NXP Semiconductors | UM10301 | |
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| User Manual PCF85x3, PCA8565 and PCF2123, PCA2125 |
Table 2. Comparison of six real time clocks |
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Features
Unique features
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| PCx85x3 family |
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| PCx212x family | ||||
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| PCF8563 |
| PCA8565 |
| PCF8583 |
| PCF8593 |
| PCF2123 |
| PCA2125 |
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| Very low |
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| High |
| High |
| Extremely |
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| power |
| automotive |
| resolution, |
| resolution, |
| low power |
| automotive |
| consumption |
| qualification |
| RAM, event |
| event |
| consumption, |
| qualification |
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| counter |
| counter |
| electronic |
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| tuning |
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Type of interface | I2C | I2C | I2C | I2C | SPI | SPI |
Interface bus speed | 400 kHz | 400 kHz | 100 kHz | 100 kHz | 7 MHz | 7 MHz |
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Scratch pad RAM | no | no | 240 bytes | no | no | no |
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Year / leap year tracking | yes / yes | yes / yes | yes / yes | yes / yes | yes / yes | yes / yes |
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Year counter | 2 digit + | 2 digit + | 2 bit | 2 bit | 2 digit | 2 digit |
| 1 century bit | 1 century bit | (4 years) | (4 years) | (99 years) | (99 years) |
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100 ms, 10 ms time register | no | no | yes | yes | no | no |
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Electronic tuning register | no | no | no | no | yes | no |
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Programmable alarm and timer | yes | yes | yes | yes | yes | yes |
functions |
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Low voltage detector | yes | yes | no | no | yes | no |
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Event counter mode | no | no | yes | yes | no | no |
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Option to select between two I2C | no | no | yes | no | no | no |
addresses |
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Integrated oscillator capacitor | 1 at OSCO | 1 at OSCO | 1 at OSCO | 1 at OSCO | 2 | 1 at OSCO |
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Supply voltage range | 1.8 V – 5.5 V | 1.8 V – 5.5 V | 2.5 V – 6.0 V | 2.5 V – 6.0 V | 1.6 V – 5.5 V | 1.6 V – 5.5 V |
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Clock operating voltage | 1.0 V – 5.5 V | 1.8 V – 5.5 V | 1.0 V – 6.0 V | 1.0 V – 6.0 V | 1.1 V – 5.5 V | 1.3 V – 5.5 V |
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Typical current consumption | 250 nA at | 650 nA at | 2 μA at | 1 μA at | 100 nA at | 550 nA at |
| VDD = 1 V | VDD = 3 V | VDD = 1 V | VDD = 2 V | VDD = 2 V | VDD = 3 V |
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Operating temperature range | ||||||
| +85 °C | +125 °C | +85 °C | +85 °C | +85 °C | +125 °C |
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no | Yes | no | no | no | yes | |
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| (TSSOP8) |
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Packages | U [1], DIP8, | TSSOP8, | U [1], DIP8, | DIP8, SO8 | U [1], | TSSOP14 |
| SO8, | HVSON10 | SO8, |
| HVQFN16, |
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| TSSOP8, |
| HVQFN20 |
| TSSOP14 |
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| HVSON10 |
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[1]Naked die
Some derived versions are available such as PCF8563A and PCA8565A which include two integrated oscillator capacitors and are also available as naked die.
UM10301_1 |
| © NXP B.V. 2008. All rights reserved. |
User manual | Rev. 01 — 23 December 2008 | 7 of 52 |