PCF2129AT/2,518 NXP Semiconductors, PCF2129AT/2,518 Datasheet - Page 4

• Manufacturer Part Number: PCF2129AT/2,518
• Description: Real Time Clock
• Manufacturer: NXP Semiconductors
• Series: PCF2129r

Specifications of PCF2129AT/2,518

• Rohs: yes
• Function: Clock, Calendar, Alarm, Watchdog, Timestamp
• Rtc Bus Interface: I2C, SPI
• Date Format: Binary
• Time Format: Binary
• Supply Voltage - Max: 4.2 V
• Supply Voltage - Min: 1.2 V
• Maximum Operating Temperature: + 60 C
• Minimum Operating Temperature: - 15 C
• Mounting Style: SMD/SMT
• Package / Case: SOP-20
• Battery Backup Switching: Yes
• Factory Pack Quantity: 2000

NXP Semiconductors
7. Pinning information
PCF2129AT
Product data sheet
7.1 Pinning
7.2 Pin description
Table 4.
Symbol
SCL
SDO
SDA/CE
IFS
CLKOUT
V
n.c.
INT
V
SDI
TS
BBS
V
Fig 2.
SS
BAT
DD
Top view. For mechanical details, see
Pin configuration for PCF2129AT (SO20)
Pin description of PCF2129AT
All information provided in this document is subject to legal disclaimers.
Pin
1
2
3
4
5
6
7
8
9 to 16
17
18
19
20
Rev. 5 — 12 February 2013
CLKOUT
SDA/CE
Description
combined serial clock input for both I
float when SDA/CE inactive
serial data input for SPI-bus; may float when SDA/CE inactive
serial data output for SPI-bus, push-pull
combined serial data input and output for the I
enable input (active LOW) for the SPI-bus
interface selector input
timestamp input (active LOW) with 200 k internal pull-up resistor
(R
clock output (open-drain)
ground supply voltage
not connected; do not connect; do not use as feed through
interrupt output (open-drain; active LOW)
output voltage (battery backed)
battery supply voltage (backup)
supply voltage
connect to pin V
connect to pin BBS to select the I
connect to V
SDO
PU
SCL
V
SDI
IFS
n.c.
n.c.
TS
SS
)
10
1
2
3
4
5
6
7
8
9
Figure
PCF2129AT
SS
if battery switch over is not used
SS
44.
Integrated RTC, TCXO and quartz crystal
001aaj704
to select the SPI-bus
20
19
18
17
16
15
14
13
12
11
V
V
BBS
INT
n.c.
n.c.
n.c.
n.c.
n.c.
n.c.
DD
BAT
2
C-bus
2
C-bus and SPI-bus; may
PCF2129AT
2
© NXP B.V. 2013. All rights reserved.
C-bus and chip
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