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CXA1744AR

IF Amplifier for Digital Cordless Telephone

Sony Semiconductor 

CXA1744AR

Pin

No.

Symbol

Typical pin

voltage

10 ICOMPIN

—

11 ICOMPINX

12 ICOMPOUT

—

Equivalent circuit

VCC

129

10

129

11

Description

Sample-and-hold circuit input.

ICOMPIN is for in-phase input.

ICOMPINX is for out-of-phase input.

GND

VCC

Sample-and-hold circuit output.

12

13

GND

14 CURREF

0V

1.25V

15

VREF

1.9V

129

14

15

16 FCOMPOUT —

16

GND

VCC

1.25V

GND

VCC

GND for circuits other than the MIX,

OSC, MULTI, and RSSI circuits.

Adjustment for RSSI output current.

Connects a resistor between this pin

and GND.

Reference voltage.

Leave this pin open normally.

1.25V

GND

VCC

Comparator output for free-channel

detection.

17 FCOMPINX

—

18 FCOMPIN

129

17

129

18

GND

VCC

Comparator input for free-channel

detection.

FCOMPINX is for out-of-phase input.

FCOMPIN is for in-phase input.

GND

—4—

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