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Sony Semiconductor Electronic Components Datasheet

CXA1851N Datasheet

Up/Down Converter for 900 MHz-Band Mobile Communications

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CXA1851N pdf
CXA1851N
Up/Down Converter for 900 MHz-Band Mobile Communications
For the availability of this product, please contact the sales office.
Description
The CXA1851N is an up/down converter IC for
900 MHz-band mobile communications.
This is suitable for 900 MHz-band digital cordless
telephone (CT2) and digital cellular.
20 pin SSOP (Plastic)
Features
• Transmission/reception converter on a single chip
• Operating frequency: 800 to 900 MHz
• Supply voltage: 2.7 to 4.5 V
• Power saving function
• 20-pin SSOP package used for set size reduction
Applications
• CT2 digital cordless telephone
• Digital cellular
Structure
Bipolar silicon monolithic IC
Block Diagram and Pin Configuration
Absolute Maximum Ratings (Ta=25°C)
• Supply voltage
Vcc 5
V
• Operating temperature Topr –20 to +75 °C
• Storage temperature Tstg –65 to +150 °C
• Allowable power dissipation
PD
530
mW
When mounted on a 505×0×1.6 mm copper-
foiled glass epoxy board
Recommended Operating Conditions
Supply voltage
Vcc 2.7 to 4.5
V
20 19 18 17 16 15 14 13 12 11
MIX
MIX
1 2 3 4 5 6 7 8 9 10
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
—1—
E93505-TE


Sony Semiconductor Electronic Components Datasheet

CXA1851N Datasheet

Up/Down Converter for 900 MHz-Band Mobile Communications

No Preview Available !

CXA1851N pdf
CXA1851N
Pin Description
Pin No. Symbol
Typical pin
voltage (V)
1 GND
0.0
2 RF BYPASS 1.1
3 RF INPUT
0.9
Equivalent circuit
REG
4 PEAKING
OUT
0.12
3
4
5 P/S
(for DOWN
CONV.)
0 to 4.5
6 P/S
(for UP
CONV.)
0 to 4.5
7 VCC
(for Up
CONV.)
2.7 to 4.5
8 RF OUTPUT 2.7
(Vcc=2.7V)
9 GND
0.0
5
6
REG
8
Description
GND pin for the down converter.
MIX input by-pass pin for the down
converter.
RF input pin for the down
converter. Because of high
impedance, a 4.7 nH external chip
inductor should be used for
2 impedance matching.
Emitter pin for the low-noise
REG amplifier. Connect an approximate-
ly 3 pF chip capacitor and an
approximately 22chip resistor in
series to the GND.
Power saving control pin for the
down converter.
OFF when Vp/s1.0 V; ON when
Vp/s1.8 V
Power saving control pin for the up
converter.
OFF when Vp/s1.0 V; ON when
Vp/s1.8 V
Power supply for the up converter.
RF output pin for the up converter.
Connect this pin to the Pin 7 power
supply via the 15 nH chip inductor.
GND pin for the up converter RF
amplifier.
—2—


Part Number CXA1851N
Description Up/Down Converter for 900 MHz-Band Mobile Communications
Maker Sony Corporation
Total Page 12 Pages
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