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PCF2128T View Datasheet(PDF) - Philips Electronics

Part Name
Description
MFG CO.
PCF2128T
Philips
Philips Electronics Philips
'PCF2128T' PDF : 10 Pages View PDF
1 2 3 4 5 6 7 8 9 10
NXP Semiconductors
PCF2128
Real time clock / calendar
7. Limiting values
Table 4:
Symbol
VDD
VBAT
IDD
VI
VO
II
IO
Ptot
Tamb
Tstg
Limiting valuesIn accordance with the Absolute Maximum Rating System (IEC 60134).
Parameter
Conditions
Min
Max Unit
supply voltage
0.5 +6.5 V
backup battery supply
voltage
0.5 +6.5 V
supply current
50
+50
mA
input voltage
0.5 +6.5 V
output voltage
0.5 +6.5 V
input current
10
+10
mA
output current
10
+10
mA
total power dissipation
-
300
mW
ambient temperature
40
+85
°C
storage temperature
65
+150 °C
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 I2C-bus interface using the IFS pin.
By connecting a battery to VBAT an uninterruptible power supply is guaranteed.
You can use the battery backed voltage VOUT to supply an external RAM to retain
RAM data in battery backup mode.
You can connect PFI through an external voltage divider to VDD to allow extra power
fail detection. If not used, connect PFI to VSS.
You can connect the timestamp input pin TS to a push button for tamper detection.
PCF2128_SDS_0
Preliminary [short] data sheet
Rev. 00.03 — 4 June 2007
© NXP B.V. 2007. All rights reserved.
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