MAX14890E Datasheet, PDF (14/30 Pages) Maxim Integrated Products – Overvoltage and Undervoltage Fault Detection

MAX14890E
Incremental Encoder Interface for RS-422,
HTL, and TTL with Digital Inputs
Pin Description (continued)
PIN
NAME
FUNCTION
Receiver D2 Open-Drain Fault Output/SPI IRQ Output.
7
D2FAULT/ In pin mode (SPI is low), D2FAULT/IRQ asserts low during a fault condition on the D2 receiver (RxD2).
IRQ
In SPI mode (SPI is high), D2FAULT/IRQ asserts low when a fault bit is set. See the Serial SPI Control
section for more information.
8
BO
Receiver B Output.
9
B
Non-Inverting RS-422/HTL/TTL Input for Receiver B.
10
B
Inverting Input for Receiver B. B is only used when differential mode is enabled.
11
GND
Ground
12
LO2
Receiver DI2 Output.
13
DI2
Digital/TTL Input for DI2 Receiver.
14
DI/TTL2
Digital Input/TTL Select Input for DI2 Receiver. See the Truth Tables for more information. DI/TTL2 has
no function in SPI mode (SPI is high).
15
Y
Inverting RS-422 Input for Receiver Y. Y is used only when differential mode is enabled.
16
DIY
Digital/TTL/Non-inverting RS-422 Input for Receiver Y.
17
YO
Receiver Y Output.
18
DI/TTLY
Digital Input/TTL/RS-422 Select Input for Receiver Y. See the Truth Tables for more information. DI/
TTLY has no function in SPI mode (SPI is high).
19
YFAULT
Open-Drain Fault Output for Receiver Y. YFAULT asserts low during a fault condition on receiver Y.
See the Fault Conditions section for more information.
20
ZFAULT
Open-Drain Fault Output for Receiver Z. ZFAULT asserts low during a fault condition on receiver Z.
See the Fault Conditions section for more information.
21
BFAULT
Open-Drain Fault Output for Receiver B. BFAULT asserts low during a fault condition on receiver B.
See the Fault Conditions section for more information.
22
V_L
Logic Interface Supply Input. V_CC must always be greater than or equal to V_L.
23
SPI
Serial/Parallel Select Input. Drive SPI low to enable pin-mode operation. Drive SPI high to enable SPI
mode operation.
24
ZO
Receiver Z Output.
25
Z
Non-Inverting RS-422/HTL/TTL Input for Receiver Z.
26
Z
Inverting Input for Receiver Z. Z is only used when the receiver is configured for differential mode.
27
V_CC
Supply Input. Bypass V_CC to ground through a 0.1μF capacitor as close to the device as possible.
V_CC must always be greater than or equal to V_L.
28
LO3
Receiver D3 Output.
29
DI3
Digital/TTL Input for the D3 Receiver.
30
DI/TTL3
Digital Input/TTL Select Input for the D3 Receiver. See the Truth Tables for more information. DI/TTL3
has no function in SPI mode (SPI is high).
31
A
Inverting Input for Receiver A. A is used only when differential mode is enabled.
32
A
Non-inverting RS-422/HTL/TTL Input for Receiver A.
-
EP
Exposed pad. Connect EP to ground. Not intended as the primary ground connection.
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