Pin Specifications

Pin Description
PIN	NAME	FUNCTION	TYPE
1	1	V_L	Logic Supply Input. V_L defines the levels on all I/O logic interface pins. Bypass V_L to GND through a 100nF ceramic capacitor.	Supply
2	2	GND	Analog Ground	Supply
3	3	CLIM	Current Limit Set Input. Connect a resistor from CLIM to GND to set the current limit. See Detailed Description for further information.	Analog Input
4	4	FAULT	Open-Drain Fault Output. The FAULT transistor turns on when a fault condition (driver thermal shutdown or loss of ground) occurs. Connect a pullup to V_L or V₅.	Logic Output
5	5	DOI_LVL	Open-Drain DOI Level Output. DOI_LVL is logic-low when DOI voltage is higher than the threshold voltage. DOI_LVL is logic-high (using a pullup resistor) when DOI voltage is lower than the threshold voltage. The threshold voltage depends on DI_EN. Connect a pullup to V_L or V₅.	Logic Output
6	6	DI_EN	Digital Input Mode Logic Enable Input. Set DI_EN high to enable digital input operation on the DOI pin, which enables the internal current sink and sets Type 1, Type 2, or Type 3 thresholds on DOI_LVL. Select between Type 1 and 3, and Type 2 DI characteristics through the PP input.	Analog
7	7	IN	Switch Control Input. Drive IN high to close the HS switch; drive IN low to open the HS switch and close the LS switch (when PP = low).	Logic Input
8	8	PP	Push-Pull DO or DI Type Select Input. In DO mode, set PP high to enable push-pull mode operation of the DO driver. In DI mode, set PP low for IEC Type 1/3 input characteristics and set high for Type 2 input characteristics.	Logic Input
9	9	PGND	Power Ground	Supply
10, 11	10, 11	DOI	High-Side / Push-Pull Output (DI_EN = low) or Digital Input (DI_EN = high). Connect both DOI pins together externally.	Power
12, 13	12, 13	V_DD	Supply Voltage, Nominally 24V. Bypass V_DD to GND through a 1uF capacitor.	Supply
14	14	REGIN	5V Regulator Input. Connect REGIN to V_DD when using the internal 5V regulator. Connect REGIN to V₅ when powering V₅ from an external regulator.	Supply
15	—	OV_VDD	Open-Drain Overvoltage Output for the MAX14914 and MAX14914A. The OV_VDD transistor turns off when: 1) a device configured for DI operation; 2) DOI level is higher than V_DD. Connect a pullup to V_DD.
—	15	OV_CURR	Open-Drain Overcurrent Output for the MAX14914B. OV_CURR turns active low when the load current exceeds the high-side current limit. Connect a pullup resistor between OV_CURR and V_L.
16	16	V₅	Analog Supply Voltage/LDO Output. The MAX14914 requires a 5V supply for normal operation, which can come from the internal linear regulator (REGIN connected to V_DD) or from an external regulator (REGIN connected to V₅). Bypass to GND through a 1μF ceramic capacitor.	Supply
—	—	EP	Exposed Pad. Connect EP to GND.

1

V_L

Logic Supply Input. V_L defines the levels on all I/O logic interface pins. Bypass V_L to GND through a 100nF ceramic capacitor.

Supply

2

GND

Analog Ground

Supply

3

CLIM

Current Limit Set Input. Connect a resistor from CLIM to GND to set the current limit. See Detailed Description for further information.

Analog Input

4

FAULT

Open-Drain Fault Output. The FAULT transistor turns on when a fault condition (driver thermal shutdown or loss of ground) occurs. Connect a pullup to V_L or V₅.

Logic Output

5

DOI_LVL

Open-Drain DOI Level Output. DOI_LVL is logic-low when DOI voltage is higher than the threshold voltage. DOI_LVL is logic-high (using a pullup resistor) when DOI voltage is lower than the threshold voltage. The threshold voltage depends on DI_EN. Connect a pullup to V_L or V₅.

Logic Output

6

DI_EN

Digital Input Mode Logic Enable Input. Set DI_EN high to enable digital input operation on the DOI pin, which enables the internal current sink and sets Type 1, Type 2, or Type 3 thresholds on DOI_LVL. Select between Type 1 and 3, and Type 2 DI characteristics through the PP input.

Analog

7

IN

Switch Control Input. Drive IN high to close the HS switch; drive IN low to open the HS switch and close the LS switch (when PP = low).

Logic Input

8

PP

Push-Pull DO or DI Type Select Input. In DO mode, set PP high to enable push-pull mode operation of the DO driver. In DI mode, set PP low for IEC Type 1/3 input characteristics and set high for Type 2 input characteristics.

Logic Input

9

PGND

Power Ground

Supply

10, 11

DOI

High-Side / Push-Pull Output (DI_EN = low) or Digital Input (DI_EN = high). Connect both DOI pins together externally.

Power

12, 13

V_DD

Supply Voltage, Nominally 24V. Bypass V_DD to GND through a 1uF capacitor.

Supply

14

REGIN

5V Regulator Input. Connect REGIN to V_DD when using the internal 5V regulator. Connect REGIN to V₅ when powering V₅ from an external regulator.

Supply

15

—

OV_VDD

Open-Drain Overvoltage Output for the MAX14914 and MAX14914A. The OV_VDD transistor turns off when: 1) a device configured for DI operation; 2) DOI level is higher than V_DD. Connect a pullup to V_DD.

—

15

OV_CURR

Open-Drain Overcurrent Output for the MAX14914B. OV_CURR turns active low when the load current exceeds the high-side current limit. Connect a pullup resistor between OV_CURR and V_L.

16

V₅

Analog Supply Voltage/LDO Output. The MAX14914 requires a 5V supply for normal operation, which can come from the internal linear regulator (REGIN connected to V_DD) or from an external regulator (REGIN connected to V₅). Bypass to GND through a 1μF ceramic capacitor.

Supply

—

EP

Exposed Pad. Connect EP to GND.