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PCF2129A Datasheet(PDF) 4 Page - NXP Semiconductors

Part # PCF2129A
Description  Integrated RTC, TCXO and quartz crystal
PDF  69 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF2129A Datasheet(HTML) 4 Page - NXP Semiconductors

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PCF2129A_2
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 02 — 7 May 2010
4 of 69
NXP Semiconductors
PCF2129A
Integrated RTC, TCXO and quartz crystal
7.
Pinning information
7.1 Pinning
7.2 Pin description
Top view. For mechanical details, see Figure 44.
Fig 2.
Pin configuration for PCF2129A (SO20)
PCF2129A
SCL
VDD
SDI
VBAT
SDO
BBS
SDA/CE
INT
IFS
n.c.
TS
n.c.
CLKOUT
n.c.
VSS
n.c.
n.c.
n.c.
n.c.
n.c.
001aaj704
1
2
3
4
5
6
7
8
9
10
12
11
14
13
16
15
18
17
20
19
Table 3.
Pin description of PCF2129A
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
timestamp input (active LOW) with 200 k
Ω internal pull-up resistor
(RPU)
CLKOUT
7
clock output (open-drain)
VSS
8
ground supply voltage
n.c.
9 to 16
not connected; do not connect; do not use as feed through
INT
17
interrupt output (open-drain; active LOW)
BBS
18
output voltage (battery backed)
VBAT
19
battery supply voltage (backup)
VDD
20
supply voltage



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