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MC33897AD/R2 Datasheet(PDF) 16 Page - Freescale Semiconductor, Inc |
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MC33897AD/R2 Datasheet(HTML) 16 Page - Freescale Semiconductor, Inc |
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16 / 20 page ![]() Analog Integrated Circuit Device Data 16 Freescale Semiconductor 33897/A/B/C/D/T TYPICAL APPLICATIONS TYPICAL APPLICATIONS The 33897/A/C/T can be used in applications where the module includes a regulator that has the capability of going into Sleep mode by having an Enable terminal. See Figure 9. When the module’s regulator is in sleep mode, the module is turned off. The module waits for a defined wake-up voltage level on the bus. This wake-up voltage will activate the control line, which enables the regulator and turns the module back on. This 33897/A/C/T feature allows the module to be more energy efficient since the current consumption is significantly lowered when it goes into sleep mode. Figure 9. 33897/A/C/T Typical Application Schematic The 33897B/D do not have a control terminal to enable the module’s regulator. See Figure 10. The 33897B/D can be used in applications where board space is limited and there is no need for the module to have control over its regulator via the transceiver. Figure 10. 33897B/D Typical Application Schematic GND CNTL VBATT LOAD BUS RXD MODE0 TXD Voltage Regulator 33897/A/C/T EN VCC MCU 10 k Ω 2.7 k Ω 6.49 k Ω 1.0 k Ω Battery 47 µH SWC BUS VCC Power MODE1 47 pF 100 pF Source 4.7 µF 4 100 nF GND VBATT LOAD BUS RXD MODE0 TXD 33897B/D VCC MCU 10 k Ω 2.7 k Ω 6.49 k Ω 1.0 k Ω Battery 47 µH SWC BUS VCC MODE1 47 pF 100 nF 100 pF 4.7 µF |
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