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| DECT Transmitter PMB 2220 General Description The PMB 2220 is a high speed analog bipolar IC and is one of the Siemens chipset for the Digital European Cordless Telephone. Combined with PLL (i.e. PMB 2306) and a power amplifier, the PMB 2220 device performs a complete DECT transmitter. Additionally the phase locked loop can be switched to receive mode and be used as a local oscillator for the receiver mixer of PMB 2420. Type PMB 2220-S Features Package P-SSOP-24-1 (Shrink, SMD) * Either single VCO operation (for receive and transmit) or dual VCO operation (one for receive and one for transmit) possible * 64/65-prescaler on chip * Frequency doubler for receive and transmit mode with balanced driver outputs * Supply voltage regulator (with external pnp-transistor) for the two VCO's * Power-down for the inactive VCO * Current reference output for PLL charge pump to get constant lock-in time * Wide power supple range 3.0 ... 5.5 V F1 20 I REF 19 GND3 18 LOB1 17 LOE1 16 LOE2 15 LOB2 14 V CC3 13 I REG 12 Voltage Regulator V REF 11 VCO 1 (Rx / Tx) VCO 2 (Rx) Processor 1/64/65 Bandgap reference, PD charge pump reference, VCO-power decoder 90 1 MCC 2 GND1 3 4 5 PA 6 PA 7 8 GND2 9 10 ITB05958 V CC1 PSRUN V CC2 TXON TXLOFF Block Diagram Siemens Aktiengesellschaft 1 |
Price & Availability of PMB2220
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