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DATA SHEET
BiCMOS INTEGRATED CIRCUIT
µ
PD3140GS
1.8 to 5.5 V BIAS, 80 MHz to 550 MHz DUAL PLL FREQUENCY SYNTHESIZER
LSI FOR CORDLESS TELEPHONES AND PORTABLE CELLULAR RADIO
DESCRIPTION
µ
PD3140GS is a dual PLL frequency synthesizer LSI designed for cordless telephones and portable cellular radio. This
LSI is manufactured using 13 GHz f
T
BiCMOS process and integrated 2 pairs of prescaler + PLL operate from 80 MHz to
550 MHz. This LSI realizes low power consumption: on 1.8 V, 4.3 mA at dual operation and 2.7 mA at single operation. The
additional functions are high-speed lockup and lock phase sensitivity setting. The package is a 20-pin SSOP (300 mil) suitable
for high-density surface mounting. Thus, this product contributes to produce physically-small, low power-consumption, long-
life battery systems.
FEATURES
• Supply voltage: V
CC1
= V
CC2
= 1.8 to 5.5 V
• Input operating frequency: f
in
= 80 MHz to 550 MHz (PLL 1ch, 2ch in common)
• Reference oscillating frequency f
ref
= 30 MHz
MAX.
. Built-in high-speed reference oscillator signal can be taken out from the
buffer amplifier output pin.
• Built-in power-save function: control 2 prescaler’s ON/OFF operation individually.
• Low power consumption: Dual operation (both ch ON): I
CC
OP2 = 4.3 mA
TYP.
@ V
CC
= 1.8 V
@ V
CC
= 1.8 V
@ V
CC
= 1.8 V
Single operation (either ch ON): I
CC
OP1 = 2.7 mA
Power save mode (both ch OFF): I
CC
PS = 10
µ
A
lockup time mode).
TYP.
MAX.
• Decreased lockup time available: charge pump switch control (lockup time: 9 ms @ f
step
= 12.5 kHz, 1 MHz swing, decreased
• Lock phase sensitivity programmable: Phase difference allowance for lock up can be controlled as 4 stages (150 ns to 5
µ
s).
• Pins and counter data are compatible to
µ
PD2844BGS (except option data).
• High-density surface mounting: 20-pin plastic SSOP.
ORDERING INFORMATION
PARTS NUMBER
PACKAGE
SUPPLYING FORM
Embossed tape 16 mm wide. QTY 2.5 k/reel
Pin1 is in tape pull-out direction.
Embossed tape 16 mm wide. QTY 2.5 k/reel
Pin1 is in tape roll-in direction.
Adhesive tape 32 mm wide. QTY 2 k/reel
Pin1 is in tape pull-out direction.
Adhesive tape 32 mm wide. QTY 2 k/reel
Pin1 is in tape roll-in direction.
µ
PD3140GS-E1
µ
PD3140GS-E2
µ
PD3140GS-T1
µ
PD3140GS-T2
20 pin plastic SSOP
(300 mil)
*
To order evaluation sample, please contact your local NEC sales office (Order number :
µ
PD3140GS).
Caution: Electro-static sensitive device
Document No. P10957EJ2V0DS00 (2nd edition)
(Previous No. ID-3471)
Date Published April 1996 P
Printed in Japan
©
1996
µ
PD3140GS
PIN EXPLANATIONS
PIN No.
1
2
19
3
4
5
6
7
SYMBOL
V
CC
IN
1
IN
2
EN
CLK
DATA
TEST
LOK
EXPLANATIONS
Supply voltage for analog block and 2 prescalers
Input for 64/65 modulus prescaler. This pin must be coupled with a capacitor (e.g. 1 000 pF).
IN
1
: prescaler input for PLL1ch
IN
2
: prescaler input for PLL2ch
Load enable data input pin
Clock data input pin
Data input pin
Test pin (Refer to page 8). Used as PLL, this pin should be grounded.
Lock detecter output pin. This pin is designed as open drain.
Relation between operation mode and conditions to output is as follows.
OPERATE MODE
SINGLE OPERATION
DUAL OPERATION
CONDITION TO OUTPUT LOCK
1 PLL LOCKED
2 PLL LOCKED
LOCK OUTPUT
LOW (SINK)
(In other case, LOK pin output high as unlock.)
8
13
9
12
CP
1
CP
2
FI
1
FI
2
Charge pump output pin.
CP
1
: Charge pump output from PLL1ch
CP
2
: Charge pump output from PLL2ch
Gate input pin of active filter’s FET
Also function as charge pump switch output pin.
FI
1
: for PLL1ch
FI
2
: for PLL2ch
Drain output of active filter’s FET
FO
1
: for PLL1ch
FO
2
: for PLL2ch
In the case of passive filter, these pins should be opened.
Ground pin of PLL digital block (PLL 1ch, 2ch in common)
Reference oscillator for both PLL
XO : output
XI : input
These pins should be externally equipped with crystal.
In the case of TCXO, input to XI pin through coupling
capacitor (e.g. 1 000 pF).
V
IN
= 0.2 V
p-p
to 1.0 V
p-p
, f
max
= 30.0 MHz
MAX.
Buffer output pin from reference oscillator
From
REF.
OSC.
Example for active filter
FO
CP
FI
In
from CPSW IC
VCO
10
11
14
15
16
FO
1
FO
2
GND
2
XO
XI
Oscillation amplifier
XI
XO
In IC
Buffer
amplifier
Crystal
17
XB
to 2nd MIX
XB
In IC
18
20
V
CC2
GND
1
Supply voltage for PLL digital block (PLL 1ch, PLL 2ch in common)
Ground pin of analog block and 2 prescalers
3
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