msm7557 Oki Semiconductor, msm7557 Datasheet
msm7557
Related parts for msm7557
msm7557 Summary of contents
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... Single Chip MSK Modem with Compandor for Cordless Telephone GENERAL DESCRIPTION The MSM7557 is a single chip MSK modem with base band voice processor for cordless telephone. The MSM7557 voice transmit block consists of high pass filter, compressor, pre-emphasis, limiter and splatter filter. ...
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TVIO TVI Com- HPF1 pressor SD ST MOD BR VR1 VR2 VR3 BYP VDD GND OSC X2 RAIO De- RAI RBPF Emphasis Voltage PDN PDN REF Pre- Splatter Limiter Emphasis Filter RC- LPF DEM- Mix LPF Mixer ...
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... VR3 TVIO 10 CMPI 11 TVI 12 CC1 13 CC2 14 Notes: The pin 49 should be used for V The pin 21 should be connected connect pin opened. DD MSM7557 NC BIT FDE BR BYP RCK2 RCK1 SEC CSH RAI NC RAIO CE3P NC 3/25 ...
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... This internal clamp level is made by internal reference voltage which is unrelated with V Negative clamp level is made by internal operational amplifier and the voltage is reversed at VSG. Description t MS De-emphasis circuit is bypassed to the path De-emphasis circuit is connected to the path 0.50 V 1.26 V MSM7557 Receive side Limiter level –9 dBV –1 dBV . DD 4/25 ...
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... VR1 + VR2 – + VR3 CMPI Compressor C19 R5 TVIO C3 TVI – Example kHz and 0 dB gain 0.22 mF 510 pF 110 pF MSM7557 R1 ≥ ≥ ≥ ≥ and C19 are used for DC cut. VTVI 5/25 ...
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... V (Base station), by setting DYN = "1" lower than 4.5 V (Hand-set) DYN shall be digital "0" close physical proximity to the device. DD TVE TAO No signal output (potential = SG) 0 Voice signal output 1 X MSK modulator output RVO Output disable (potential = SG) Output enable MSM7557 X : Don't care 6/25 ...
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... Compressor is bypassed to the path. Modem data signaling rate select pin. BR Function RCK2 Upper Limit of Voice Band 1 3306 Hz 0 3400 Hz 1 3500 Hz Transmit side Expander is connected to the path. Expander is bypassed to the path. BR Date signaling rate 0 1200 bps 1 2400 bps MSM7557 Receive side 7/25 ...
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... This device is sensitive to power supply noises as switched capacitor tequniques are utilized bypass capacitor of more than 10 mF between V the performance. Function Detect pattern (=9336H) (=C4D6H) (=A9336H) (=AC4D6H) (Note : This pattern is for Japanese Cordless Telephone.) and GND pin should be connected to ensure DD MSM7557 Receiver Handset side Base station Handset side Base station 8/25 ...
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... Refer to TAO pin description. Transmit side voice signal contorol. TVE Refer to TAO pin description. Function Voice control Transmit side RVE TVE path 0 X OFF 1 X OFF 0 0 OFF ON MSM7557 Receive side modem modem OFF OFF OFF Don't care 9/25 ...
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... BR = "1" — 2400 — — DYN = "0" — DYN = "1" — — — RL ≥ 40kW — — — — — — — MSM7557 Rating Unit V + 0.3 DD °C Max. Unit 3.6 5.5 V 5.0 5.5 +25 +70 °C 3.6868 MHz — bit/sec — ...
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... V (mode 4) Power down — 5.5 V mode 1 Power down — mode 2 3.6 V Power down — mode – — 0. – 0. MSM7557 Typ. Max. Unit 9 14 3.8 7.0 mA 4.6 9.0 mA — +10 — 0.2V DD — — 0.1V DD — 11/25 ...
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... PLL to be locked in within the — phase difference of 22.5° or less Number of data bits required for the PLL to be locked in within the — phase difference of 90° or less MSM7557 Typ. Max. Unit 1201 1801 Hz 1201 2401 –9 –7 –1 ...
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... RCK2 = "0" 3.4 kHz +8.5 Ref kHz 6 kHz — 100 Hz +1.5 EMP = "1" 300 Hz +8.0 BYP = "1" 2.5 kHz –9.5 RCK2 = "0" 3.4 kHz –12.5 Ref kHz 6 kHz — MSM7557 Typ. Max. Unit — –6 — +2 dBV –9 –8 –1 0 –40 — –40 — dB –0.2 +1 – ...
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... IN DYN = "0" — DYN = "1" — –10 dB –21 kHz *3 –20 dB –42.2 IN –30 dB — — — — — MSM7557 Typ. Max. Unit –13.7 –11.3 –5.5 –3.9 dBV — –7 — +1.0 –9.9 –9.2 dB –19.8 –18.6 –29.5 — 3.4 — ...
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... DYN = "0" 2 5 –30°C to 70°C DD DYN = "1" 4 5 –30°C to 70°C DD Condition Min. 1 Refer to Fig Refer to Fig. 1 –300 0 Refer to Fig. 1 MSM7557 Typ. Max. Unit 10 — 200 — 1750 — 600 — W 100 — ...
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... Semiconductor TIMING DIAGRAM FD,RD Figure 2 Output Data Timing FDE RT Internal N-2, N- Frame shnchronous signal Figure 3 Receive Signal Timing 50% 50 Figure 1 Input Data Timing 50% 50 N-2 N-1 MSM7557 16/25 ...
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... LIM pin shall be supplied over VSG voltage. Notes 1 ) R11 is protection resister from external extra voltage Resistor value of R11 and R12 changes 0.7 to 1.3 times from the typical value by lot variation and temperature variation. A R12 + R11 : 1 kW – R12 : 200 kW Reverse Limiter MSM7557 Splatter filter 17/25 ...
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... Frame detection signal Internal RT FDE Internal RD Full power down signal (Internal signal) Receiver 9336H S.H. Frame synchronous C4D6H M.T. Frame synchronous A9336H S.H. Bit + Frame synchronous AC4D6H M.T. Bit + Frame synchronous MSM7557 Note 18/25 ...
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... Frame synchronous detector FDE DYN control SG BR Modem data signaling rate select GND BYP Compandor path select RCK1 TAO RVO RCK2 CE1 SEC + – CE2 CSH C15 R6 CE3N RAI C16 R7 CE3P RAIO MSM7557 3.6864 MHz Voice band select C18 R8 Receive signal input C17 19/25 ...
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... Semiconductor MSM7557 Filter Characteristics MSM7557 has wide band filters (0.3 kHz to 3.4 kHz) as follows. Pre-Emphasis ........................................................................................................ Fig. 4 Splatter Filter ........................................................................................................ Fig. 5 RBPF ....................................................................................................................... Fig. 6 De-Emphasis ......................................................................................................... Fig. 7 Transmit Total (HPF1 + Pre-Emphasis + Splatter) ......................................... Fig. 8 Receive Total (RBPF + De-Emphasis) ............................................................... Fig. 9 Transmit and Receive Total ................................................................................ Fig. 10 Fig Fig. 10 show the filter characteristics when RCK2 is digital "0". When RCK1 is digital "0" and RCK2 is digital " ...
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... Semiconductor 10 100 0 –10 –20 –30 100 0 –10 –20 –30 –40 –50 –60 –70 –80 1k 10k Figure 4 MSM7557 Pre–Emphasis 1k 10k F (–0.2 dB) = 3.4 kHz cut Figure 5 MSM7557 Splatter Filter MSM7557 FREQ [Hz] FREQ [Hz] 21/25 ...
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... Semiconductor 100 0 –10 –20 –30 –40 –50 –60 –70 – 100 0 –10 –20 1k 10k F (–0.2 dB) = 3.4 kHz cut Figure 6 MSM7557 RBPF 1k 10k Figure 7 MSM7557 De–Emphasis MSM7557 FREQ [Hz] FREQ [Hz] 22/25 ...
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... Semiconductor 10 100 0 –10 –20 –30 –40 –50 –60 –70 Figure 8 MSM7557 Transmit Total (HPF1 + Pre–Emphasis+Splatter) 10 100 0 –10 –20 –30 –40 –50 –60 –70 Figure 9 MSM7557 Receive Total (RBPF + De–Emphasis) 1k 10k FREQ [Hz] 1k 10k FREQ [Hz] MSM7557 23/25 ...
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... Semiconductor 100 0 –10 –20 –30 –40 –50 –60 –70 –80 Figure 10 MSM7557 Transmit and Receive Total 1k 10k FREQ [Hz] MSM7557 24/25 ...
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... 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). MSM7557 (Unit : mm) Package material Epoxy resin ...