ROHM BU2190F Datasheet
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.1Pin 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
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Absolute maximum ratings (Ta = 25°C)
•
Recommended operating conditions (Ta = 25°C)
Parameter Symbol Limits
– 0.5 ~ + 7.0
– 0.5 ~ VDD + 0.5
– 30 ~ + 125
450
Unit
V
V
°C
mW
V
DD
VIN
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.
䊊 Not designed for radiation resistance.
Parameter Symbol Limits
4.5 ~ 5.5
0.8 × V
DD ~ VDD
0.0 ~ 0.2 × VDD
– 5 ~ + 70
15 (Max.)
Unit
V
V
V
°C
pF
V
DD
VIH
VIL
Topr
CL
Power supply voltage
Input high level voltage
Input low level voltage
Operating temperature
Output load
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