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MSM7557

Single Chip MSK Modem with Compandor for Cordless Telephone

Oki Electric Industry 

¡ Semiconductor

MSM7557

(Continued)

DYN = "0" : VDD = 2.7 V to 5.5 V, Ta = –30°C to 70°C

DYN = "1" : VDD = 4.5 V to 5.5 V, Ta = –30°C to 70°C

Parameter

Symbol

Condition

Min.

Typ. Max. Unit

Standard Input

Level

VICS

Maximum Input

fIN = 1 kHz

Level

VICM

DYN = "0" –16.1

–13.7 –11.3

DYN = "1" –7.1

DYN = "0"

—

–5.5

–3.9

—

–7

dBV

DYN = "1"

—

—

+1.0

Output

Level *3

GC2

GC4 fIN = 1 kHz

GC5

–20 dB –10.6

–9.9

–9.2

–40 dB

–21.0

–19.8 –18.6

dB

–60 dB

—

–29.5

—

Attack Time

Recovery Time

TAT1 DYN = "0", C6 = 0.22 mF

TAT2 DYN = "1", C6 = 0.47 mF

TRE1 DYN = "0", C6 = 0.22 mF

TRE2 DYN = "1", C6 = 0.47 mF

—

3.4

—

—

3.5

—

ms

—

17

—

—

16

—

Standard Input

VIES

Level

*4

–12.9

–10.8

–8.7

*5

–13.3

–11.2

–9.1

Maximum

Output Level

fIN = 1 kHz

VIEM

*6

–4.7

DYN = "0"

—

DYN = "1"

—

–3.1

–1.5

dBV

—

–6

—

+2

Output

Level

GE1

–10 dB –21.5

–20

–18.3

GE2 fIN = 1 kHz *3

–20 dB –42.2

–40

–37.5

dB

GE3

–30 dB

—

–59

—

Attack

Time

Recovery

Time

TAT3 DYN = "0", C13 = 0.22 mF

TAT4 DYN = "1", C13 = 0.47 mF

TRE3 DYN = "0", C13 = 0.22 mF

TRE4 DYN = "1", C13 = 0.47 mF

—

3.4

—

—

3.5

—

ms

—

17

—

—

16

—

*3 0 dB is defined as the input level and the output level when the standard input

level is input.

*4 VDD = 3.6 V, DYN = "0"

*5 VDD = 5.0 V, DYN = "0"

*6 VDD = 5.0 V, DYN = "1"

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