12338\CYW2338
PRELIMINARY
CYW2338
Dual Serial Input PLL with 2.5- and 1.1-GHz Prescalers
Features
Applications
• Operating voltage 2.7V to 5.5V
• Operating frequency to 2.5 GHz on PLL1 and 1.1 GHz
on PLL2 with prescaler ratios of 64/65 and 128/129
The Cypress CYW2338 is a dual serial input PLL frequency
synthesizer designed for high performance dual conversion
TV, VCR, and Set-top tuner sections, as well as downstream
receivers for cable modems. The CYW2338 is also well suited
for high-volume, low-cost wireless communications applica-
tions. One 2.5-GHz and 1.1-GHz prescaler, each with pulse
swallow capability are included. The device operates from
2.7V and dissipates only 27 mW.
• Lock detect feature
µA typical at 3.0V
• Power-down mode ICC < 1
• Serial data input accepts data clock rates as low as
1 kHz
• Low power/voltage operation with low current standby
mode
• On-chip reference oscillator
• Available in a 20-pin TSSOP (Thin Shrink Small Outline
Package)
• Available in a 24-pin CSP (Chip Scale Package)
• Available in a 20-pin MLF
(Mirco Lead Frame Package)
Dual PLL Block Diagram
GND (4)
GND (7)
VCC1 (1)
VCC2 (20)
VP1 (2)
FIN1 (5)
Prescaler
64/65 or
128/129
fp1
Binary 7-Bit
Swallow Counter
Binary 11-Bit
Programmable Counter
DOPLL1 (3)
Phase
Detector
Charge
Pump
FIN1# (6)
19-Bit
Latch
Pwr-dwn
PLL1
OSC_IN (8)
fr fp
fr1
fr2
15-Bit
Monitor
Output
Selector
Reference Counter
OSC_OUT (9)
FO/LD (10)
20-Bit Latch
Latch
Selector
LE (13)
DATA (12)
20-Bit Latch
Power
Control
15-Bit
Reference Counter
22-Bit
Shift
Cntrl
Reg.
CLOCK (11)
19-Bit
Latch
Pwr-dwn
PLL2
Phase
Detector
Charge
Pump
F
IN2 (16)
Prescaler
64/65 or
128/129
Binary 4-Bit
Swallow Counter
Binary 11-Bit
Programmable Counter
DOPLL2 (18)
fp2
FIN2# (15)
GND (14)
GND (17)
VP2 (19)
Pin Configuration
V
1
1
2
20
19
18
17
16
15
14
13
12
11
V
2
CC
21
20
1
CC
NC
NC
V 1
V 2
P
2
3
4
5
6
7
8
9
DoPLL2
Vp1
DoPLL1
GND
P
19
18
17
16
15
14
13
GND
Fin2
Fin2#
GND
LE
D PLL1
3
D PLL2
O
O
1
2
3
4
5
15
14
DoPLL1
GND
GND
Fin2
Fin2#
GND
LE
GND
4
GND
(Top View)
Fin1
F
1
5
F
F
2
IN
IN
IN
(Top View)
13
12
11
Fin1
Fin1#
GND
F
1#
6
2#
Fin1#
GND
IN
GND
OSC_IN
7
GND
LE
DATA
NC
OSC_IN
NC
8
OSC_OUT
9
DATA
CLOCK
F /LD
10
O
CSP
MLF
TSSOP
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
•
CA 95134
•
408-943-2600
February 6, 2001, rev. **