S1M8821 Samsung Semiconductor, Inc., S1M8821 Datasheet - Page 7

• Manufacturer Part Number: S1M8821
• Description: Interger Rf/if Dual Pll Frequency Synthesizer
• Manufacturer: Samsung Semiconductor, Inc.

INTERGER RF/IF DUAL PLL
PIN DESCRIPTION (Continued)
(20TSSOP)
Pin No
15
16
17
18
19
20
-
(24QFN)
Pin No
17
18
19
20
21
22
23
Symbol
CPoIF
GND
V
finIF
finIF
Vp2
DD
-
2
I / O
N/C
O
I
I
-
-
-
The complementary input of the IF prescaler. A bypass
capacitor must be placed as close as possible to this pin and
be connected directly to the ground plane. The bypass
capacitor is optional with some loss of sensitivity.
IF prescaler input. The signal comes from the external VCO.
Ground for IF digital blocks.
Internal IF charge pump output for connection to an external
loop filter whose filtered output drives an external VCO.
No connection.
Power supply voltage input for IF charge pump(
Power supply voltage input for the IF PLL part. V
equal V
must be placed as close as possible to this pin and be
connected directly to the ground plane.
DD
2. In order to reject supply noise, bypass capacitors
Description
DD
S1M8821/22/23
V
1 must
DD
2)
7