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TPS65921 Datasheet(PDF) 6 Page - Texas Instruments

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Part # TPS65921
Description  Power Management and USB Single Chip
PDF  58 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS65921 Datasheet(HTML) 6 Page - Texas Instruments

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32KCLKOUT
CK0
CK1
CK1
SWCS048-001
TPS65921
SWCS048F – MARCH 2010 – REVISED MARCH 2012
www.ti.com
The following table details the output clock timing characteristics. The following figure shows the 32KCLKOUT
output clock waveform.
NAME
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNIT
CK0
1/tC(32KCLKOUT)
Frequency
32.768
kHz
CK1
Pulse duration,
0.40 ×
0.60 ×
tW(32KCLKOUT)
ns
32KCLKOUT low or high
tC(32KCLKOUT)
tC(32KCLKOUT)
CK2
tR(32KCLKOUT)
Rise time, 32KCLKOUT (1)
16
ns
CK3
tF(32KCLKOUT)
Fall time, 32KCLKOUT (1)
16
ns
At 1-kHz offset from the
SSB Phase Noise
–110
dBc/Hz
carrier
(1)
The output capacitive load is equivalent to 30 pF.
Figure 1. 32KCLKOUT Output Clock
HFCLKOUT OUTPUT CLOCK
The following table summarizes the HFCLKOUT output clock electrical characteristics.
Table 2. HFCLKOUT Output Clock Electrical Characteristics
NAME
PARAMETER DESCRIPTION
MIN
TYP
MAX
UNIT
f
Frequency
19.2, 26, or 38.4
MHz
CL
Load capacitance
30
pF
VOUT
Output clock voltage, depending on
1.8(1)
V
output reference level IO.1P8
VOH
Voltage output high
VOUT – 0.45
VOUT
V
VOL
Voltage output low
0
0.45
V
(1)
The output voltage depends on output reference level which is IO.1P8.
The following table details the HFCLKOUT output clock timing characteristics.
Table 3. HFCLKOUT Output Clock Switching Characteristics
NAME
PARAMETER
DESCRIPTION
MIN
TYP
MAX
UNIT
CHO1
1/tC(HFCLKOUT)
Frequency
19.2, 26, or 38.4
MHz
Pulse duration, HFCLKOUT low
0.4 ×
0.6 ×
CHO2
tW(HFCLKOUT)
ns
or high
tC(HFCLKOUT)
tC(HFCLKOUT)
Rise time, HFCLKOUT, low
drive(1)
- Load: 5 pF
3.8
- Load: 10 pF
5.5
CHO3
tR(HFCLKOUT)
ns
Rise time, HFCLKOUT, high
drive(1)
- Load: 10 pF
2.9
- Load: 20 pF
5.0
(1)
Low drive: MISC_CFG[CLK_HF_DRV] = 0 (default)
High drive: MISC_CFG[CLK_HF_DRV] = 1
6
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Copyright © 2010–2012, Texas Instruments Incorporated
Product Folder Link(s): TPS65921



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