SM8707E/F
Clock Generator with Dual PLLs
OVERVIEW
The 8707E/F are dual-PLL clock generator ICs, using a 27MHz master clock, that generate independent audio clock,
video clock, and signal processor clock outputs needed in DVD player/recorder applications. Each PLL loop filter and
crystal oscillator circuit are built-in and require no external components, resulting in high-precision clocks. The lineup
includes devices that support both 44.1/48kHz audio sampling frequencies (fs), switchable using a control pin. The
sampling frequency can be switched during operation without generating any output spike noise.
FEATURES
■
Supply voltage: 3.0 to 3.6V
■
Low current consumption: 35mA typ.
(V
DD
=3.3V, all outputs with no load)
■
27MHz master clock
(internal PLL reference clock)
■
Generated clocks
SM8707E
Video system output
Audio system output
Signal processor
system output
27.0000MHz
512fs
33.8688MHz
SM8707F
27.0000MHz
768fs
16.9344MHz
33.8688MHz
■
PLL loop filter built-in
■
Crystal oscillator circuit built-in
■
Sampling frequency fs: 44.1/48kHz
■
16-pin VSOP package (Pb free)
■
Low jitter output (1-sigma output load capacitance typical values)
SM8707E
Video system output
Audio and Signal
processor
system output
55ps
40ps
20ps
SM8707F
20ps
APPLICATIONS
■
DVD players/recorders
■
DVD car navigation system
PACKAGE DIMENSIONS
(Unit : mm)
Weight: 0.07g
ORDERING INFOMATION
Device
SM8707EV
SM8707FV
Package
16pin VSOP
SEIKO NPC CORPORATION - 1
SM8707E/F
PINOUT
(Top view)
VDD1
VSS1
MO1
MO2(E ver.)
NC(F ver.)
VDD2
VSS2
XTI
XTO
1
16
NC
SO2
FSEL
SO1
VDD3
VSS3
AO2
8
9
AO1
PIN DESCRIPTION
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
VDD1
VSS1
MO1
MO2(E ver.)
NC(F ver.)
VDD2
VSS2
XTI
XTO
AO1
AO2
VSS3
VDD3
SO1
FSEL
SO2
NC
I/O
-
-
O
O
-
-
-
I
O
O
O
-
-
O
I
O
-
Supply for digital block
Ground for digital block
Video system output
Video system output
Non connection output (leave pin open circuit)
Supply for analog block
Ground for analog block
Crystal oscillator connection or external clock input
Crystal oscillator connection
Audio system output
Audio system output
Ground for digital block
Supply for digital block
Signal processor system output
Sampling frequency select
Signal processor system output
Non connection (leave pin open circuit or connect to VDD)
Description
SEIKO NPC CORPORATION - 2
SM8707E/F
BLOCK DIAGRAM
FSEL
XTI
XTO
Reference
Divider 0
X′tal
OSC
Phase
Detector 0
Charge
Pump 0
AO1
LPF 0
VCO 0
AO2
Loop
Divider 0
Control
Logic
Reference
Divider 1
Phase
Detector 1
Charge
Pump 1
LPF 1
VCO 1
SO1
SO2
MO1
Loop
Divider 1
MO2(E ver.)
NC (F ver.)
SEIKO NPC CORPORATION - 3
SM8707E/F
Note: Unless otherwise noted, VDD applies to VDD1, VDD2, and VDD3. Similarly, VSS applies to VSS1, VSS2, and
VSS3.
SPECIFICATIONS
Absolute Maximum Ratings
Parameter
Supply voltage range
Supply voltage deviation
Input voltage range
Output voltage range
Power dissipation
Storage temperature range
Symbol
V
DD1
, V
DD2
, V
DD3
V
DD1
-V
DD2
, V
DD1
-V
DD3
,
V
DD2
-V
DD3
V
IN
V
OUT
P
D
T
STG
Rating
-0.3 to +6.5
± 0.1
-0.3 to V
DD
+0.3
-0.3 to V
DD
+0.3
165
-55 to +125
Unit
V
V
V
V
mW
C
Recommended Operating Conditions
V
SS
=V
SS1
=V
SS2
=V
SS3
=0V unless otherwise noted.
SM8707E
Parameter
Supply voltage ranges
Output load capacitance 1
Output load capacitance 2
Output load capacitance 3
Master clock frequency
Operating temperature range
Symbol
V
DD1
,V
DD2
,V
DD3
C
L1
C
L2
C
L3
f
XTAL
T
OPR
Condition
MIN
（Note
1,2,3）
MO1 output
MO2 output
SO1,SO2,AO1,AO2 outputs
When using crystal oscillator
+3.0
-
-
-
-
-10
Rating
TYP
-
-
-
-
27.0000
-
MAX
+3.6
40
25
15
-
+75
V
pF
pF
pF
MHz
℃
Unit
SM8707F
Parameter
Supply voltage ranges
Output load capacitance 1
Output load capacitance 2
Master clock frequency
Operating temperature range
Symbol
V
DD1
,V
DD2
,V
DD3
C
L1
C
L2
f
XTAL
T
OPR
Condition
MIN
（Note
1,2,3）
MO1,SO1,SO2 outputs
AO1,AO2 outputs
When using crystal oscillator
+3.0
-
-
-
-40
Rating
TYP
-
-
-
27.0000
-
MAX
+3.6
25
15
-
+85
V
pF
pF
MHz
℃
Unit
Note 1. The supply voltage is defined relative to V
SS
=0V.
Note 2. The supply voltages applied on VDD1, VDD2 and VDD3 should be derived from a common supply source.
Note 3. If the supply voltages on VDD1, VDD2 and VDD3 are from different sources, they should be applied simultaneously. The
SM8707 may be damaged if the supply voltage timing is different.
SEIKO NPC CORPORATION - 4
SM8707E/F
DC Electrical Characteristics
■
SM8707E
f
XTAL
=27.0000MHz, V
DD
=3.3V ± 0.3V, V
SS
=0V, T
a
=-10 to +75C unless otherwise noted.
■
SM8707F
f
XTAL
=27.0000MHz, V
DD
=3.3V ± 0.3V, V
SS
=0V, T
a
=-40 to +85C unless otherwise noted.
Parameter
Symbol
Pins
Condition
MIN
Current
consumption
V
DD
=3.3V,T
a
=25℃,fs=48kHz,
I
DD
V
IH
V
IL
I
IH1
Input current
I
IL1
I
IH2
I
IL2
Output voltage
V
OH
V
OL
VDD
Crystal oscillator connected,
no load on all outputs
FSEL,XTI
FSEL
*1
V
DD
=3.3V
V
IN
=V
DD
V
IN
=0V
V
IN
=V
DD
V
IN
=0V
I
OH
=-2mA
I
OL
=2mA
0.8V
DD
-
-
-100
-
-40
V
DD
-0.4
-
-
-
-
-
-
-
-
-
-
0.2V
DD
1
-
40
-
-
0.4
V
A
V
-
35
45
mA
Rating
TYP
MAX
Unit
Input voltage
XTI
All outputs
excluding XTO
*1. FSEL pin has Schmitt-trigger input and built-in pull-up resistor.
SEIKO NPC CORPORATION - 5
编程基础
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
