1
Multimedia ICs
Clock generator for PD
BU2190F
The BU2190F is a clock generator IC for PD system drives, and uses a single crystal resonator to generate the three
clock signals needed for PD system drives.
Applications
PD system
Features
1) Clock signals of three different frequencies can be
generated with a single attached crystal resonator.
2) Internal PLL loop filter, eliminating the need for an
attached loop.
3) Single 5.0V power supply.
4) SOP 8-pin package.
Block diagram
XTALI
XTALO
16.9344MHz
XTAL
OSC
DATA 2
DATA 1
PLL 1
PLL 2
VREF
1 / 2
1 / 2
BCLK
CLK 1
CLK 2
59.2704MHz
40.2192MHz
16.9344MHz
OE
2
Multimedia ICs
BU2190F
Pin descriptions
Pin No.
1
Pin name
Function
Circuit
CLK2
Clock output 2 (f2 = 40.2192MHz)
Ground
Reference oscillation input
Reference oscillation output
Reference oscillation buffer output (fBCLK = 16.9344MHz)
Clock output 1 (f1 = 59.2704MHz)
V
DD
2
B
GND
3
--
XTALI
4
C
XTALO
5
C
BCLK
6
B
CLK1
7
B
V
DD
8
--
OE
A
Output enable
OE = H BCLK, CLK1, CLK2, enable
OE = L BCLK, CLK1, disable, CLK2, enable
Absolute maximum ratings (Ta = 25C)
Recommended operating conditions (Ta = 25C)
Parameter
Symbol
Limits
0.5 ~ + 7.0
0.5 ~ V
DD
+ 0.5
30 ~ + 125
450
Unit
V
V
C
mW
V
DD
V
IN
Tstg
P
D
Applied voltage
Input voltage
Storage temperature
Power dissipation
Does not represent guaranteed performance
Reduced by 4.5mW for increase in Ta of 1
C over 25
C.
Not designed for radiation resistance.
Parameter
Symbol
Limits
4.5 ~ 5.5
0.8
V
DD
~ V
DD
0.0 ~ 0.2
V
DD
5 ~ + 70
15 (Max.)
Unit
V
V
V
C
pF
V
DD
V
IH
V
IL
Topr
CL
Power supply voltage
Input high level voltage
Input low level voltage
Operating temperature
Output load
3
Multimedia ICs
BU2190F
Input / output circuits
Type A
Pin
To inside
Type B
Pin
From inside
Type C
Pin
Pin
To inside
Parameter
Symbol
Min.
125
1.0
--
0.7
V
DD
Typ.
0.0
--
--
Max.
1.0
0.3
V
DD
--
I
IL
I
IH
V
IL
V
IH
Input low level current
Input high level current
Input low level voltage
Input high level voltage
Unit
A
A
V
V
Conditions
V
IN
= 5V
V
IN
= 0V 5V / 65.5
A = 76K
--
--
0.5
V
OL
Output low level voltage
V
I
OL
= 4.0mA
0.7
V
DD
--
--
V
OH
I
DD
Output high level voltage
V
I
OH
= 4.0mA
--
16.91
16.91
100ppm
100ppm
16.80
30.00
20.00
40
--
--
--
--
--
30
16.9344
16.9344
59.2704
40.2192
16.9344
59.2704
40.2192
50
50
600
2
10
10
50
16.95
16.95
+ 100ppm
+ 100ppm
17.00
57.2
40.3
60
--
--
--
--
--
f
REF
fBCK
f
1
f
2
f
BLK1
f
1-1
f
2-1
DUTY
J1S
Jabs
Tpt
C
IN
C
OUT
Operating circuit current
Reference frequency (1)
Output frequency (1)
Output frequency (2)
Output frequency (3)
Output frequency (4)
Output frequency (5)
Output frequency (6)
mA
MHz
MHz
MHz
MHz
MHz
MHz
MHz
%
psec
psec
ms
pF
pF
fXTAL = 16.9344MHz, no load
f
REF
28 / 4 / 2
f
REF
19 / 4 / 2
V
DD
= 3.3V
V
DD
= 3.3V
V
DD
= 3.3V
Measure at 1 / 2V
DD
Reference value (1sigma)
Reference value (min.-to-max. width for jitter)
Reference value
Reference value (pin-to-pin capacitance + internal capacitance)
Reference value (pin-to-pin capacitance + internal capacitance)
Duty
Jitter
Jitter
Power up time
XTAL1 equivalent capacitance
XTAL0 equivalent capacitance
65.5
50.0
Electrical characteristics (unless otherwise noted, Ta = 25C, V
DD
= 5.0V)
4
Multimedia ICs
BU2190F
Application example
40.2192MHz
fref = 16.9344MHz
CLK2
GND
XTALI
XTALO
OE
V
DD
CLK1
BCLK
0.1
F
59.2704MHz
16.9344MHz
This IC should be used mounted to a PC board.
If used mounted by a socket, the proper characteristics may not be able to be obtained.
Attached components
(1) Crystal oscillator
A crystal resonator with an oscillation frequency of 16.9344MHz is usually sufficient. However, if f
O
precision is
necessary, adjust by attaching a capacity to each end of the crystal oscillator.
(2) Power supply
V
DD
bypass capacitor
SOP8
0.4
0.1
1.27
0.15
0.3Min.
0.15
0.1
0.11
6.2
0.3
4.4
0.2
5.0
0.2
8
5
4
1
1.5
0.1
External dimensions (Units: mm)
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