PCF8593T NXP Semiconductors, PCF8593T Datasheet - Page 23

• Manufacturer Part Number: PCF8593T
• Manufacturer: NXP Semiconductors

Specifications of PCF8593T

• Bus Type: Serial (I2C)
• User Ram: 8Byte
• Package Type: SO
• Operating Supply Voltage (max): 6V
• 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
PCF8593
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 Oscillator frequency adjustment
By evaluating the average capacitance necessary for the application layout a fixed
capacitor can be used. The frequency is best measured via the 1 Hz signal which can be
programmed to occur at the interrupt output (pin 7). The frequency tolerance depends on
the quartz crystal tolerance, the capacitor tolerance and the device-to-device tolerance
(on average ±5 × 10
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).
•
•
•
•
Power the device on
Apply RESET.
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.
−
6). Average deviations of ±5 minutes per year can be achieved.
Rev. 04 — 6 October 2010
2
C-bus) a signal faster than the 1 Hz is generated at the
Low power clock and calendar
PCF8593
© NXP B.V. 2010. All rights reserved.
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