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PCF2127AT/1 bảng dữ liệu(PDF) 4 Page - NXP Semiconductors

tên linh kiện PCF2127AT/1
Giải thích chi tiết về linh kiện  Integrated RTC, TCXO and quartz crystal
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PCF2127AT/1 bảng dữ liệu(HTML) 4 Page - NXP Semiconductors

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PCF2127A_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 80
NXP Semiconductors
PCF2127A
Integrated RTC, TCXO and quartz crystal
7.
Pinning information
7.1 Pinning
7.2 Pin description
Top view. For mechanical details, see Figure 53.
Fig 2.
Pin configuration for SO20 (PCF2127A)
PCF2127A
SCL
VDD
SDI
VBAT
SDO
BBS
SDA/CE
INT
IFS
RST
TS
PFI
CLKOUT
PFO
VSS
TEST
n.c.
n.c.
n.c.
n.c.
001aaj676
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 SO20 (PCF2127A)
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 interface 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 interface
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 12
not connected; do not connect; do not use as feed through
TEST
13
do not connect; do not use as feed through
PFO
14
power fail output (open-drain; active LOW)
PFI
15
power fail input
RST
16
reset output (open-drain; active LOW)
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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