CXA3003R 데이터 시트보기 (PDF) - Sony Semiconductor

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CXA3003R

Baseband analog processing IC for dual-mode CDMA/FM cellular phone

Sony Semiconductor 

CXA3003R

Typical

Pin

Symbol Voltage (V)

No.

DC AC

77 SLEEPB,

78

IDLEB,

0V

79

FMB

Equivalent circuit

VDD ADC

77

150

78

79

Description

Test mode switch pins.

These pins control this IC

function mode (∗1).

GND ADC

VDD RXIF

80 RXVCOOUT

80

Receive VCO output pin

connected the external PLL IC.

GND RXIF

∗1 Function Mode

Function Mode

FMB

CDMA RXTX

high

CDMA Idle

high

CDMA Sleep

high

FM RXTX

low

FM Idle

low

FM Idle (Transition)

low

FM RXTX (Transition) low

CDMA Sleep (Transition) high

IDLEB

high

low

low

high

low

low

high

high

SLEEPB

high

high

low

high

high

low

low

low

Mode functions explain:

1. CDMA RXTX :

This mode requires everything except the FM-

specific circuits to be operating.

2. CDMA Idle :

This mode powers down all transmit circuits

and FM receive.

3. CDMA Sleep :

This mode powers down everything except

the TCXO divider and TCXO/4 output driver.

4. FM RXTX :

This mode powers down all CDMA-specific

circuits except the CHIPx8 synthesizer.

5. FM Idle

:

This mode powers down all transmit and

CDMA Receive circuits.

—10—

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