msm7532 Oki Semiconductor, msm7532 Datasheet

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msm7532

Manufacturer Part Number
msm7532
Description
Single Chip Msk Modem With Compandor For Cordless Telephone
Manufacturer
Oki Semiconductor
Datasheet

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MSM7532
Single Chip MSK Modem with Compandor for Cordless Telephone
E2A0039-16-X2
GENERAL DESCRIPTION
The MSM7532 is a baseband device with a modem function and a baseband voice signal processing
function for analog cordless telephone. The voice signal transmitter in this IC consists of a high-pass
filter, compressor, scrambler, pre-emphasis, limiter, and splatter filter.
The voice signal receiver consists of a bandpass filter, a de-scrambler , a de-emphasis, an expander,
an electronic volume, and a ceramic receiver driving circuit.
The MODEM in this IC transmits and receives MSK (Minimum Shift Keying) modem signals.
FEATURES
• Built-in ceramic receiver drive amplifiers
• The compander input reference level, limiter level, and modem transmit level are easy to be
• Built-in 2-bit electronic volume
• A microphone amplifier and an amplifier available for users are built in.
• Mode settings using parallel interfaces
• Built-in compander dynamic range: 70 dB
• Built-in maximum gain limit circuit for expander
• The bit rate of MSK modem is switchable between 2400 bps and 1200 bps.
• Scrambler and emphasis can be used by serially connecting them or can be used separately with
• Three kinds of the reverse frequency of the scrambler are selectable.
• The modem receiver functions detect bit synchronous signals and frame synchronous signals.
• Four-step power down modes
• Built-in crystal oscillation circuit
• Wide range of power supply (1.8 V to 5.5 V)
• Package:
externally adjusted.
each other.
56-pin plastic QFP (QFP56-P-910-0.65-2K) (Product name : MSM7532GS-2K)
Previous version: Nov. 1996
This version: Jan. 1998
MSM7532
1/21

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msm7532 Summary of contents

Page 1

... Single Chip MSK Modem with Compandor for Cordless Telephone GENERAL DESCRIPTION The MSM7532 is a baseband device with a modem function and a baseband voice signal processing function for analog cordless telephone. The voice signal transmitter in this IC consists of a high-pass filter, compressor, scrambler, pre-emphasis, limiter, and splatter filter. ...

Page 2

TVIO SW1 TVI – COM- PRESSOR + MICO PRE MICN – BPF + MICP SD MOD ST BR MODL RAIO SW7 RAI – RBPF DE-SCR + V DD GND SGO VOLTAGE SG OSC REF. SGI SW2 PRE- HPF1 LIMITER EMPHASIS ...

Page 3

... BYP 5 TVIO 6 TVI 7 MICO 8 MICN 9 MICP 10 CMPI 11 12 TAO UAI 13 UAO 14 Notes: The pin 49 should be used for V The pin 21 should be connected to V 56-Pin Plastic QFP . DD or opened. DD MSM7532 42 PDRC 41 RCN 40 RCP 39 RVBU 38 CSH 37 VOL1 36 VOL2 35 RVO 34 RAI 33 RAIO 32 EMP 31 CE1 30 CE2 29 ...

Page 4

... Transmit Modem Receive Modem Processing Section X OFF OFF X OFF OFF X OFF OFF 1 OFF Expander is connected to the path. Expander is bypassed to the path. MSM7532 Crystal Oscillation Circuit OFF OFF OFF Don't care Receive side Note SW1 is larger (e. g and V ...

Page 5

... RC-active filter configuration> C5 R32 C26 R33 In the case kHz, gain : 0 dB CMPI C4 TVIO C7 TVI – + SGO R9 = R10 = R11 = 0.22 mF 510 pF 110 pF CMPI C4 TVIO TVI – + R32 = R33 = 0.22 mF, C26 = 300 pF MSM7532 Compressor VTVI C4, C5 for DC cutoff Compressor VTVI 5/21 ...

Page 6

... If this amplifier is not used, connect UAI to UAO directly and remove R1, R2, C1, and C28. MICO MICN – + MICP TAO No signal output (potential = Voice signal output (signal from TVI, TVIO) MSK modulator output C1 UAO UAI R1 + – C28 R2 TAO MSM7532 Note SW6 SW5 X: Don't care 6/21 ...

Page 7

... CPDL R4 R6 SGO pin and SGO pin is divided by the resistors REF = 20 · log ( 0.5 (dBV) OX MODL pin and SGO pin is divided by the resistors. REF LIML = 20 · log (V ) – 3.0 (dBV) LIML LIML MSM7532 R7 R8 (V), the TAO output level is MODL (V), the limiter level is expressed 7/21 ...

Page 8

... REF = · log (V ) – 5.8 (dBV) IES CPDL To internal circuit SGI SGO + – Data Signaling Rate 0 1200 bps 1 2400 bps MSM7532 To splatter filter , the compressor and expander CPDL . If the power has a lot DD to reduce supply noises C25 Note SW8 8/21 ...

Page 9

... Receive side De-emphasis circuit is bypassed to the path De-emphasis circuit is connected to the path C27 RAIO R35 RAI – + R34 = R35 = 51 kW C19 = 0.22 mF, C27 = 300 pF RVO ) SG VOL2 VOL1 Gain – –12 dB MSM7532 Note SW2 VRAI Note SW7 9/21 ...

Page 10

... If an external clock is used, with X1 opened, the clock should be input from X2 through a 200 pF capacitor. C21 C22 3.6864 MHz R16 RCN RCP C29 R17 R18 RVBU R19 R16 = R17 = 1.5 kW R18 ≥ RVO High-speed CMOS or TTL, etc 3.6864 MHz X2 X1 Open MSM7532 Ceramic receiver (Equivalent capacitance : 68 nF) X2 200 pF X1 10/21 ...

Page 11

... Outputs demodulation serial data for receive signals. Since the RD data is output in synchronization with the falling edges of re-generated timing clock pulse RT recommended that the data be latched on the rising edge of RT. If FDE is at "1" level and "0" level, RD remains set at "1" level MSM7532 11/21 ...

Page 12

... AC4D6H) Transmit side DE-SCR and LPF2 are bypassed LPF2 is connected but De-scrambler (DE-SCR) is bypassed DEM-BPF output is connected to RVO pin via RC-LPF (for IC test) De-scrambler circuit works MSM7532 Receiver Handset Base station Handset Base station Receive side Note SW4 ...

Page 13

... Refer to the PDN pin description. ST Transmit data timing clock output pin. Signals on the SD pin are accepted in synchronization with the leading edges of the signals from the ST pin "0" level, ST remains set at "1" level. MSM7532 13/21 ...

Page 14

... MSM7532 Rating Unit –0 –0 +0.3 DD –30 to +70 °C –55 to +150 Min Typ Max Unit +1.8 +2.4 +5.5 V –30 +25 +70 ° ...

Page 15

... Number of data bits required for the PLL to be Locked in within the phase difference of 22.5˚ or less B N Number of data bits required for the PLL to be Locked in within the phase difference of 90˚ or less MSM7532 ( –30 to 70°C) DD Min Typ Max Unit — ...

Page 16

... FT30 BYP = "1" FT50 SEC = "0" RCK1 = "0" FR1 100 Hz RCK2 = "0" FR3 300 Hz Reference = 1 kHz FR25 2.5 kHz FR30 FR50 MSM7532 ( –30 to 70°C) DD Min Typ Max Unit –16 –15 –14 dBV — –48 –40 dB — ...

Page 17

... Input Level, –26 dBV Æ –20 dBV T AT2 Input Level, –20 dBV Æ –26 dBV T RE2 GEV1 VOL1 = VOL2 = "0" GEV2 Referenced to RVO level at "0" GEV3 –12 dB MSM7532 ( –30 to 70°C) DD Min Typ Max Unit — 40 — W 1.35 1.5 — ...

Page 18

... SGO, SGI SG V TAO, RVO AO Symbol Condition t S Refer to Fig Refer to Fig Refer pin description MSM7532 ( –30 to 70°C) DD Min Typ Max Unit — 10 — MW — 200 — — — — ...

Page 19

... Semiconductor TIMING DIAGRAM ST 50 FD, RD FDE RT Internal 50 Figure 1 Input Data Timing 50% 50 Figure 2 Output Data Timing N-2 N-1 N-2, N- Frame synchronous signal Figure 3 Receive Signal Timing MSM7532 19/21 ...

Page 20

... FPS Setup Input RCK2 Reverse Frequency Select RCK1 Scrambler and Bypass SEC Switching ME MSK Modulator Control Transmit Data ST Timing Clock Note: An arrow mark ( ) indicates connection to the SGO pin. MSM7532 CE3N BR MODEM Signaling Rate Swiching SGO C25 C25 SGI C3 CPDL ...

Page 21

... Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). MSM7532 (Unit : mm) Package material Epoxy resin ...

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