External Charge Mode
(a)
Min
Typ
Max
Unit
Fast charge current, I
fast
200
-
500
mA
Control current into CHG_EXT
0
-
20
mA
Voltage on CHG_EXT
0
-
5.75
V
External pass device h
fe
-
50
-
-
Sense voltage, between VBAT_SENSE and VBAT at maximum
current
195
200
205
mV
(a)
In the external mode, the battery charger meets all the previous charger electrical characteristics and the additional or superseded electrical
characteristics are listed in this table.
13.3.5 USB
Min
Typ
Max
Unit
3V3_USB for correct USB operation
3.0
3.3
3.6
V
Input Threshold
V
IL
input logic level low
-
-
0.3 x
3V3_USB
V
V
IH
input logic level high
0.7 x
3V3_USB
-
-
V
Output Voltage Levels to Correctly Terminated USB Cable
V
OL
output logic level low
0
-
0.2
V
V
OH
output logic level high
2.8
-
3V3_USB
V
13.3.6 Clocks
Crystal Oscillator
Min
Typ
Max
Unit
Frequency
16
26
32
MHz
Crystal load capacitance
-
9
-
pF
Frequency stability
-
-
20
ppm
Frequency tolerance
-
-
±20
ppm
Pullability
10
15
30
ppm/pF
Transconductance
2
-
-
mS
Advance Information
This material is subject to CSR's non-disclosure agreement
© Cambridge Silicon Radio Limited 2011
Page 81 of 110
CS-209182-DSP1
CSR8640 BGA
Data Sheet
