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SM8707E Datenblatt(PDF) 9 Page - Nippon Precision Circuits Inc

Teilenummer SM8707E
Bauteilbeschribung  Clock Generator with Dual PLLs
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Hersteller  NPC [Nippon Precision Circuits Inc]
Direct Link  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM8707E Datenblatt(HTML) 9 Page - Nippon Precision Circuits Inc

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SM8707E/F
SEIKO NPC CORPORATION - 9
Sampling Frequency and Output Clock Frequency
SM8707E
The SM8707E sampling frequency fs can be switched between 44.1kHz when FSEL(Pin 14) is LOW, and 48kHz
when FSEL is HIGH. The audio outputs(AO1 and AO2) are equivalent to 512fs, where fs is determined by the setting
on FSEL. In addition, the signal processor outputs(SO1 and SO2) are 33.8688MHz clocks derived from the master
clock. And the video outputs(MO1 and MO2) are 27MHz clocks, identical to the master clock.
The SM8707E supported clock frequencies are shown in Table 1.
Output clock frequency [MHz]
FSEL
(Pin 14)
Sampling
frequency fs
[kHz]
AO1
(Pin 9)
AO2
(Pin 10)
SO1
(Pin 13)
SO2
(Pin15)
MO1
(Pin 3)
MO2
(Pin 4)
HIGH
48
24.5760
(512fs)
24.5760
(512fs)
33.8688
33.8688
27.0000
27.0000
LOW
44.1
22.5792
(512fs)
22.5792
(512fs)
33.8688
33.8688
27.0000
27.0000
Table 1. Sampling frequency and output clock frequency (27.0000MHz master clock frequency)
SM8707F
The SM8707F sampling frequency fs can be switched between 44.1kHz when FSEL(Pin 14) is HIGH, and 48kHz
when FSEL is LOW. The audio outputs(AO1 and AO2) are equivalent to 768fs, where fs is determined by the setting
on FSEL. In addition, the signal processor outputs(SO1 and SO2) are 16.9344MHz and 33.8688MHz clocks,
respectively, derived from the master clock. The video output (MO1) is a 27MHz clock, identical to the master clock.
The SM8707F supported clock frequencies are shown in Table 2.
Output clock frequency [MHz]
FSEL
(Pin 14)
Sampling
frequency fs
[kHz]
AO1
(Pin 9)
AO2
(Pin 10)
SO1
(Pin 13)
SO2
(Pin15)
MO1
(Pin 3)
HIGH
44.1
33.8688
(768fs)
33.8688
(768fs)
16.9344
33.8688
27.0000
LOW
48
36.8640
(768fs)
36.8640
(768fs)
16.9344
33.8688
27.0000
Table 2. Sampling frequency and output clock frequency (27.0000MHz master clock frequency)


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