MB1508 Fujitsu Microelectronics, Inc., MB1508 Datasheet - Page 3

• Manufacturer Part Number: MB1508
• Description: Serial Input PLL Frequency Synthesizer on Chip 2.5 GHZ Prescaler
• Manufacturer: Fujitsu Microelectronics, Inc.

PIN DESCRIPTION
Pin
No.
15
16
17
18
19
20
10
11
12
13
14
1
2
3
4
5
6
7
8
9
OSC
Name
OSC
GND1
GND2
Clock
V
V
Data
f
D
D
BC4
BC3
BC2
BC1
Pin
OUT
FC
LE
LD
fin
CC1
f
CC2
O1
O2
in
OUT
IN
I/O
—
—
—
—
O
O
O
O
O
O
O
O
I
I
I
I
I
I
I
Phase select input pin of the phase detector. This pin involves an internal pull up resistor.
When this pin is low, characteristics of the charge pump and phase detector can be reversed.
This input also selects f
Load enable input pin. This pin involves a schmitt trigger circuit.
When this pin is high, the data stored in the shift register is transferred into the latch.
Serial data of binary code input pin. This pin involves a schmitt trigger circuit.
Clock input for 24-bit shift register. This pin involves a schmitt trigger circuit.
On rising edge of the clock shifts one bit of data into the shift registers.
PLL power supply voltage input pin.
Oscillator input pin.
Oscillator output pin.
A crystal is connected between OSC
PLL ground pin.
Charge pump output pins.
Phase characteristics can be reversed depending upon FC pin input level.
Band switching output pins. (Open-collector output)
Output is controlled by a band bit data, individually.
BCX—bit = H : BCX output transistor is ON.
BCX—bit = L : BCX output transistor is OFF.
Complementary input pin of f
Prescaler ground pin.
Prescaler input pin.
This signal is AC coupled.
Prescaler power supply voltage input pin.
Monitor pin of the phase detector input.
f
output frequency f
Phase detector output pin.
Normally this pin outputs high. While the phase difference between f
outputs low.
OUT
pin outputs either of the programmable reference divider output frequency f
FC Pin
H
L
(X = 1 to 4)
p
depending upon the FC pin input level.
OUT
pin output level, either f
in
. Please connect to GND through a capacitor.
f
out
output signal
IN
pin and OSC
f
f
p
r
Description
r
OUT
or f
p
pin.
. Please see page 6.
r
and f
p
exists, this pin
r
or programmable divider
MB1508
3