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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PCF2129AT 데이터시트(PDF) 5 Page - NXP Semiconductors |
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PCF2129AT 데이터시트(HTML) 5 Page - NXP Semiconductors |
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5 / 86 page  PCF2129 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved. Product data sheet Rev. 7 — 19 December 2014 5 of 86 NXP Semiconductors PCF2129 Accurate RTC with integrated quartz crystal for industrial applications After lead forming and cutting, there remain stubs from the package assembly process. These stubs are present at the edge of the package as illustrated in Figure 4. The stubs are at an electrical potential. To avoid malfunction of the PCF2129, it has to be ensured that they are not shorted with another electrical potential (e.g. by condensation). 7.2 Pin description Table 4. Pin description of PCF2129 Input or input/output pins must always be at a defined level (VSS or VDD) unless otherwise specified. Symbol Pin Description PCF2129AT PCF2129T SCL 1 1 combined serial clock input for both I2C-bus and SPI-bus SDI 2 2 serial data input for SPI-bus connect to pin VSS if I2C-bus is selected SDO 3 3 serial data output for SPI-bus, push-pull SDA/CE 4 4 combined serial data input and output for the I2C-bus and chip enable input (active LOW) for the SPI-bus IFS 5 5 interface selector input connect to pin VSS to select the SPI-bus connect to pin BBS to select the I2C-bus TS 6 6 timestamp input (active LOW) with 200 k internal pull-up resistor (RPU) CLKOUT 7 7 clock output (open-drain) VSS 8 8 ground supply voltage n.c. 9 to 16 9 to 12 not connected; do not connect; do not use as feed through INT 17 13 interrupt output (open-drain; active LOW) BBS 18 14 output voltage (battery backed) VBAT 19 15 battery supply voltage (backup) connect to VSS if battery switch over is not used VDD 20 16 supply voltage |
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