PCF2127AT/1,518 NXP Semiconductors, PCF2127AT/1,518 Datasheet - Page 19

• Manufacturer Part Number: PCF2127AT/1,518
• Description: IC RTC/CALENDAR TCXO QTZ 20SOIC
• Manufacturer: NXP Semiconductors
• Type: Clock/Calendar/Alarmr

Specifications of PCF2127AT/1,518

• Package / Case: 20-SOIC (0.300", 7.50mm Width)
• Time Format: HH:MM:SS (12/24 hr)
• Memory Size: 512B
• Date Format: YY-MM-DD-dd
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.8 V ~ 4.2 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Function: Serial Clock, Timestamp, Timekeeper, Watchdog, Alarm, Calendar, Timer, Timer Interrupt
• Rtc Memory Size: 512 bytes
• Supply Voltage (max): 4.2 V
• Supply Voltage (min): 1.8 V
• Mounting Style: SMD/SMT
• Rtc Bus Interface: I2C
• Supply Current: 2600 nA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
PCF2127A_2
Product data sheet
8.6.1.2 Direct switching mode
If V
If V
Fig 4.
Fig 5.
V
V
DD
DD
DD
DD
V
V
(= 2.5 V)
(= 2.5 V)
th(sw)bat
th(sw)bat
(= 0 V)
(= 0 V)
> V
< V
V
V
V
V
INT
INT
BAT
BAT
BF
BF
DD
DD
Battery switch-over behavior in standard mode with bit BIE set logic 1 (enabled)
Battery switch-over behavior in direct switching mode with bit BIE set logic 1
(enabled)
BAT
BAT
backup battery operation
backup battery operation
the internal power supply is V
the internal power supply is V
All information provided in this document is subject to legal disclaimers.
V
V
BBS
BBS
Rev. 02 — 7 May 2010
internal power supply (= V
internal power supply (= V
DD
BAT
Integrated RTC, TCXO and quartz crystal
.
.
BBS
BBS
)
)
PCF2127A
cleared via interface
cleared via interface
© NXP B.V. 2010. All rights reserved.
001aaj311
001aaj312
V
V
19 of 80
BBS
BBS