PCF8583T NXP Semiconductors, PCF8583T Datasheet - Page 24

• Manufacturer Part Number: PCF8583T
• Manufacturer: NXP Semiconductors

Specifications of PCF8583T

• Bus Type: Serial (2-Wire, I2C)
• Operating Supply Voltage (typ): 3.3/5V
• Package Type: SO
• Operating Supply Voltage (max): 6V
• Operating Supply Voltage (min): 2.5V
• Operating Temperature Classification: Industrial
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Pin Count: 8
• Mounting: Surface Mount
• Date Format: DW:DM:M:Y
• Time Format: HH:MM:SS:hh
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
11. Application information
PCF8583
Product data sheet
11.1.1 Method 1: Fixed OSCI capacitor
11.1.2 Method 2: OSCI trimmer
11.1.3 Method 3: Direct measurement
11.1 Quartz frequency adjustment
By evaluating the average capacitance necessary for the application layout, a fixed
capacitor can be used. The frequency is measured using the 1 Hz signal available after
power-on at the interrupt output (pin 7). The frequency tolerance depends on the quartz
crystal tolerance, the capacitor tolerance and the device-to-device tolerance. Average
deviations of ±5 minutes per year are possible.
Using the alarm function (via the I
interrupt output for fast setting of a trimmer.
Procedure:
Routine:
Direct measurement of oscillator output (allowing for test probe capacitance).
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Power the device on
Initialize the device (alarm functions).
Set clock to time t and set alarm to time t + Δt
at time t + Δt (interrupt) repeat routine.
All information provided in this document is subject to legal disclaimers.
Rev. 06 — 6 October 2010
2
C-bus) a signal faster than the 1 Hz is generated at the
Clock and calendar with 240 x 8-bit RAM
PCF8583
© NXP B.V. 2010. All rights reserved.
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