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參數(shù)資料
| 型號： | PCF2128T |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Integrated RTC / TCXO / Crystal |
| 中文描述： | 集成RTC /溫補/水晶 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大小： | 199K |
| 代理商： | PCF2128T |
PCF2128_SDS_0
NXP B.V. 2007. All rights reserved.
Preliminary [short] data sheet
Rev. 00.03 — 4 June 2007
4 of 10
NXP Semiconductors
PCF2128
Real time clock / calendar
6.
Pinning information
6.1 Pinning
Fig 2.
Pin configuration SO20
Fig 3.
SO20 (3d)
PCF2128
SCL
V
DD
V
BAT
V
OUT
INT
SDI
SDO
SDA/CE
IFS
RST
TS
PFI
CLKOUT
PFO
V
SS
n.c.
TEST
n.c.
n.c.
n.c.
001aag060
1
2
3
4
5
6
7
8
9
10
12
11
14
13
16
15
18
17
20
19
001aag576
die
oscillator
Table 3:
Symbol
SCL
Pin description PCF2128
Pin
Description
1
combined serial clock input for both I
2
C
and SPI interface. May float when CE
inactive.
2
serial data input for SPI interface. May
float when CE inactive.
3
serial data output for SPI interface,
push-pull
4
combined serial data input / output for the
I
2
C interface and chip enable input (active
LOW) for the SPI interface.
5
interface selector input
connect to ground to select the SPI
interface
connect to V
OUT
(pin 18) to select the
I
2
C interface
6
timestamp input (active LOW) with 200 k
Ω
internal pull-up resistor
7
clock output (open drain)
Symbol
V
DD
Pin
20
Description
positive supply voltage
SDI
V
BAT
19
battery backup supply voltage
SDO
V
OUT
18
battery backed output voltage
SDA / CE
INT
17
interrupt output (open-drain; active
LOW)
IFS
RST
16
reset output (open drain; active LOW)
TS
PFI
15
power fail input
CLKOUT
PFO
14
power fail output (open drain; active
LOW)
Do not connect and do not use as feed
through.
Do not connect and do not use as feed
through.
Do not connect and do not use as feed
through.
V
SS
8
ground
TEST
13
nc
9
Do not connect and do not use as feed
through.
Do not connect and do not use as feed
through.
nc
12
nc
10
nc
11
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