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BQ20851 Fiches technique(PDF) 3 Page - Texas Instruments

No de pièce BQ20851
Description  SBS COMPLIANT GAS GAUGE IC FOR USE WITH THE BQ29311
Download  53 Pages
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Fabricant  TI [Texas Instruments]
Site Internet  http://www.ti.com
Logo TI - Texas Instruments

BQ20851 Fiches technique(HTML) 3 Page - Texas Instruments

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bq20851-V1P2
SLUS575 − AUGUST 2003
www.ti.com
3
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME
No.
I/O
DESCRIPTION
CLKOUT
35
I
32.768-kHz output to the bq29311
DISP
17
I
Display control for the LED drivers LED1 through LED5
FILT
32
I
Analog input connected to the external PLL filter
EVENT
18
I
Input from bq29311 XALERT output
LED1
37
O
LED2
36
O
LED3
5
O
LED display segments that each may drive an external LED
LED4
4
O
LED display segments that each may drive an external LED
LED5
3
O
MRST
26
I
Master reset input that forces the device into reset when held high
N/C
20−24, 7, 13,
14, 25,
No connection
RBI
9
I
Register backup that provides backup potential to the bq20851−V1P2 data registers during periods of low
operating voltage. RBI accepts a storage capacitor or a battery input.
ROSC
33
I
Internal time base bias input
SAFE
12
O
Output for additional level of safety protection; e.g., fuse blow.
SCLK
6
O
Communication clock to the bq29311
SDATA
10
I/O
Data transfer to and from bq29311
SMBC
15
I/O
SMBus clock open-drain bidirectional pin used to clock the data transfer to and from the bq20851−V1P2
SMBD
16
I/O
SMBus data open-drain bidirectional pin used to transfer address and data to and from the bq20851−V1P2
SR1
28
I
Connections for a small-value sense resistor to monitor the battery charge- and discharge-current flow
SR2
27
I
Connections for a small-value sense resistor to monitor the battery charge- and discharge-current flow
TS
2
I
Thermistor voltage input connection to monitor temperature
VDDA
31
I
Positive supply for analog circuitry
VDDD
8
I
Positive supply for digital circuitry and I/O pins
VIN
1
I
Single cell voltage input from the bq29311
VSSA
30, 34
I
Negative supply for analog circuitry
VSSD
11, 19, 38
I
Negative supply for digital circuitry
VSSP
29
I
Negative supply for output circuitry


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