ISL78610 Datasheet, PDF (6/98 Pages) Intersil Corporation – Multi-Cell Li-Ion Battery Manager

ISL78610
Pin Descriptions (Continued)
SYMBOL
VDDEXT
REF
VCC
V2P5
V3P3
BASE
DNC
COMMS SELECT 1
COMMS SELECT 2
COMMS RATE 0,
COMMS RATE 1
DGND
FAULT
DATA READY
EN
DOUT/NC
DIN/NC
CS/DLo1
SCLK/DHi1
DHi2
DLo2
NC
PIN NUMBER
DESCRIPTION
32
External V3P3 supply input/output. Connected to the V3P3 pin via a switch, this pin may be used to power
external circuits from the V3P3 supply. The switch is open when the ISL78610 is placed in Sleep mode.
33
2.5V voltage reference decoupling pin. Connect a 2.0µF to 2.5µF X7R capacitor to VSS. Do not connect any
additional external load to this pin.
34
Analog supply voltage input. Connect to V3P3 via a 33Ω resistor. Connect a 1µF capacitor to ground.
35
Internal 2.5V digital supply decoupling pin. Connect a 1µF capacitor to DGND.
36
3.3V digital supply voltage input. Connect the emitter of the external NPN regulator transistor to this pin.
Connect a 1µF capacitor to DGND.
38
Regulator control pin. Connect the external NPN transistor’s base. Do not let this pin float.
37, 39, 48 Do not connect. Leave pins floating.
41
Communications Port 1 mode select pin. Connect via a 1kΩ resistor to V3P3 for daisy chain
communications on Port 1 or to DGND for SPI operation on Port 1.
40
Communications Port 2 mode select pin. Connect via a 1kΩ resistor to V3P3 to enable Port 2 or to DGND
to disable this port.
43, 42
Daisy chain communications data rate setting. Connect via a 1kΩ resistor to DGND (0) or to V3P3 (1) to
select between various communication data rates.
44
Digital Ground.
45
Logic fault output. Asserted low if a fault condition exists.
46
SPI data ready. Asserted low when the device is ready to transmit data to the host microcontroller.
47
Enable input. Tie to V3P3 to enable the part. Tie to DGND to disable (all IC functions are turned off).
49
Serial Data Output (SPI) or NC (daisy chain). 0V to 3.3V push-pull output.
50
Serial Data Input (SPI) or NC (daisy chain). 0V to 3.3V input.
52
Chip-select, active low 3.3V input (SPI) or daisy chain Port 1 Lo connection.
53
Serial-Clock Input (SPI) or daisy chain Port 1 Hi connection.
56
Daisy chain Port 2 High connection.
55
Daisy chain Port 2 Low connection.
23, 25, 27, No internal connection.
31, 51, 54, 57
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FN8830.1
June 16, 2016