DATA SHEET
BIPOLAR DIGITAL INTEGRATED CIRCUIT
µ
PB1508GV
3 GHz INPUT DIVIDE BY 2 PRESCALER IC
FOR DBS TUNERS
µ
PB1508GV is a 3.0 GHz input divide by 2 prescaler IC for DBS tuner applications.
µ
PB1508GV can make
VHF/UHF band PLL frequency synthesizer apply to DBS/ECS tuners.
µ
PB1508GV is a shrink package version of
µ
PB584G so that this small package contributes to reduce the mounting space.
µ
PB1508GV is manufactured using NEC’s high f
T
NESAT™ IV silicon bipolar process. This process uses silicon
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
Low current consumption
Fixed division
: f
in
= 0.5 GHz to 3.0 GHz
: 5 V, 12 mA
:
÷2
High-density surface mounting : 8 pin plastic SSOP (175 mil)
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
8 pin plastic SSOP
(175 mil)
MARKING
1508
SUPPLYING FORM
Embossed tape 8 mm wide. Pin 1 is in tape pull-out
direction. 1 000 p/reel.
µ
PB1508GV-E1
Remarks
To order evaluation samples, please contact your local NEC sales office.
(Part number for sample order:
µ
PB1508GV)
Caution: Electro-static sensitive devices
Document No. P10768EJ2V0DS00 (2nd edition)
Date Published September 1997 N
Printed in Japan
©
1996
µ
PB1508GV
PIN CONNECTION (Top View)
Pin No.
1
8
Pin name
V
CC
IN
IN
GND
GND
NC
OUT
NC
1
2
2
7
3
3
6
4
5
4
5
6
7
8
PRODUCT LINE-UP
Product No.
I
CC
(mA)
30
30
18
12
f
in
(GHz)
0.5 to 2.8
0.5 to 2.2
0.5 to 2.5
0.5 to 3.0
V
CC
(V)
4.5 to 5.5
4.5 to 5.5
4.5 to 5.5
4.5 to 5.5
Package
8 pins CAN
8 pins DIP (300 mil)
8 pins SOP (225 mil)
8 pins SSOP (175 mil)
Pin Connection
–
NEC Original
NEC Original
µ
PB581A
µ
PB581C
µ
PB584G
µ
PB1508GV
Remarks
This table shows the TYP values of main parameters. Please refer to ELECTRICAL
CHARACTERISTICS.
µ
PB581A,
µ
PB581C and
µ
PB584G are discontinued.
INTERNAL BLOCK DIAGRAM
D
CLK
Q
IN
CLK
Q
AMP
OUT
IN
SYSTEM APPLICATION EXAMPLE
RF unit block of DBS tuners
1stIF input
from DBS converter
BPF
MIX
SAW
AGC amp.
FM demo.
Baseband output
µ
PB1508GV
OSC
÷2
Prescaler
PLLsynth.
for VHF/UHF
band
LPF
2
µ
PB1508GV
PIN EXPLANATION
Pin No.
1
Symbol
V
CC
Applied voltage
4.5 to 5.5
PIN voltage
Functions and explanation
Power supply pin. This pin must be equipped with bypass
capacitor (eg 1 000 pF) to minimize ground impedance.
Signal input pin. This pin should be coupled to signal
source with capacitor (eg 1 000 pF) for DC cut.
Signal input bypass pin. This pin must be equipped with
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.
Divided frequency output pin. This pin is designed as
emitter follower output. This pin can be connected to
input of prescaler within PLL synthesizer through DC cut
capacitor.
2
IN
1.7 to 4.95
3
IN
1.7 to 4.95
4, 5
GND
0
6, 8
7
NC
OUT
1.0 to 4.7
3
µ
PB1508GV
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply voltage
Input voltage
Total power dissipation
SYMBOL
V
CC
V
in
P
D
T
A
= +25
°C
T
A
= +25
°C
Mounted on double sided copper clad
50
×
50
×
1.6 mm epoxy glass PWB (T
A
= +85
°C)
CONDITION
RATINGS
6.0
6.0
250
−40
to +85
−55
to +150
UNIT
V
V
mW
°C
°C
Operating ambient temperature
Storage temperature
T
A
T
stg
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply voltage
Operating ambient temperature
SYMBOL
V
CC
T
A
MIN.
4.5
−40
TYP.
5.0
+25
MAX.
5.5
+85
UNIT
V
°C
REMARKS
ELECTRICAL CHARACTERISTICS (T
A
=
−
40 to +85
°
C, V
CC
= 4.5 to 5.5 V, Z
S
= Z
L
= 50
Ω
)
PARAMETER
Circuit current
Upper limit operating frequency 1
Upper limit operating frequency 2
Lower limit operating frequency
Input power 1
Input power 2
Output power
SYMBOL
I
CC
f
in(U)1
f
in(U)2
f
in(L)
P
in1
P
in2
P
out
TEST CONDITION
No signals
P
in
=
−10
to +6 dBm
P
in
=
−15
to +6 dBm
P
in
=
−15
to +6 dBm
f
in
= 2.7 to 3.0 GHz
f
in
= 0.5 to 2.7 GHz
P
in
= 0 dBm, f
in
= 2 GHz
MIN.
7.6
3.0
2.7
−10
−15
−12
TYP.
12
−7
MAX.
14.5
0.5
+6
+6
UNIT
mA
GHz
GHz
GHz
dBm
dBm
dBm
4
µ
PB1508GV
TYPICAL CHARACTERISTICS (unless otherwise specified T
A
= +25°C)
CIRCUIT CURRENT vs. SUPPLY VOLTAGE
15
No signals
T
A
= +85 ˚C
I
CC
- Circuit Current - mA
10
T
A
= +25 ˚C
5
T
A
= –40 ˚C
0
0
1
2
3
4
V
CC
- Supply Voltage - V
5
6
INPUT POWER vs. INPUT FREQUENCY
+20
T
A
= +25 ˚C
+10
+10
V
CC
= 4.5 to 5.5 V
+20
INPUT POWER vs. INPUT FREQUENCY
V
CC
= 4.5 to 5.5 V
T
A
= –40 ˚C
T
A
= +85 ˚C
T
A
= +85 ˚C
T
A
= +25 ˚C
Guaranteed
Operating
Window
P
in
- Input Power - dBm
0
–10
–20
–30
–40
–50
P
in
- Input Power - dBm
Guaranteed
Operating
Window
0
–10
–20
–30
–40
–50
V
CC
= 4.5 to 5.5 V
T
A
= +25 ˚C
T
A
= –40 ˚C
–60
100
1000
f
in
- Input Frequency - MHz
4000
–60
100
1000
f
in
-Input Frequency - MHz
4000
OUTPUT POWER vs. INPUT FREQUENCY
V
CC
= 5.0 V
P
in
= 0 dBm
–2 Z
L
= 50
Ω
0
0
OUTPUT POWER vs. INPUT FREQUENCY
T
A
= +25 ˚C
P
in
= 0 dBm
–2 Z
L
= 50
Ω
V
CC
= 5.5 V
T
A
= +25 ˚C
T
A
= –40 ˚C
T
A
= –40 ˚C
P
out
- Output Power - dBm
–6
–8
T
A
= +85 ˚C
P
out
- Output Power - dBm
–4
–4
–6
–8
–10
–12
–14
V
CC
= 5.0 V
V
CC
= 4.5 V
T
A
= +85 ˚C
–10
–12
–14
–16
100
1000
f
in
- Input Frequency - MHz
4000
T
A
= +25 ˚C
–16
100
1000
f
in
-Input Frequency - MHz
4000
5
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