MB1511 Fujitsu, MB1511 Datasheet - Page 3

• Manufacturer Part Number: MB1511
• Description: Serial Input PLL Frequency Synthesizer
• Manufacturer: Fujitsu

Pin No.
12, 19
PIN DESCRIPTION
2, 9
10
11
13
14
15
16
17
18
20
1
3
4
5
6
7
8
Pin Name
OSC
OSC
BISW
Clock
GND
Data
V
f
NC
LD
FC
D
LE
V
f
OUT
IN
CC
P
R
P
O
OUT
IN
I/O
—
—
—
—
O
O
O
O
O
O
O
I
I
I
I
I
I
Oscillator input.
Oscillator output.
A crystal is placed between OSC
Power supply input for charge pump and analog switch.
Power supply voltage input.
Charge pump output.
The characteristics of charge pump is reversed depending upon FC input.
Ground.
Phase comparator output.
Normally this pin outputs high level. While the phase difference of f
exists, this pin outputs low level.
Prescaler input.
The connection with an external VCO should be AC connection.
Clock input for 19-bit shift register and 16-bit shift register.
On rising edge of the clock shifts one bit of data into the shift registers.
Binary serial data input.
The last bit of the data is a control bit which specified destination of shift reg-
isters.
When this bit is high level and LE is high level, the data stored in shift regis-
ter is transferred to 15-bit latch. When this bit is low level and LE is high
level, the data is transferred to 18-bit latch.
Load enable input (with internal pull up resistor).
When LE is high or open, the data stored in shift register is transferred into
latch depending upon the control bit. At the time, internal charge pump out-
put is connected to BISW pin because internal analog switch becomes ON
state.
Phase select input of phase comparator (with internal pull up resistor).
When FC is low level, the characteristics of charge pump, phase comparator
is reversed.
FC input signal controls f
Analog switch output.
Usually BISW pin is set high-impedance state. When internal analog switch
is ON (LE pin is high level), this pin outputs internal charge pump output.
Minitor pin of phase comparator input.
f
mable divider output (f
FC = H: It is the same as f
FC = L: It is the same as f
Output for external charge pump.
The characteristics are reversed according to FC input.
No connection.
out
P pin is N-channel open drain output.
pin outputs either programmable reference divider output (f
p
) depending upon FC pin input level.
out
p
r
output level.
output level.
pin (test pin) output level, fr or fp.
Functions
IN
and OSC
OUT
.
MB1511
r
) or program-
r
and f
p
3