24LC21A/P
Active128 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8, 0.300 INCH, PLASTIC, DIP-8
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24LC21A/P
Active128 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8, 0.300 INCH, PLASTIC, DIP-8
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Technical Specifications
Parameters and characteristics commom to parts in this series
| Specification | 24LC21A/P | 24LC21 Series |
|---|---|---|
| Access Time | 900 ns | 900 ns |
| Clock Frequency | 400 kHz | 400 kHz |
| Memory Format | EEPROM | EEPROM |
| Memory Interface | I2C | I2C |
| Memory Organization | 128 | 128 |
| Memory Size | 1 Kbit | 1 Kbit |
| Memory Type | Non-Volatile | Non-Volatile |
| Mounting Type | Through Hole | Through Hole, Surface Mount |
| Operating Temperature [Max] | 70 °C | 70 - 85 °C |
| Operating Temperature [Min] | 0 °C | -40 - 0 °C |
| Package / Case | 8-DIP | 8-DIP, 8-SOIC |
| Package / Case | 0.3 in | 0.3 - 3.9 in |
| Package / Case | 7.62 mm | 7.62 mm |
| Supplier Device Package | 8-PDIP | 8-PDIP, 8-SOIC |
| Technology | EEPROM | EEPROM |
| Voltage - Supply [Max] | 5.5 V | 5.5 V |
| Voltage - Supply [Min] | 2.5 V | 2.5 V |
| Write Cycle Time - Word, Page | 10 ms | 10 ms |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Avnet Americas | Tube | 660 | $ 0.57 | |
| 780 | $ 0.57 | |||
| 1440 | $ 0.48 | |||
| 3300 | $ 0.48 | |||
| 6600 | $ 0.47 | |||
| DigiKey | Tube | 660 | $ 0.60 | |
| Digikey | Tube | 660 | $ 0.60 | |
| Future Electronics | N/A | 660 | $ 0.50 | |
| 900 | $ 0.50 | |||
| 1200 | $ 0.49 | |||
| 1500 | $ 0.49 | |||
| Master Electronics | N/A | 60 | $ 0.58 | |
| 300 | $ 0.53 | |||
| 1020 | $ 0.53 | |||
| 2520 | $ 0.50 | |||
| 5040 | $ 0.49 | |||
| 7500 | $ 0.48 | |||
| 10020 | $ 0.47 | |||
| 15000 | $ 0.47 | |||
| Mouser Electronics | N/A | 1 | $ 0.61 | |
| 25 | $ 0.60 | |||
| 120 | $ 0.58 | |||
| NAC | Tube | 1 | $ 0.60 | |
| 100 | $ 0.54 | |||
| 500 | $ 0.50 | |||
| 1000 | $ 0.49 | |||
| Newark | Bulk | 100 | $ 0.61 | |
| Onlinecomponents.com | N/A | 60 | $ 0.58 | |
| 300 | $ 0.53 | |||
| 1020 | $ 0.53 | |||
| 2520 | $ 0.50 | |||
| 5040 | $ 0.49 | |||
| 7500 | $ 0.48 | |||
| 10020 | $ 0.47 | |||
| 15000 | $ 0.47 | |||
| Quest Components | N/A | 1 | $ 1.90 | |
| 1 | $ 3.09 | |||
| 54 | $ 0.95 | |||
| 211 | $ 0.76 | |||
| RS | Bulk | 660 | $ 0.99 | |
| 6600 | $ 0.94 | |||
| 33000 | $ 0.90 | |||
| 66000 | $ 0.85 | |||
| Win Source Electronics | N/A | 2 | $ 48.04 | |
| 3 | $ 39.42 | |||
| 4 | $ 38.19 | |||
| 6 | $ 36.96 | |||
| 7 | $ 35.73 | |||
| 10 | $ 32.03 | |||
24LC21 Series
1Kb I2C Serial EEPROM for DDC1™/DDC2™ Monitor Identification
| Part | Write Cycle Time - Word, Page | Memory Organization | Memory Size | Package / Case | Package / Case | Package / Case | Operating Temperature [Max] | Operating Temperature [Min] | Memory Interface | Voltage - Supply [Min] | Voltage - Supply [Max] | Memory Format | Memory Type | Technology | Clock Frequency | Mounting Type | Supplier Device Package | Access Time |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Microchip Technology 24LC21A/P | 10 ms | 128 | 1 Kbit | 8-DIP | 0.3 in | 7.62 mm | 70 °C | 0 °C | I2C | 2.5 V | 5.5 V | EEPROM | Non-Volatile | EEPROM | 400 kHz | Through Hole | 8-PDIP | 900 ns |
Microchip Technology 24LC21A/SN | 10 ms | 128 | 1 Kbit | 8-SOIC | 3.9 mm | 70 °C | 0 °C | I2C | 2.5 V | 5.5 V | EEPROM | Non-Volatile | EEPROM | 400 kHz | Surface Mount | 8-SOIC | 900 ns | |
Microchip Technology 24LC21T/SN | 10 ms | 128 | 1 Kbit | 8-SOIC | 3.9 mm | 70 °C | 0 °C | I2C | 2.5 V | 5.5 V | EEPROM | Non-Volatile | EEPROM | 400 kHz | Surface Mount | 8-SOIC | 900 ns | |
Microchip Technology 24LC21-I/SN | 10 ms | 128 | 1 Kbit | 8-SOIC | 3.9 mm | 85 °C | -40 °C | I2C | 2.5 V | 5.5 V | EEPROM | Non-Volatile | EEPROM | 400 kHz | Surface Mount | 8-SOIC | 900 ns | |
Microchip Technology 24LC21AT-I/SN | 10 ms | 128 | 1 Kbit | 8-SOIC | 3.9 mm | 85 °C | -40 °C | I2C | 2.5 V | 5.5 V | EEPROM | Non-Volatile | EEPROM | 400 kHz | Surface Mount | 8-SOIC | 900 ns | |
Microchip Technology 24LC21T-I/SN | 10 ms | 128 | 1 Kbit | 8-SOIC | 3.9 mm | 85 °C | -40 °C | I2C | 2.5 V | 5.5 V | EEPROM | Non-Volatile | EEPROM | 400 kHz | Surface Mount | 8-SOIC | 900 ns | |
Microchip Technology 24LC21/SN | 10 ms | 128 | 1 Kbit | 8-SOIC | 3.9 mm | 70 °C | 0 °C | I2C | 2.5 V | 5.5 V | EEPROM | Non-Volatile | EEPROM | 400 kHz | Surface Mount | 8-SOIC | 900 ns | |
Microchip Technology 24LC21-I/P | 10 ms | 128 | 1 Kbit | 8-DIP | 0.3 in | 7.62 mm | 85 °C | -40 °C | I2C | 2.5 V | 5.5 V | EEPROM | Non-Volatile | EEPROM | 400 kHz | Through Hole | 8-PDIP | 900 ns |
Microchip Technology 24LC21AT/SN | 10 ms | 128 | 1 Kbit | 8-SOIC | 3.9 mm | 70 °C | 0 °C | I2C | 2.5 V | 5.5 V | EEPROM | Non-Volatile | EEPROM | 400 kHz | Surface Mount | 8-SOIC | 900 ns |
Description
General part information
24LC21 Series
The Microchip Technology Inc. 24LC21 is a 128 x 8 bit Electrically Erasable PROM. This device is designed for use in applications requiring storage and serial transmission of configuration and control information. Two modes of operation have been implemented: Transmit-only mode and Bidirectional mode. Upon power-up, the device will be in the Transmit-only mode, sending a serial bit stream of the entire memory array contents, clocked by the VCLK pin. A valid high-to-low transition on the SCL pin will cause the device to enter the Bidirectional mode, with byte selectable read/write capability of the memory array. The 24LC21 is available in a standard 8-pin PDIP and SOIC package, in both commercial and industrial temperature ranges.
Documents
Technical documentation and resources