NEC UPB1508GV-E1, UPB1508GV Datasheet

DATA SHEET

BIPOLAR DIGITAL INTEGRATED CIRCUIT

µµµµ

PB1508GV

3 GHz INPUT DIVIDE BY 2 PRESCALER IC

FOR DBS TUNERS

PB1508GV is a 3.0 GHz input divide by 2 prescaler IC for DBS tuner applications. µPB1508GV can make

µ

VHF/UHF band PLL frequency synthesizer apply to DBS/ECS tuners. µPB1508GV is a shrink package version of

PB584G so that this small package contributes to reduce the mounting space.

µ

PB1508GV is manufactured using NEC’s high fT NESAT™ IV silicon bipolar process. This process uses silicon

µ

nitride passivation film and gold electrodes. These materials can protect chip surface from external pollution and
prevent corrosion/migration. Thus, this IC has excellent performance, uniformity and reliability.

FEATURES

• High toggle frequency : fin = 0.5 GHz to 3.0 GHz

• High-density surface mounting : 8 pin plastic SSOP (175 mil)

• Low current consumption : 5 V, 12 mA

• Fixed division :÷2

APPLICATION

• Prescaler between local oscillator and PLL frequency synthesizer included modulus prescaler

• DBS tuners with kit use of VHF/UHF band PLL frequency synthesizer

ORDERING INFORMATION

PART NUMBER PACKAGE MARKING SUPPLYING FORM

µ

PB1508GV-E1 8 pin plastic SSOP

(175 mil)

Remarks

To order evaluation samples, please contact your local NEC sales office.
(Part number for sample order:

µ

1508 Embossed tape 8 mm wide. Pin 1 is in tape pull-out

direction. 1 000 p/reel.

PB1508GV)

Document No. P10768EJ2V0DS00 (2nd edition)
Date Published September 1997 N
Printed in Japan

Caution: Electro-static sensitive devices

1996©

PIN CONNECTION (Top View)

1

2

3

4

PRODUCT LINE-UP

Product No. ICC (mA) fin (GHz) VCC (V) Package Pin Connection
PB581A 30 0.5 to 2.8 4.5 to 5.5 8 pins CAN –

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PB581C 30 0.5 to 2.2 4.5 to 5.5 8 pins DIP (300 mil) NEC Original

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PB584G 18 0.5 to 2.5 4.5 to 5.5 8 pins SOP (225 mil) NEC Original

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PB1508GV 12 0.5 to 3.0 4.5 to 5.5 8 pins SSOP (175 mil)

µ

8

7

6

5

µµµµ

PB1508GV

Pin No. Pin name

1V
2IN
3IN
4 GND
5 GND
6NC
7 OUT
8NC

CC

Remarks

This table shows the TYP values of main parameters. Please refer to ELECTRICAL

CHARACTERISTICS.

PB581A, µPB581C and µPB584G are discontinued.

µ

INTERNAL BLOCK DIAGRAM

IN

IN

SYSTEM APPLICATION EXAMPLE
RF unit block of DBS tuners

1stIF input
from DBS converter

BPF

D
CLK

CLK

OSC

MIX

Q
Q

AMP

SAW AGC amp. FM demo.

PB1508GV

µ

÷ 2
Prescaler

OUT

Baseband output

PLLsynth.
for VHF/UHF
band

LPF

2

PIN EXPLANATION

Pin No. Symbol Applied voltage PIN voltage Functions and explanation

µµµµ

PB1508GV

1VCC4.5 to 5.5

2IN

3IN

4, 5 GND 0

6, 8 NC

7 OUT










1.7 to 4.95 Signal input pin. This pin should be coupled to signal

1.7 to 4.95 Signal input bypass pin. This pin must be equipped with



1.0 to 4.7 Divided frequency output pin. This pin is designed as

Power supply pin. This pin must be equipped with bypass
capacitor (eg 1 000 pF) to minimize ground impedance.

source with capacitor (eg 1 000 pF) for DC cut.

bypass capacitor (eg 1 000 pF) to minimize ground
impedance.

Ground pin. Ground pattern on the board should be
formed as wide as possible to minimize ground
impedance.

Non connection pins. These pins should be opened.

emitter follower output. This pin can be connected to
input of prescaler within PLL synthesizer through DC cut
capacitor.

3

ABSOLUTE MAXIMUM RATINGS

PARAMETER SYMBOL CONDITION RATINGS UNIT

µµµµ

PB1508GV

Supply voltage V
Input voltage V
Total power dissipation P

CC

in

D

TA = +25 °C 6.0 V
TA = +25 °C 6.0 V
Mounted on double sided copper clad

50 × 50 × 1.6 mm epoxy glass PWB (T
Operating ambient temperature T
Storage temperature T

A

stg

RECOMMENDED OPERATING CONDITIONS

PARAMETER SYMBOL MIN. TYP. MAX. UNIT REMARKS
Supply voltage V
Operating ambient temperature T

ELECTRICAL CHARACTERISTICS (TA =

PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT
Circuit current I
Upper limit operating frequency 1 f
Upper limit operating frequency 2 f
Lower limit operating frequency f
Input power 1 P
Input power 2 P
Output power P

CC

A

CC

in(U)1

in(U)2

in(L)

4.5 5.0 5.5 V

−

40 to +85

−−−−

in1

in2

out

250 mW

A

= +85 °C)

40 to +85

−

55 to +150

−

40 +25 +85

C, VCC = 4.5 to 5.5 V, ZS = ZL = 50

°°°°

C

°

)

ΩΩΩΩ

No signals 7.6 12 14.5 mA
Pin = −10 to +6 dBm 3.0
Pin = −15 to +6 dBm 2.7
Pin = −15 to +6 dBm
fin = 2.7 to 3.0 GHz
fin = 0.5 to 2.7 GHz
Pin = 0 dBm, fin = 2 GHz



10

−

15

−

12

−




0.5 GHz




−

7

+6 dBm
+6 dBm



GHz
GHz

dBm

C

°

C

°

4