Features: (
/4 Shift QPSK Modem)
• Built-in root Nyquist filter (a (rolloff rate) = 0.5) for the baseband limiter
• Differential I and Q analog outputs
• The DC offset and gain can be adjusted with respect to the differential I and Q analog outputs
• Completely digitized
/4 shift QPSK demodulator system
• Input IF signal frequency of 1.2 MHz or 10.8 MHz is available.
• Built-in A/D converter for RSSI detection (ADPCM CODEC)
• ADPCM : ITU-T Recommendations G.721 (32 kbps)
• Transmit/receive full duplex capability
• PCM interface code format: selectable between m-law and A-law
• Built-in transmit/receive mute function and transmit/receive programmable gain setting function
• Side tone path formation and level adjustment capabilities
• Built-in DTMF tone and other tones
• Built-in VOX function
• Built-in speech recording/playing interface
• Built-in 150
driving OP AMP
• Built-in various analog switches (Common)
• Single 3V power supply (V
DD: 2.7 V to 3.6 V)
• Mode setting through serial interface
• Low power consumption
When the modem unit is operating : 13 mA Typ. (V
DD = 3.0 V)
When the ADPCM CODEC unit is operating : 7 mA Typ. (V
DD = 3.0 V)
When in the power down mode : 0.03 mA Typ. (V
DD = 3.0 V)
• Package:80-pin plastic TQFP (TQFP80-P-1212-0.50-K) (Product name : MSM7584CTS-K)
Pinout
Specifications
|
Symbol |
Parameter |
Conditions |
Limits |
Unit |
|
VDD |
Power Supply Voltage |
-
|
_0.3 to +5 |
V |
|
VAIN |
Analog Input Voltage |
0.3 to VDD + 0.3 |
V |
|
VDIN |
Digital Input Voltage |
0.3 to VDD + 0.3 |
V |
|
TSTG |
Storage Temperature |
55 to +150 |
°C |
DescriptionThe MSM7584D is a CMOS IC developed for use with digital cordless telephones. The device provides a /4 shift QPSK modem function and a CODEC function which performs transcoding between the voice band analog signal and 32 kbps ADPCM data.
The MSM7584C is ideal for use in a handset of the PHS (Personal Handyphone System).
MSM7584D Data Sheet
