Pin Specifications

Pin Configuration

Pin Description

PIN	NAME	FUNCTION
1	RADDR	Device ID Resistor. Connect a resistor value from RADDR to GND to set the UART Device ID.
2	RGRADE	LED Binning Resistor Connection. Connect a LED binning resistor from this pin to GND.
3, 26	RX	UART Receive Input. If the driver to this pin is CMOS output, no pull-up resistor is needed. If the driver to this pin is open drain, add a 1.5kΩ pull-up resistor.
4, 25	TX	UART Transmit Output. Add a 1.5kΩ pull-up resistor.
5	CLKIN	CLK Input. Can be optionally used to sync the device with an external digital clock signal.
6	RTEMP	NTC Divider ADC Input. Connect to NTC resistor divider to enable remote temperature sensing.
7	VDD	LDO Output. Nominal voltage is 1.8V. Connect a bypass capacitor between VDD and GND.
8	DR12	Drain of Internal Switch 12. Add a 0.1μF capacitor from DR12 to GND.
9	DR11	Drain of Internal Switch 11.
10	DR10	Drain of Internal Switch 10.
11	DR9	Drain of Internal Switch 9.
12	DR8	Drain of Internal Switch 8.
13	DR7	Drain of Internal Switch 7.
14	SRC7	Source of Internal Switch 7.
15	DR6	Drain of Internal Switch 6. For two-string applications, connect a 0.1μF ceramic capacitor from DR6 to GND.
16	DR5	Drain of Internal Switch 5.
17	DR4	Drain of Internal Switch 4.
18	DR3	Drain of Internal Switch 3.
19	DR2	Drain of Internal Switch 2.
20	DR1	Drain of Internal Switch 1.
21	SRC1	Source of Internal Switch 1.
22	CPP	Charge Pump Capacitor Positive Connection. Connect a 0.1µF ceramic capacitor from CPP to CPN.
23	CPN	Charge Pump Capacitor Negative Connection. Connect a 0.1µF from CPP to CPN.
24	CLKOUT	After startup, can be optionally configured with UART to drive a clock signal to other devices, or act as a pass-through for the CLKIN input.
27	FLT	Open-Drain Fault Indicator. Goes low when a fault condition is present.
28	IN	Connect external bypass capacitor to GND.
—	EP/GND	Exposed Pad Ground Connection. Connect this pad to a contiguous ground plane.