PCF8593TD NXP Semiconductors, PCF8593TD Datasheet - Page 23

• Manufacturer Part Number: PCF8593TD
• Description: Real Time Clock LO PWR CLOCK/CAL
• Manufacturer: NXP Semiconductors

Specifications of PCF8593TD

• Function: Alarm, Timer Interrupt
• Rtc Memory Size: 8 B
• Supply Voltage (max): 6 V
• Supply Voltage (min): 1 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial
• Package / Case: SOT-96
• Time Format: HH:MM:SS:hh
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PCF8593T/1,112

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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