BQ20Z90_07 Datasheet, PDF (2/27 Pages) Texas Instruments – SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK™ TECHNOLOGY FOR USE WITH THE bq29330

bq20z90
SLUS662A – DECEMBER 2005 – REVISED JUNE 2006
SYSTEM PARTITIONING DIAGRAM
Pack +
SMBus
HDQ
Pack -
16 Dig GPIO & Peripherals
8 Dig GPIO or Analog GPI
32kHz Oscillator and 8MHz System Clock
System Interface
2k Bytes of
Data Flash
2k Bytes
of RAM
6k x 22
Mask ROM
24k x 22 Program
Flash
Standard Delta-Sigma A to D Converter
Integrating Delta-Sigma A to D Converter
Fuse
Discharge / Charge /
Pre-Charge FETs
2.5V / 3.3V (LED)
Reset
32.768kHz
I²C
T1
LDO + Nch FET Drive
Reset (Charge Pumps)
Watchdog &
Protection Timing
System Interface
RAM Configuration, Status
and Control Registers
TOUT and LEDOUT
Power Support
Analog Output Drive
2-Tier Over Current
Protection
Precharge
Control
TSSOP (DBT)
(TOP VIEW)
NC 1
XALERT 2
SDATA 3
SCLK 4
CLKOUT ⁵
TS1 6
TS2 7
PRES 8
PFIN 9
SAFE 10
SMBD 11
NC 12
SMBC 13
DISP 14
NC 15
30 _VCELL-
29 _VCELL+
28 _NC
27 _RBI
26 _VCC
25 _VSS
24 _MRST
23 _SRN
22 _SRP
21 _*VSS
20 _LED5
19 _LED4
18 _LED3
17 _LED2
16 _LED1
NC - No internal connection
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