MSM7532 View Datasheet(PDF) - Oki Electric Industry

Part Name

Description

Manufacturer

MSM7532

Single Chip MSK Modem with Compandor for Cordless Telephone

Oki Electric Industry 

¡ Semiconductor

RVBU

Ceramic receiver amplifier input pin.

Refer to the RCN, RCP description.

RCP, RCN

Ceramic receiver amplifier output pins.

–

RCN

+

RCP C29

RVBU

RC

RVO

LPF

MSM7532

R16

R17

R18

Ceramic receiver

(Equivalent capacitance : 68 nF)

R19

R16 = R17 = 1.5 kW

R18 ≥ 10 kW

C29 is a capacitor for oscillation prevention. Be sure to use a capacitor of 20 pF or more.

If no ceramic receiver amplifier is used, RVBU should be directly connected to RCP, RCN be open, and R16 to R19,

and C29 be removed.

PDRC

Pin used to control power down of the ceramic receiver amplifier.

If digital "1" is input in this pin, the two ceramic receiver amplifiers are powered down. If the LSI is

in power-down mode 1 or 2 (PDN = "1", RVE = "0"), the ceramic receiver amplifiers are powered

down even when the PDRC is at "0".

X1, X2

Crystal oscillator connection pins.

3.6864 MHz crystal oscillator should be connected.

If the load capacitance of the crystal oscillator is 16 pF, insert a 12 pF capacitor between X1 and GND

and between X2 and GND.

If an external clock is used, with X1 opened, the clock should be input from X2 through a 200 pF

capacitor.

C21

X2

C22

X1

3.6864 MHz

High-speed CMOS or TTL, etc

3.6864 MHz

Open

X2

200 pF

X1

10/21

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