Fujitsu MB15C101 User manual

DS04-21215-3Ea

FUJITSU MICROELECTRONICS

DATA SHEET

1999.4

ASSP

IF Band

PLL Frequency Synthesizer

MB15C101

■DESCRIPTION

TheFujitsuMicroelectronicsMB15C101isanexclusiveIntermediateFrequency(IF)bandPhaseLockedLoop(PLL)

frequency synthesizer withpulse swallow operation. The reference divider and comparison divider have fixed divide

ratios, so that it is not required to set the divide ratios by a microcontroller externally.

It operates with a supply voltage of 3.0 V typ. and dissipates 1.0 mA typ.(270MHz) of current realized through the

use of Fujitsu Microelectronics’s CMOS technology.

The MB15C101 is ideally suitable for PHS systems.

■FEATURES

• Low power supply current: ICC = 1.0 mA typ. (VCC = 3 V, 270MHz)

• Pulse swallow function; Prescaler: 16/17

• Setting frequency (Selectable by Div input.)

– fosc = 19.2 MHz, fIF = 233.15 MHz (Div = “H”)

– fosc = 19.2 MHz, fIF = 259.20 MHz (Div = “L”)

• Lock detector

• Low power supply voltage: VCC = 2.4 V min.

• Wide operating temperature: Ta = –40 to +85°C

■PACKAGE

8-pin plastic SSOP

(FPT-8P-M03)

16-pad plastic BCC

(LCC-16P-M06)

MB15C101

■PIN ASSIGNMENT

■PIN DESCRIPTIONS

Pin No. Pin

name I/O Descriptions

SSOP-

8BCC-

–1,6,7,8,

9,14,

15,16 N.C – No connection

110V

CC – Power supply voltage input (2.4 V to 3.6 V).

211D

OO Charge pump output

312GND –Ground

4 13 fin I Prescaler input. Connection should be with AC coupling.

5 2 Div I Divide ratio switching input. Two kinds of divide ratios are

selectable by Div input “H” or “L”.

63fout O

Test purpose output. This pin is an open drain output so that

should be left open usually.

74LD O

Lock detector output.

LD = H ; Lock

LD = L ; Unlock

8 5 OSCin I Reference counter input. Connection should be with AC

coupling.

VCC

GND

fin

OSCIN

fout

DIV

(TOP VIEW)

(FPT-8P-M03)

(TOP VIEW)

(LCC-16P-M06)

N.C. N.C.

16 15

fin

GND

N.C.

VCC

N.C.

DIV

fout

N.C.

OSCin

N.C.

MB15C101

■BLOCK DIAGRAM

VCC

OSCIN

fin

GND

DIV fout

Oscillator

input

buffer

Reference divider

Reference

counter

(R)

Data

setting

circuit

Prescaler

16 / 17(P)Control circuit

Swallow

counter

(A)

Main

counter

(N)

Phase

comparator

charge

pump

Lock

detector

Output

selector

Comparison divider

MB15C101

■ABSOLUTE MAXIMUM RATINGS

WARNING: Semiconductor devices can be permanently damaged by application of stress (voltage, current,

temperature, etc.) in excess of absolute maximum ratings. Do not exceed these ratings.

■RECOMMENDED OPERATING CONDITIONS

Handling Precautions

• This device should be transported and stored in anti-static containers.

• This is a static-sensitive device; take proper anti-ESD precautions. Ensure that personnel and equipment are

properly grounded. Cover workbenches with grounded conductive mats.

• Always turn the power supply off before inserting or removing the device from its socket.

• Protect leads with a conductive sheet when handling or transporting PC boards with devices.

Parameter Symbol Rating Unit

Min. Max.

Power supply voltage VCC –0.5 +4.0 V

Input voltage VI–0.5 VCC +0.5 V

Output voltage VOUT –0.5 VCC +0.5 V

Output current IOUT 0+5mA

Storage temperature TSTG –55 +125 °C

Parameter Symbol Value Unit Note

Min. Typ. Max.

Power supply voltage VCC 2.4 3.0 3.6 V

Input voltage VIN GND – VCC V

Operating temperature Ta –40 – +85 °C

MB15C101

■ELECTRICAL CHARACTERISTICS

Recommended operating conditions unless otherwise noted.

Parameter Symbol Condition Value Unit

Min. Typ. Max.

Power supply current ICC PLL is locked.(270MHz)

VCC = 3.0 V, Ta = +25°C0.1 1.0 2.0 mA

Operating frequency fin fin AC coupling by 1000 pF

capacitor 50 – 270 MHz

OSCIN fosc AC coupling by 1000 pF

capacitor 3–26MHz

Input sensitivity fin Pfin AC coupling by 1000 pF

capacitor –10 – +2 dBm

OSCIN Vosc AC coupling by 1000 pF

capacitor 0.5 – – Vpp

Input voltage Div VIH –VCC ×

0.7 ––V

VIL –––

VCC ×

0.3 V

Input current Div IIH –––1.0µA

IIL ––1.0––µA

Input current OSCIN IOSC – –100 – 100 µA

Output voltage Do VOH VCC = 3.0 V, IOH=–0.3mA 2.6 – – V

VOL VCC = 3.0 V, IOL= 0.3mA – – 0.4 V

Output current Do IOH VCC = 3.0 V, VOH = 2V,

Ta = +25°C– –6.0 – mA

IOL VCC = 3.0 V, VOL = 1V,

Ta = +25°C–6.0–mA

High impedance cut off

current Do IOFF 0 ≤VDO ≤VCC ––3nA

MB15C101

■FUNCTIONAL DESCRIPTIONS

Two different frequencies can be selected by Div input “H” or “L”.

The divide ratios are calculated using the following equation:

fVCO = {(P ×N) + A} ×fOSC ÷ R (A < N)

■PHASE DETECTOR TIME CHART

Note: • .Phase error detection range: –2πto +2π

• Pulses on Do output signal during locked state are output to prevent dead zone.

• LD output becomes low when phase is tWU or more. LD output becomes high when phase error is tWL or

less and continues to be so for three cycles or more.

•.t

WU and tWL depend on OSCin input frequency.

tWU > 8/fosc (s) (e. g.tWU > 625.0ns, foscin = 12.8 MHz)

tWL < 16/fosc (s) (e. g. tWL < 1250.0ns, foscin = 12.8 MHz)

Symbol Description Div = “H” Div = “L”

fvco Output frequency of external VCO 233.15 MHz 259.20 MHz

fosc Reference oscillation frequency 19.2 MHz 19.2 MHz

N Divide ratio of the main counter 291 33

A Divide ratio of the swallow counter 7 12

PPreset divide ratio of dual modulus

prescaler 16/17 16/17

R Divide ratio of the reference counter 384 (fr = 50 kHz) 40 (fr = 480 kHz)

DOHigh impedance

tWLtWU

MB15C101

■MEASURMENT CIRCUIT (for measuring input sensitivity fin/OSCin)

SSOP-8

BCC-16

S.G

50 Ω

1000 pF

0.1 µF

1000 pF

VCC

2 KΩ

50 Ω

S.G

DIV : H or L

Oscilloscope

S.G

50 Ω

1000 pF

0.1 µF

VCC

1000 pF

VCC

2 KΩ

50 Ω

S.G

15 16

DIV : H or L

Oscilloscope

MB15C101

■TYPICAL CHARACTERISTICS

1. fin Input Sensitivity

2. OSCIN Input Sensitivity

1000 (MHz)

(dBm)

−5

−10

−15

−20

−25

−30

−35

−40

−45

−50 0 100 200 300 400 500 600 700 800 900

;;

SPEC

VCC =2.4 V

VCC =3.0 V

VCC =3.6 V

Ta =+25 °C

fin (MHz)

Pfin (dBm)

100 (MHz)

Ta =+25 °C

(dBm)

−5

−10

−15

−20

−25

−30

−35

−40

−45

−50 0 102030405060708090

;;;

SPEC VCC =2.4 V

VCC =3.0 V

VCC =3.6 V

fosc (MHz)

Vosc (dBm)

MB15C101

3. fin Input Impedance

4. OSCIN Input Impedance

START .500 000 MHz

1 : 58.875 Ω

−850.16 kΩ

50 MHz

2 : 16.891 Ω

−416.2 Ω

100 MHz

3 : 12.047 Ω

−202.87 Ω

200 MHz

4 : 11.867 Ω−131.54 Ω4.0331 pF

STOP 1 000.000 000 MHz

300.000 000 MHz

5.1345 Ω

−10.288 kΩ

3 MHz

529.87 Ω

−3.6659 kΩ

10 MHz

114.44 Ω

−1.8514 kΩ

20 MHz

1 :

2 :

3 :

START .500 000 MHz STOP 100.000 000 MHz

26.000 000 MHz

4 : 068.25 Ω−1.4236 Ω4.3 pF

MB15C101

5. Do Outut Current

3.0

2.5

2.0

1.5

1.0

0.5

0.0 0−2−4−6−8−10 −12

VOH (V)

IOH (mA)

VCC =3.0 V, Ta =+ 25 °C

VCC =3.0 V, Ta =+25 °C

3.0

2.5

2.0

1.5

1.0

0.5

0.0 024681012

VOL (V)

IOL (mA)

S.G. GND

VCC

50 Ω1000 pF

fin Do

OSCin Parameter Analyzer

IOH

S.G. GND

VCC

50 Ω1000 pF fin Do

OSCin Parameter Analyzer

IOL

VOH – IOH

VOL – IOL

Measurement Circuit

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