BQ2019PW Datasheet, PDF (2/27 Pages) Texas Instruments – ADVANCED BATTERY MONITORIC

bq2019
ADVANCED BATTERY MONITOR IC
SLUS465E – DECEMBER 1999 – REVISED FEBRUARY 2003
functional block diagram
VCC
REG
Bandgap
Voltage
+
Reference
_
SR
OSC
OSC
Temperature
Sensor
OSC
VFC
Serial
Interface
HDQ
STAT
Controller
ID ROM
3 × 8 RAM Scratch
RAM
32 × 8 Shadow
Flash
32 × 8 RAM
2 - 32 × 8 Pages of
Flash
Charge/Discharge,
Counters-Timers,
and Temperature
Registers
TERMINAL
NAME NO.
HDQ
4
DC
6
OSC
5
REG
1
SR
7
STAT
8
VCC
2
VSS
3
Terminal Functions
I/O
I/O Single-wire HDQ interface
I Internal connection only. Do not connect.
O Time-base adjust for the oscillator
O Regulator output
I Current-sense input
O Open-drain status output
I Supply voltage
Ground
DESCRIPTION
2
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