MAX14913 datasheet(14/30 Pages) MAXIM

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NAME

FUNCTION

PGND

Ground for the DC-DC Converter. Connect to GND.

Logic Supply Input. VL defines the levels on all I/O logic interface pins. Bypass VL to GND

through a 100nF ceramic capacitor.

17, 19, 22, 24,

26, 45, 47, 49,

52, 54

VDD (10x)

Supply Voltage, Nominally 24V. Connect all VDD together. Bypass VDD to GND through a 1µF

capacitor.

5V Supply Input. V5 can be powered by an external 5V supply or the internal 5V buck. Bypass

V5 to GND through a 10µF ceramic capacitor.

BUKEN

Enable Input for Buck Regulator. BUKEN should be permanently connected to either VDD or

GND—do not switch BUKEN. Connect BUKEN to GND if not using the internal buck. Connect

BUKEN to VDD to use the internal buck.

UVLO

UVLO is an Open-Drain, Undervoltage Indicator of the VDD Supply.

SERIAL INTERFACE

SDO

Serial-Data Output. SPI MISO data output to controller.

SDI

Serial-Data Input. SPI MOSI data from controller.

CLK

Serial-Clock Input from SPI Controller

Chip-Select Input from Controller

LOGIC INTERFACE

SRIAL

Serial/Parallel Select Input. Drive SRIAL high to set the MAX14912/MAX14913 outputs through

the serial interface. Drive SRIAL low to set the MAX14912/MAX14913outputs through the

parallel (_/IN) pins. SRIAL does not affect serial readback of diagnostic/status information.

OL/IN1

Open-Load Select Input/IN1 Input. In serial mode (SRIAL = high), drive OL/IN1 = high to enable

open-load detection on all eight OUT_ outputs when in high-side operation. In parallel mode

(SRIAL = low), OL/IN1 sets OUT1 on/off/high/low.

CMND/IN2

Command Mode SPI Input/IN2 Logic Input. In serial mode (SRIAL = high), CMND/IN2 enables

command-based SPI access (see Detailed Description section for details).

In parallel mode (SRIAL = low), CMND/IN2 sets OUT2 on/off/high/low.

CRC/IN3

CRC Select Input/IN3 Input. In serial mode (SRIAL = high), drive CRC/IN3 = high to enable CRC

error detection on serial data. In parallel mode (SRIAL = low), CRC/IN3 sets OUT3 on/off/high/

low.

CERR/IN4

CRC Error Detection Output/IN4 Input. In serial mode (SRIAL = high) with error checking

enabled (CRC/IN3 = high), CERR/IN4 is an open-drain output whose transistor turns on when

the device detects an error on SDI data. In parallel mode (SRIAL = low), CERR/IN4 sets OUT4

on/off/high/low.

WDEN/IN5

Watchdog Enable Input/ IN5 Input. In serial mode (SRIAL= high), WDEN/IN5 enables the

watchdog timer. In parallel mode (SRIAL= low), WDEN/IN5 sets OUT5 on/off/high/low.

WDFLT/IN6

Watchdog Fault Output/IN6 Input. In serial mode (SRIAL = high), WDFLT/IN6 is the open-drain

watchdog fault output, which turns on when a watchdog fault is detected while WDEN/IN5 is

high. In parallel mode (SRIAL = low), WDFLT/IN6 sets OUT6 on/off/high/low.

MAX14912/MAX14913

Octal High-Speed, High-Side

Switch/Push-Pull Driver

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Maxim Integrated │ 14

Pin Description (continued)

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