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BQ27741-G1 Datasheet(PDF) 11 Page - Texas Instruments

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Part # BQ27741-G1
Description  Single Cell Li-Ion Battery Fuel Gauge with Integrated Protection
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

BQ27741-G1 Datasheet(HTML) 11 Page - Texas Instruments

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t(B)
t(BR)
t(HW1)
t(HW0)
t(CYCH)
t(DW1)
t(DW0)
t(CYCD)
Break
7-bit address
8-bit data
(a) Break and Break Recovery
(c) Host Transmitted Bit
(d) Gauge Transmitted Bit
(e) Gauge to Host Response
1.2V
t(RISE)
(b) HDQ line rise time
1-bit
R/W
t(RSPS)
t(RST)
(f) HDQ Reset
bq27741-G1
www.ti.com
SLUSBF2A – JULY 2013 – REVISED SEPTEMBER 2013
HDQ Communication Timing Characteristics
TA = –40°C to 85°C, 2.4 V < VREG25 < 2.6 V; typical values at TA = 25°C and VREG25 = 2.5 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
t(CYCH)
Cycle time, host to fuel gauge
190
μs
t(CYCD)
Cycle time, fuel gauge to host
190
205
250
μs
t(HW1)
Host sends 1 to fuel gauge
0.5
50
μs
t(DW1)
Fuel gauge sends 1 to host
32
50
μs
t(HW0)
Host sends 0 to fuel gauge
86
145
μs
t(DW0)
Fuel gauge sends 0 to host
80
145
μs
t(RSPS)
Response time, fuel gauge to host
190
950
μs
t(B)
Break time
190
μs
t(BR)
Break recovery time
40
μs
t(RST)
HDQ reset
1.8
2.2
s
t(RISE)
HDQ line rise time to logic 1 (1.2 V)
950
ns
Figure 2. Timing Diagrams
(a) HDQ Breaking
(b) Rise time of HDQ line
(c) HDQ Host to fuel gauge communication
(d) Fuel gauge to Host communication
(e) Fuel gauge to Host response format
(f) HDQ Host to fuel gauge reset
Copyright © 2013, Texas Instruments Incorporated
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