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73M2901/5V
Advanced Single
®
TDK SEMICONDUCTOR CORP. Chip Modem
August 2001
FEATURES
DESCRIPTION
The 73M2901/5V is a single-chip modem that
· Low overall system chip count. True one
combines all the controller (DTE) and data pump
chip solution for embedded systems
functions necessary to implement an intelligent
· Low operating power (~250mW @ 5V,
V.22bis data modem. This device is based on TDK
automatic low power standby and power
Semiconductor’s implementation of the indu
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73M2901/5V Advanced Single Chip Modem The hybrid configuration is controlled by the state of HARDWARE DESCRIPTION the HBDEN pin. For driving a line-coupling The 73M2901/5V is designed for a single +5 volt transformer, HBDEN should be pulled high. For supply with low power consumption (~250mW @ 5 driving an external hybrid (load on TXAP and TXAN volts). The modem supports automatic standby idle is 50kW or larger), HBDEN should be pulled low. mode. The modem will also accept a req
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73M2901/5V Advanced Single Chip Modem RESET ASYNCHRONOUS AND SYNCHRONOUS SERIAL A reset is accomplished by holding the RESET pin DATA INTERFACE high. To ensure a proper power-on reset, the reset The serial data interface consists of the TXD and pin must be held high for a minimum of 3m s. At RXD data paths (LSBit shifted in and out first, power on, the voltage at VPD, VPA, and RESET respectively); and the TXCLK and RXCLK serial must come up at the same time for a proper reset.
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73M2901/5V Advanced Single Chip Modem PIN DESCRIPTIONS (continued) OSCILLATOR PIN DESCRIPTION PIN NAME 32-PIN 44-PIN TYPE DESCRIPTION OSCIN 24 26 I Crystal input for internal oscillator, also input for external source. OSCOUT 23 25 O Crystal oscillator output. DIGITAL INTERFACE PIN DESCRIPTION PIN NAME 32-PIN 44-PIN TYPE DESCRIPTION RESET 13 9 I Resets 73M2901/5V RXCLK 31 36 O Receive Data Synchronous Clock RXD 30 35 O Serial output to DTE. TXCLK 28 31 O Transmit Data Synchrono
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73M2901/5V Advanced Single Chip Modem ELECTRICAL SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS Operation above maximum rating may permanently damage the device. PARAMETER RATING Supply Voltage -0.5V to +7.0V Pin Input Voltage -0.5V to VPD + 0.5V Storage Temperature -55ºC to 150°C RECOMMENDED OPERATING CONDITIONS PARAMETER RATING Supply Voltage +5.0V (+/-10%) Oscillator Frequency 11.0592MHz +/- 50ppm Operating Temperature -40C to +85°C TRANSMITTER PARAMETER CONDITIONS MIN NOM MAX UNIT
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73M2901/5V Advanced Single Chip Modem ELECTRICAL SPECIFICATIONS (continued) MAXIMUM TRANSMIT LEVELS Vref=2.25V; VPA=5.0V Transmit type Maximum differential line level (dBm0) QAM -5.5 DPSK -3.4 FSK -1.2 DTMF (high tone) -6.0 DTMF (low tone) -8.0 DTMF (total) -3.9 Vref=1.25V; VPA=5.0V QAM -9.6 DPSK -7.4 FSK -5.3 DTMF (high tone) -7.9 DTMF (low tone) -9.8 DTMF (total) -5.7 Note: The recommended DAA (see the TDK 73M2901 Reference Manual) will result in approximately
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73M2901/5V Advanced Single Chip Modem ELECTRICAL SPECIFICATIONS (continued) TRANSMITTER PARAMETER CONDITIONS MIN NOM MAX UNIT Gain Adjust By step -0.3 0 0.3 dB Tolerance Transmit Gain Boost SFR 96h bit 1 (TXBOOST) = 1 4.8 5.1 5.4 dB Total Harmonic 1Khz sine wave at output (TXAP-TXAN) Distortion (THD) 1.5Vpk(2.7dBm) for Vref=1.25V -50 dB 2.4Vpk (6.8dBm) for Vref=2.25V nd rd THD = 2 and 3 harmonic. Intermod Distortion At output (TXAP-TXAN) each unwanted 1.0kHz, 1.2 kHz si
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73M2901/5V Advanced Single Chip Modem ELECTRICAL SPECIFICATIONS (continued) RECEIVER (continued) PARAMETER TEST CONDITION MIN NOM MAX UNITS Input Impedance RXA 150 --- --- kW Receive Gain SFR 96h bit 2 (Rxgain) = 1 2.7 3.0 3.3 dB Boost Maximum Input VREF=1.25V 0.587 Vpk Level at RXA VREF=2.25V 1.069 Vpk Total Harmonic 1kHz 450mV-pk on RXA -70 -50 dB Distortion (THD) nd rd THD = 2 and 3 harmonic. DC CHARACTERISTICS PARAMETER SYMBOL CONDITION MIN NOM MAX UNIT VIL -0.5
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73M2901/5V Advanced Single Chip Modem ELECTRICAL SPECIFICATIONS (continued) DC CHARACTERISTICS PARAMETER SYMBOL CONDITION MIN NOM MAX UNIT 5V Operations Maximum Power Supply IDD1 30pF/pin 51 62 mA Normal Operation @ 5V HBDEN pulled high Maximum Power Supply IDD1 30pF/pin 35 43 mA Normal Operation @ 5V HBDEN pulled low Maximum Digital Power IDDd 30pF/pin 31 37 mA Supply @ 5V Maximum Analog Power IDDah1 30pF/pin 20 25 mA supply @ 5V HBDEN pulled high Maximum Analog Power
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73M2901/5V Advanced Single Chip Modem 2 FIRMWARE FEATURES FIRMWARE DESCRIPTION An “AT” command interpreter provides command · “AT” command set and configuration of the 73M2901/5V. This provides · Supports data standards through V.22bis the user a uniform interface to control the modem in · Provides DAA control firmware (e.g. ring detect, embedded applications. hook control, line in use detection support) · Multinational Call progress support (FCC68, The signal processing is perfo
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73M2901/5V Advanced Single Chip Modem transformer directly (with the required impedance DESIGN CONSIDERATIONS matching series resistor). Used in this configuration, TDK Semiconductor’s single chip modem solutions there is loss associated in both the receive path and include all the basic modem functions. This makes transmit path. these devices adaptable to a variety of applications. The line interface circuit shown on the following Unlike digital logic circuitry, modem design
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73M2901/5V Advanced Single Chip Modem RXA R3 R4 21K 5.1K R1 T1 TXAP 475 C1 Telephone Line 0.033m TXAN Midcom 671-8005 Recommended Line Interface VCC C1 GND + C2 Y1 27PF 10uF C3 11.0592 MHZ GND R1 33PF 10K VCC GND TTL V24 signals GND U1 VCC JP1 interface 2901_P32 10 7 9 DCD To 8 8 DSR --> RS232 9 15 7 CTS VPA VPA 4 21 level shifter 6 RI VNA VNA 10 18 --> Host RTS VREF 5 32 19 C4 100nF 4 DTR VBG
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73M2901/5V Advanced Single Chip Modem TYPICAL USA APPLICATION SCHEMATICS 13
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73M2901/5V Advanced Single Chip Modem BER VS SNR BER VS RECEIVE LEVEL V.22bis V.22bis 3002A Line, 5.0V, 25C 1.00E+00 3002A Line, 5.0V, 25C 1.00E+00 1.00E-01 Answer Originate 1.00E-01 Answer Originate 1.00E-02 1.00E-02 1.00E-03 1.00E-03 1.00E-04 1.00E-04 1.00E-05 1.00E-05 1.00E-06 1.00E-06 4 8 12 16 20 24 28 32 36 40 44 10 11 12 13 14 15 16 17 18 19 Receive Level (dBm) SNR (Rx Signal/3k Hz) (dB) 14 Bit Error Rate Bit Error Rate
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73M2901/5V Advanced Single Chip Modem 32 PIN PLCC PIN-OUT PIN PIN NAME PIN PIN NAME 1 ASRCH 17 TXAP 2 RING 18 VREF 3 RELAY 19 VBG 4 RI 20 RXA 5 VND 21 VNA 6 VPD 22 VND 7 DCD 23 OSCOUT 8 DSR 24 OSCIN 9 CTS 25 VPD 10 RTS 26 VND 11 USR11 27 TXD 12 USR10 28 TXCLK 13 RESET 29 VPD 14 HBDEN 30 RXD 15 VPA 31 RXCLK 16 TXAN 32 DTR 44 PIN TQFP PIN-OUT PIN PIN NAME PIN PIN NAME PIN PIN NAME PIN PIN NAME 1 N/C 12 VPD 23 N/C 34 N/C 2 VPD 13 N/C 24 VND 35 RXD 3 DCD 14 N/C 25 OSCO
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73M2901/5V Advanced Single Chip Modem MECHANICAL DRAWINGS 32-Pin PLCC 16
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73M2901/5V Advanced Single Chip Modem MECHANICAL DRAWINGS (continued) 44-Pin TQFP (JEDEC LQFP) 17
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73M2901/5V Advanced Single Chip Modem CAUTION: Use handling procedures necessary for a PACKAGE PIN DESIGNATIONS static sensitive component. (Top View) 32-Lead PLCC 44-Pin TQFP 73M2901-32IH/5 73M2901-IGT/5 ORDERING INFORMATION PART DESCRIPTION ORDER NUMBER PACKAGING MARK 73M2901/5V 73M2901-32IH/5 73M2901-32IH 32-Pin Plastic Leaded Chip Carrier 73M2901/5V 73M2901-IGT/5 73M2901-IGT 44-Pin Thin Quad Flat Pack No responsibility is assumed by TDK Sem
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73M2901/5V Advanced Single Chip Modem August 22, 2001 Removed 5V pin callouts from package drawing. August 30, 2001 Updated Mechanical Drawing 19
