MAX14890E Datasheet, PDF (15/30 Pages) Maxim Integrated Products – Overvoltage and Undervoltage Fault Detection

MAX14890E
Incremental Encoder Interface for RS-422,
HTL, and TTL with Digital Inputs
Truth Tables
Table 1. RxA, RxB, RxZ and RxY Receiver Settings (Pin-Control Mode)
SNGL/CLK
L
L
L
L
H
H
H
H
INPUTS
TTL/SDI
L
L
H
H
L
L
H
H
DI/TTLY
L
H
L
H
L
H
L
H
RECEIVER OPERATION
RxA, RxB, RxZ
RxY
D-HTL
TTL
D-HTL
DI
RS-422
RS-422
RS-422
DI
SE-HTL
TTL
SE-HTL
DI
TTL
TTL
TTL
DI
Table 2. RxD2 Receiver Settings (Pin-
Control Mode)
DI/TTL2
L
RxD2 MODE OF
OPERATION
TTL
H
DI
Table 3. RxD3 Receiver Input Settings
(Pin-Control Mode)
DI/TTL3
L
H
RxD3 MODE OF
OPERATION
TTL
DI
Table 4. DI Mode Receiver Logic (RxY, RxD2, RxD3)
DIY, DI2, DI3
-40V < V_IN ≤ -18V
-18V < V_IN < -15V
-15V < V_IN < +6V
+6V < V_IN < +8V
+8V ≤ V_IN < +40V
YO, LO2, LO3
L
L
L
Indeterminate
H
_FAULT
L
Indeterminate
H
H
H
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