PCF2129T 데이터 시트보기 (PDF) - NXP Semiconductors.

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PCF2129T

Accurate RTC with integrated quartz crystal for industrial

NXP Semiconductors. 

NXP Semiconductors

7. Pinning information

7.1 Pinning

PCF2129T

Accurate RTC with integrated quartz crystal for industrial

SCL 1

SDI 2

SDO 3

SDA/CE 4

IFS 5

TS 6

CLKOUT 7

VSS 8

PCF2129T

16 VDD

15 VBAT

14 BBS

13 INT

12 n.c.

11 n.c.

10 n.c.

9 n.c.

013aaa567

Top view. For mechanical details, see Figure 44.

Fig 2. Pin configuration for PCF2129T (SO16)

7.2 Pin description

Table 4. Pin description of PCF2129T

Symbol

Pin

Description

SCL

1

combined serial clock input for both I2C-bus and SPI-bus; may

float when SDA/CE inactive

SDI

2

serial data input for SPI-bus; may float when SDA/CE inactive

SDO

3

serial data output for SPI-bus, push-pull

SDA/CE

4

combined serial data input and output for the I2C-bus and chip

enable input (active LOW) for the SPI-bus

IFS

5

interface selector input

connect to pin VSS to select the SPI-bus

connect to pin BBS to select the I2C-bus

TS

6

CLKOUT

7

timestamp input (active LOW) with 200 k internal pull-up resistor

(RPU)

clock output (open-drain)

VSS

8

ground supply voltage

n.c.

9 to 12 not connected; do not connect; do not use as feed through

INT

13

interrupt output (open-drain; active LOW)

BBS

14

output voltage (battery backed)

VBAT

VDD

15

battery supply voltage (backup)

connect to VSS if battery switch over is not used

16

supply voltage

PCF2129T

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 3 — 12 February 2013

© NXP B.V. 2013. All rights reserved.

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