 2) (Note 2) (Note 2) (Note 3) (Note 3) (Note 3)
R1 R2 R3 R4A R1 R2 R4
ABABAB R3
V.11 V.11 V.11 V.11 V.11 V.11 30k CMOS CMOS Z
V.11 V.11 V.10 30k V.11 V.11 30k CMOS CMOS Z
V.11 V.11 V.11 V.11 V.11 V.11 30k CMOS CMOS Z
V.11 V.11 V.11 V.11 V.11 V.11 30k CMOS CMOS Z
V.28 30k V.28 30k V.28 30k 30k CMOS CMOS Z
V.11 V.11 V.11 V.11 V.11 V.11 30k CMOS CMOS Z
V.28 30k V.28 30k V.28 30k 30k CMOS CMOS Z
30k 30k 30k 30k 30k 30k 30k Z Z Z
30k 30k V.11 V.11 V.11 V.11 V.10 Z CMOS CMOS
30k 30k V.10 30k V.11 V.11 V.10 Z CMOS CMOS
30k 30k V.11 V.11 V.11 V.11 V.10 Z CMOS CMOS
30k 30k V.11 V.11 V.11 V.11 V.10 Z CMOS CMOS
30k 30k V.28 30k V.28 30k V.28 Z CMOS CMOS
30k 30k V.11 V.11 V.11 V.11 V.10 Z CMOS CMOS
30k 30k V.28 30k V.28 30k V.28 Z CMOS CMOS
30k 30k 30k 30k 30k 30k 30k Z Z Z
(Note 1) (Note 1) (Note 1)
MODE NAME M2 M1 M0 DCE D1 D3 D4 D1 D2 D3 D4A
/DTE D2 ABABAB
Not Used
(Default V.11) 0000TTLXTTLV.11V.11V.11V.11ZZV.10
RS530A 0010TTLXTTLV.11V.11V.10ZZZV.10
RS530 0100TTLXTTLV.11V.11V.11V.11ZZV.10
X.21 0110TTLXTTLV.11V.11V.11V.11ZZV.10
V.35 1000TTLXTTLV.28ZV.28ZZZV.28
RS449/V.36 1010TTLXTTLV.11V.11V.11V.11ZZV.10
V.28/RS232 1100TTLXTTLV.28ZV.28ZZZV.28
No Cable 1110XXXZZZZZZZ
Not Used
(Default V.11) 0001TTLTTLXV.11V.11V.11V.11V.11V.11Z
RS530A 0011TTLTTLXV.11V.11V.10ZV.11V.11Z
RS530 0101TTLTTLXV.11V.11V.11V.11V.11V.11Z
X.21 0111TTLTTLXV.11V.11V.11V.11V.11V.11Z
V.35 1001TTLTTLXV.28ZV.28ZV.28ZZ
RS449/V.36 1011TTLTTLXV.11V.11V.11V.11V.11V.11Z
V.28/RS232 1101TTLTTLXV.28ZV.28ZV.28ZZ
No Cable 1111XXXZZZZZZZ
MODE NAME M2 M1 M0 DCE
/DTE
Not Used
(Default V.11) 0 0 0 0
RS530A 0 0 1 0
RS530 0 1 0 0
X.21 0 1 1 0
V.35 1 0 0 0
RS449/V.36 1 0 1 0
V.28/RS232 1 1 0 0
No Cable 1 1 1 0
Not Used
(Default V.11) 0 0 0 1
RS530A 0 0 1 1
RS530 0 1 0 1
X.21 0 1 1 1
V.35 1 0 0 1
RS449/V.36 1 0 1 1
V.28/RS232 1 1 0 1
No Cable 1 1 1 1
Note 1: Driver inputs are TTL level compatible.
Note 2: Unused receiver inputs are terminated with 30k to ground.
Note 3: Receiver outputs are CMOS level compatible and have a weak pull-up to V
IN
when Z.