TXC101 RFM, TXC101 Datasheet
TXC101
Specifications of TXC101
Available stocks
Related parts for TXC101
TXC101 Summary of contents
Page 1
... Its small size with low power consumption makes it ideal for various short range radio applications. The TXC101 is a dual mode solution. In the Microcontroller mode, a generic 10MHz crystal and a low-cost microcontroller are the only requirements to create a complete Transmitter link. ...
Page 2
... Table of Contents Table of Contents........................................................................................................................ 2 1.0 Pin Descriptions ...................................................................................................................... 3 1.1 Processor Mode Pin Configuration ............................................................................... 3 1.2 EEPROM Mode Pin Configuration ................................................................................. 4 2.0 Functional Description ......................................................................................................... 5 2.1 TXC101 Processor Mode Application ........................................................................... 5 RF Transmitter Matching................................................................................................... 5 Antenna Design Considerations........................................................................................ 6 PCB Layout Considerations .............................................................................................. 6 2.2 EEPROM Mode Application............................................................................................ 8 3.0 TXC101 Functional Characteristics................................................................................... 11 Output Amplifier ...
Page 3
... Interrupt Request – Interrupt Request Output and Status Register Data Read Output. 14 nIRQ Supply Voltage 15 VDD Modulation Input – Serial data input for FSK or OOK modulation 16 MOD 1.1 Processor Mode Pin Configuration www.RFM.com Email: info@rfm.com ©by RF Monolithics, Inc. Processor Mode The circuit Page TXC101 - 4/8/08 ...
Page 4
... The voltage level is programmable through the Battery Detect 14 nBD Threshold Register. Supply Voltage 15 VDD Not used. Tie to VDD or GND 16 NC 1.2 EEPROM Mode Pin Configuration www.RFM.com Email: info@rfm.com ©by RF Monolithics, Inc. EEPROM Mode The circuit Page TXC101 - 4/8/08 ...
Page 5
... Functional Description The TXC101 is a low power, frequency agile, multi-channel OOK/FSK transmitter for use in the 315, 433, 868, and 916 MHz bands. All RF transmit functions are completely integrated requiring only a single 10MHz crystal as a reference source. The TXC101 has two modes of operation: EEPROM mode and Processor mode ...
Page 6
... Ref Des Antenna Design Considerations The TXC101 was designed to drive a differential output such as a Dipole or a Loop antenna. A loop antenna is recommended for applications where size is critical. The dipole is typically not an attractive option for compact designs based on its inherent size at resonance and distance needed away from a ground plane efficient radiating antenna ...
Page 7
... Email: info@rfm.com ©by RF Monolithics, Inc. Top Bottom Top Assembly Page TXC101 - 4/8/08 ...
Page 8
... EEPROM Mode Figure 2. Typical EEPROM Mode Application Circuit for 50 Ohm Load The TXC101 can operate from a single, SPI compatible EEPROM by simply reading the sequential codes stored in memory. No external microcontroller is required. The codes are read out and processed as command and data. In this special mode, four pins are configured as inputs with an internal pull-up resistor. All that is needed are external key switches connected to GND to activate that key’ ...
Page 9
... EEPROM Address Entry 0000h 0080h 0100h 0180h 0200h 0280h 0300h Crystal– Synthesizer – Power Amplifier auto on/off mode enable Continuous execution for all keys DR=10M/29/(35+1)~9600 bps Power down after 64h (100) clocks the EEPROM Address Description Page TXC101 - 4/8/08 ...
Page 10
... Address Command Data 180–181 8 872 182–183 A 610 184–185 C6 60 186–1E5 96xAAh 1E6–1E7 C4 00 3.0 TXC101 Functional Characteristics www.RFM.com Email: info@rfm.com ©by RF Monolithics, Inc ...
Page 11
... Transmit Register The transmit register is configured as two 8-bit shift registers connected in series to form a single 16-bit shift register. This register is a master when in EEPROM Mode. The TXC101 generates the chip select and clock to read the EEPROM contents into the register. For Microcontroller Mode, this register is not available. Data may be applied in two ways: directly to the FSK MOD pin (16) after enabling the oscillator, synthesizer, and power amplifier, or directly to the SDI pin following the clock timing on page 19 of the Transmit Command Register ...
Page 12
... SPI bus. Typical SPI devices are configured for byte write operations. The TXC101 uses word writes and hence the nCS (Pin 3) should be pulled low for 16 bits. All SPI data is written to the TXC101 MSB first. The maximum SCK for the SPI bus is 20 MHz. ...
Page 13
... Email: info@rfm.com ©by RF Monolithics, Inc. TABLE 4. Figure 4. Timing Diagram Page TXC101 - 4/8/08 ...
Page 14
... LBD3 LBD2 TX0 OSCEN SYNEN PAEN LBDEN WKUPEN CLKEN C000h POR Bit Bit Value DEV1 DEV0 8080h PWR1 PWR0 XXB0h Freq1 Freq0 A7DOh BITR1 BITR0 C800h SW1 PUPDIS CA00h SLP1 SLP0 C400h MUL1 MUL0 E000h LBD1 LBD0 C200h Page TXC101 - 4/8/08 ...
Page 15
... TABLE 7. Output Clock CLK2 CLK1 Frequency (MHz TABLE 8. CAP2 CAP1 CAP0 Crystal Load Capacitance 8 9 …… …… 15 =8.5pF + (CAP[3..0] * 0.5pF) L Bit Bit Bit Bit Bit CAP0 MODP DEV2 DEV1 CLK0 Page TXC101 - 4/8/08 Bit 0 DEV0 ...
Page 16
... PWR0 TABLE 10. PWR2 PWR1 Max 0 0 -3dB 0 0 -6dB 0 1 -9dB 0 1 -12dB 1 0 -15dB 1 0 -18dB 1 1 -21dB 1 1 [POR=C600h] Bit Bit Bit Bit Bit Bit Bit Bit DEV0 PWR0 Bit Bit Bit Bit Bit Page TXC101 - 4/8/08 Bit 0 B0 ...
Page 17
... Email: info@rfm.com ©by RF Monolithics, Inc. Figure 6. Data Transmit through SDI pin Figure 7. Data Transmit through FSK pin [POR=A7D0h] Bit Bit Bit Bit Freq9 Freq8 Freq7 Freq6 Freq5 Bit Bit Bit Bit Bit Freq4 Freq3 Freq2 Freq1 Page TXC101 - 4/8/08 Bit 0 Freq0 ...
Page 18
... MHz 3 30 [EEPROM Mode ONLY] Bit Bit Bit Bit Bit BITR7 BITR6 BITR5 DRexp(kbps) = 10000 / [29 * (BITR[7..0]+1)] BITR[7..0] = (10000 / [ exp , use Table 11 and the following equation: Bit Bit Bit Bit BITR4 BITR3 BITR2 BITR1 BITR0 Page TXC101 - 4/8/08 Bit 0 ...
Page 19
... NONE [POR=C400h] Bit Bit Bit Bit Bit SLP7 SLP6 Bit Bit Bit Bit Bit DB0 SW4 SW3 SW2 SW1 Bit Bit Bit Bit Bit SLP5 SLP4 SLP3 SLP2 SLP1 Page TXC101 - 4/8/08 Bit 0 PUPDIS Bit 0 SLP0 ...
Page 20
... R3 R2 The Wake-up Timer Period register sets the wake-up interval for the TXC101. After setting the wake-up interval, the WKUPEN (bit 1 of Power Management Register) should be cleared and set at the end of every wake-up cycle. To calculate the wake-up interval desired, use the following MUL[7 ...
Page 21
... Email: info@rfm.com ©by RF Monolithics, Inc. [POR=C000h] Bit Bit Bit Bit Bit TX1 TX0 OSCEN SYNEN Function TX1 Bit Bit Bit Bit PAEN LBDEN WKUPEN CLKEN TX0 Page TXC101 - 4/8/08 0 ...
Page 22
... Band 12 433MHz Band mA 14 868MHz Band 15 916MHz Band µA All blocks disabled Oscillator and baseband mA enabled µA µA Programmable in 0.1 V 5.3 V steps mV V 0.3*Vdd V 1 µA Vil = µA Vih = Vdd, Vdd = 5.4 V 0.4 V Iol = Ioh = - Load = 15 pF Page TXC101 - 4/8/ ...
Page 23
... Band 433MHz Band 868MHz Band 916MHz Band 100 kHz from carrier dBc/Hz 1 MHz from carrier kbps ΔFSK = 210kHz kbps Programmable in 30 kHz kHz steps Unit Test Conditions ms Vdd at 90% of final value ms Calibrated every 30 seconds ms Unit Test Conditions Page TXC101 - 4/8/08 ...
Page 24
... Voltage (V) within 1kHz settle, 10MHz step Crystal running Programmable in 0.5 pF steps, tolerance +/- 10% Crystal ESR < 100 315MHz Band (2.5kHz steps) 433MHz Band (2.5kHz steps) 868MHz Band (5.0kHz steps) 916MHz Band (7.5kHz steps) 915MHz 868MHz 5.4V Page TXC101 - 4/8/08 ...
Page 25
... Email: info@rfm.com ©by RF Monolithics, Inc. Output Power vs Voltage 3.0V Voltage (V) 315MHz 433MHz 868MHz 915MHz 5.4V Page TXC101 - 4/8/08 ...
Page 26
... IPC/JEDEC J-STD-020C REFLOW PROFILE www.RFM.com Email: info@rfm.com ©by RF Monolithics, Inc. Page TXC101 - 4/8/08 ...
Page 27
... BSC. 0.19 0.30 0.007 0.65 BSC. 0.026 BSC. 0.80 0.90 1.05 0.031 0.035 1.20 0.50 0.60 0.75 0.020 0.024 1.00 REF. 0.39 REF 0.09 0.004 0.09 0.004 REF. 12 REF. 12 REF. 12 REF. Page TXC101 - 4/8/08 Max 0.177 0.201 0.012 0.041 0.47 0.030 8 ...