M41T60 Datasheet, PDF (1/23 Pages) STMicroelectronics – Serial Access Real-Time Clock

M41T60
Serial Access Real-Time Clock
FEATURES SUMMARY
■ 350nA TIMEKEEPING CURRENT @ 3V
■ TIMEKEEPING DOWN TO 1.0V
■ 1.3V TO 3.6V I²C BUS OPERATING
VOLTAGE
■ COUNTERS FOR SECONDS, MINUTES,
HOURS, DAY, DATE, MONTH, YEARS, AND
CENTURY
■ SERIAL INTERFACE SUPPORTS I²C BUS
(400kHz)
■ SOFTWARE CLOCK CALIBRATION
■ LOW OPERATING CURRENT OF 35µA
■ OSCILLATOR STOP DETECTION
■ AUTOMATIC LEAP YEAR COMPENSATION
■ SOFTWARE PROGRAMMABLE OUTPUT
(OUT)
■ OPERATING TEMPERATURE OF –40 TO
85°C
■ LEAD-FREE 16-PIN QFN PACKAGE
■ TOTAL SURFACE AREA OF IC AND 32KHz
CRYSTAL IS 21.5mm²
Figure 1. Package
QFN16 (Q)
Figure 2. 32KHz Crystal + QFN16 vs. VSOJ20
VSOJ20 (47.6mm2)
GND Plane _{Guard Ring} ^(21.5mm2)
SMT
CRYSTAL
1 XI
2 XO
3
4 ST QFN16
AI11107
Figure 3. 16-pin QFN Connections
Note: 1. Open Drain Output.
16 15 14 13
XI 1
12 NC
XO 2
11 _OFIRQ/OUT⁽¹⁾
V_SS 3
10 SCL
FT^{(1) 4}
9 SDA
5678
AI08870
May 2005
1/23