GEC Plessey Semiconductors NJ88C30KAMP, NJ88C30KADP Datasheet

THIS DOCUMENT IS FOR MAINTENANCE

PURPOSES ONLY AND IS NOT

RECOMMENDED FOR NEW DESIGNS

NJ88C30 IS FOR MAINTENANCE PURPOSES ONLY AND IS NOT RECOMMENDED FOR NEW DESIGNS

NJ88C30

VHF SYNTHESISER

T

he NJ88C30 contains all the logic needed for a VHF PLL
synthesiser and is fabricated on the GPS high performance, small
geometry CMOS process. The circuit contains a reference oscillator
and divider, a two-modulus prescaler and 4-bit control register, a
12-bit programmable divider, a phase comparator and the
necessary data input and control logic.

FEATURES

■

Low Power CMOS

■ Easy to Use

■

Low Cost

■

Single Chip Synthesiser to VHF

■

Lock Detect Output

APPLICATIONS

■

Mobile Radios

■ Hand Held Portable Radios

■

Sonobuoys

ORDERING INFORMATION

NJ88C30 KA DP Plastic DIL Package
NJ88C30 KA MP Miniature Plastic DIL Package

GROUND

DATA TRANSFER

CLOCK

DATA

CRYSTAL MON

CRYSTAL IN

CRYSTAL OUT

1

2

3

4

NJ88C30

5

6

7

14

13

12

11

10

9
8

Fig.1 Pin connections - top view

ABSOLUTE MAXIMUM RATINGS

Supply voltage, V
Voltage on any pin
Operating temperature
Storage temperature

DD

NJ88C30

DS3281-1.1

COMP FREQ

f UP

f DN

LD

VCO

P DIV OUT

V

DD

DP14, MP14

20·3V to 6V

20·3V to V

230°C to 170°C

255°C to 1125°C

DD

10·3V

CRYSTAL

OUT

CRYSTAL

IN

VCO

DATA

TRANSFER

DATA

CLOCK

V

CRYSTAL MON

7

6

10

2
4
3

4 100

4 15/16

4-BIT COUNTER

4-BIT REGISTER

12-BIT PROG DIVIDER

19-BIT SHIFT REGISTER

5

0V

12-BIT REGISTER

REFERENCE DIVIDER

4 1, 5, 10, 20, 2, 4, 8 OR 16

REF

SELECT

(DR2-DR0)

3-BIT

REGISTER

DD

8

PHASE

1

GROUND

COMP

14

COMP FREQ

0V

V

DD

13

f UP

12

f DN

0V

11

LOCK DETECT
(LD)

0V

9

P DIV OUT

0V

Fig.2 Block diagram

NJ88C30

ELECTRICAL CHARACTERISTICS

Test conditions (unless otherwise stated):

T

= –30°C to +70°C, VDD = 5V ±0·5V

AMB

Characteristic

Pin

Min.

Value

Typ. Max.

Units

Conditions

Supply current

Crystal Oscillator

Frequency

External input level
High level
Low level

VCO Input

Input sensitivity
Slew rate
Input impedance

DATA, DATA TRANSFER and
CLOCK Inputs

High level
Low level
Rise, fall time
Data set-up time
Clock frequency
Transfer pulse width

CRYSTAL MONITOR Output

Current sink

COMP FREQ,

LD, P DIV

Current sink

f UP / f DN

Current sink
Current source

8

6, 7

6
6
6

10
10
10

2, 3, 4

2. 3, 4
2, 3
3, 4

3
2

5

9, 11, 14

12
13

V

V

1

DD

1
4

DD

200

500

0·8

1·6

0·8
0·8

21

21

4

10

5pF//

10k

7

15

1

1

200

2

mA

MHz

Vrms

V
V

Vrms

V/µs

V

V
ns
ns

MHz

ns

mA

mA

mA
mA

1VRMS VCO input at 200MHz

XTAL

= 10MHz

and f

Parallel resonant,
fundamental crystal
AC coupled
DC coupled
DC coupled

At 200MHz, see Fig. 3

See Fig. 4

= 0·5V

V

OUT

V

= 0·5V

OUT

V

= 0·5V

OUT

= VDD20·5V

V

OUT

1·6

1·4

1·2

1·0

0·8

0·6

VCO INPUT AMPLITUDE (V RMS)

0·4

0·2

0

0 50 100 150 200

GUARANTEED OPERATING AREA *

* Tested as

specified in
Table of
Electrical
Characteristics

TYPICAL

FREQUENCY (MHz)

Fig. 3 Input sensitivity

2