Features: • Power supply : +5 V ±10%, +2.5 V or higher for digital interface.
• Power consumption
Operating mode : 9 mA Typ., 12 mA Max.
Power down mode : 0.1 mA Max.
• The operating mode can be selected from PB tone transmit, PB tone detect, and FSK modem (answer/originate). The FSK modem cannot be operated concurrently with other functions.
Modem test modes are also available.
• The call progress tone (CPT) detector operates in PB tone transmit mode or in FSK modem mode.
• PB receiver output is 3-state, and externally connectable to 4-bit input for PB tone generator through the bus line.
• Modem transmit/receive data, carrier detect, request to send, and call progress tone detect have their dedicated pins.
• Prefilter and smoothing filter are provided in analog input and output.
• On-chip 3.579545 MHz crystal oscillator
• 3.579545 MHz master clock output pin (CMOS compatible)
• Power down mode
• Modem : Conforms to ITU-T V.21 (300 bps, full-duplex)
• Transmit analog signals (modem signal, DTMF tone) : Level is independently adjustable externally. Carrier detect level is also adjustable externally.
• Package options:
42-pin plastic DIP (DIP42-P-600-2.54) (Product name : MSM6889RS)
56-pin plastic QFP (QFP56-P-1519-1.00-K) (Product name : MSM6889GSK)
Pinout
Specifications
|
Parameter |
Symbol |
Condition |
Rating |
Unit |
| Power Supply Voltage |
VA,VD |
Ta = 25°C
with respect to AG and DG |
0.3 to 7 |
V |
|
VD2 |
0.3 to VD |
| Input Pin Voltage |
|
0.3 to VA(VD)+ 0.3 |
| Storage Temperature |
|
- |
65 to 150 |
°C |
| Pin Soldering Temperature |
|
Within 10 sec |
260 |
DescriptionThe MSM6889 is best suited to be used as a signal transmitter/receiver LSI for a telemetering system that employs a no-ringing communication system.
The meter terminal of a telemetering system consists of this device, meter, NCU, and communication controller.
The MSM6889 contains a PB tone detector, a call progress tone (CPT) detector, a PB tone generator, and a 300-bps full-duplex modem conforming to ITU-T V.21.
MSM6889 Data Sheet
