參數(shù)資料
型號(hào)： PCF2128
廠商： NXP Semiconductors N.V.
英文描述： Integrated RTC / TCXO / Crystal
中文描述： 集成RTC /溫補(bǔ)/水晶
文件頁(yè)數(shù)： 5/10頁(yè)
文件大小： 199K
代理商： PCF2128
PCF2128_SDS_0
NXP B.V. 2007. All rights reserved.
Preliminary [short] data sheet
Rev. 00.03 — 4 June 2007
5 of 10
NXP Semiconductors
PCF2128
Real time clock / calendar
7.
Limiting values
Table 4:
Symbol
V
DD
V
BAT
7.1 ESD values
ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per
JESD22-A115 and 2000 V CDM per JESD22-C101.
Latch-up testing is done to JEDEC standard JESD78 which exceeds 100 mA.
8.
Application information
The PCF2128 is a ready to run real time clock; no external quartz is required.
You can set different configurations in your application depending on the PCF2128
functions you want to use.
The integration of the quartz crystal in the same package as the RTC has the
following advantages:
–
elimination of crystal procurement issues
–
elimination of RTC frequency tuning
–
no more crystal PCB layout issues.
You can select the SPI or I
2
C-bus interface using the IFS pin.
By connecting a battery to V
BAT
an uninterruptible power supply is guaranteed.
You can use the battery backed voltage V
OUT
to supply an external RAM to retain
RAM data in battery backup mode.
You can connect PFI through an external voltage divider to V
DD
to allow extra power
fail detection. If not used, connect PFI to V
SS
.
You can connect the timestamp input pin TS to a push button for tamper detection.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Parameter
Conditions
supply voltage
backup battery supply
voltage
supply current
input voltage
output voltage
input current
output current
total power dissipation
ambient temperature
storage temperature
Min
0.5
0.5
Max
+
6.5
+
6.5
Unit
V
V
I
DD
V
I
V
O
I
I
I
O
P
tot
T
amb
T
stg
50
0.5
0.5
10
10
-
40
65
+50
+6.5
+6.5
+10
+10
300
+
85
+150
mA
V
V
mA
mA
mW
°
C
°
C
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