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2 DEVICE INFORMATION

2.1 AVAILABLE OPTIONS

2.2 PIN DIAGRAMS

BAT
VSS
SRN
SRP
VCC
BAT_GD
SDA
SCL
1
2
3
4
5
6
12
11
10
9
8
7
BAT_LOW_
TS
1
2
3
4
5
6
12
11
10
9
8
7
BI/TOUT
BAT
VSS
VCC
BAT_LOW_
TS
BI/TOUT
NC
SRN
SRP
BAT_GD
SDA
SCL
RID
bq27500 bq27501

2.3 TERMINAL FUNCTIONS

bq27500
bq27501System-Side Impedance Track™ Fuel Gauge
SLUS785 – SEPTEMBER 2007
COMMUNICATION TAPE and REELPART NUMBER PACKAGE
(1)
T
A
FORMAT QUANTITY
bq27500DRZR 3000
bq27500DRZT 30012-pin, 2,5 mm x 4,0 mm
–40 °C to 85 °C I
2
CSONbq27501DRZR
(2)
3000
bq27501DRZT
(2)
300
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TIwebsite at www.ti.com .(2) Product Preview
TERMINAL
I/O
(1)
DESCRIPTIONNAME NAMEPIN NO.
bq27500 bq27501
Battery Low output indicator. Active high by default, though polarity can be configured1 BAT_LOW BAT_LOW O
through the [BATL_POL] in Operation Configuration Push-pull output.
Battery-insertion detection input. Power pin for pack thermistor network. Thermistor2 BI/TOUT BI/TOUT I/O
multiplexer control pin. Open-drain I/O. use with pull-up resistor > 1M Ω(1.8M Ωtypical)
3 TS TS P Pack thermistor voltage sense (use 103AT-type thermistor). ADC input.
4 BAT BAT I Cell-voltage measurement input. ADC input.
5 V
CC
V
CC
P Processor power input. Decouple with 0.1 μF capacitor, minimum.
6 V
SS
V
SS
P Device ground.
Analog input pin connected to the internal coulomb-counter where SRP is nearest the7 SRP SRP IA
CELL- connection. Connect to 5-20m Ωsense resistor.
Analog input pin connected to the internal coulomb-counter where SRN is nearest the8 SRN SRN IA
PACK- connection. Connect to 5-20m Ωsense resistor.
No connection (bq27500). Resistor ID input (bq27501). Analog input with current sourcing9 NC RID –, I
capabilities.
Slave I
2
C serial communications data line for communication with system ( Master).10 SDA SDA I/O
Open-drain I/O. Use with 10k Ωpull-up resistor (typical).
Slave I
2
C serial communications clock input line for communication with system ( Master).11 SCL SCL I
Open-drain I/O. Use with 10k Ωpull-up resistor (typical).
Battery Good indicator. Active low by default, though polarity can be configured through12 BAT_GD BAT_GD O
the [BATG_POL] of Operation Configuration. Open-drain output.
(1) I/O = Digital Input/Output, IA = Analog Input, P = Power Connection
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