ACE24C256B Datasheet PDF - ACE Technology
| Part Number | ACE24C256B | |
| Description | Two-wire Serial EEPROM | |
| Manufacturers | ACE Technology | |
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ACE24C128B/256B/512B
Two-wire Serial EEPROM
Description
The ACE24C128B/256B/512B provides 131,072/262,144/524,288 bits of serial electrically erasable and
programmable read-only memory (EEPROM), organized as 16,384/32,768/65,536 words of 8 bits each. The device is
optimized for use in many industrial and commercial applications where low-power and low-voltage operation are
essential. The ACE24C128B/256B/512B is available in space-saving 8-lead PDIP, 8-lead SOP, and 8-lead TSSOP
packages and is accessed via a two-wire serial interface. In addition, the ACE24C128B/256B/512B is available in
1.7V (1.7V to 5.5V) version.
Features
Wide Voltage Operation
- VCC = 1.7V to 5.5V
Operating Ambient Temperature: -40℃ to +85℃
Internally Organized:
- ACE24C128B, 16,384 * 8 (128K bits)
- ACE24C256B, 32,768 * 8 (256K bits)
- ACE24C512B, 65,536 * 8 (512K bits)
Two-wire Serial Interface
Schmitt Trigger, Filtered Inputs for Noise Suppression
Bidirectional Data Transfer Protocol
1 MHz (5V), 400 KHz (1.7V, 2.5V, 2.7V) Compatibility
Write Protect Pin for Hardware Data Protection
64-byte Page (128K, 256K), 128-byte (512K) Write Modes
Partial Page Writes Allowed
Self-timed Write Cycle (5 ms max)
High-reliability
- Endurance: 1 Million Write Cycles
- Data Retention: 100 Years
Absolute Maximum Ratings
DC Supply Voltage
-0.3 to 6.5V
Input / Output Voltage
GND-0.3V to VCC+0.3V
Operating Ambient Temperature
-40℃ to 85℃
Storage Temperature
-65℃ to 150℃
*Notice: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a
stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of this specification are not implied. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
VER 1.4 1
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ACE24C128B/256B/512B
Two-wire Serial EEPROM
Device Operation
Clock and Data Transitions:
The SDA pin is normally pulled high with an external device. Data on the SDA pin may change only
during SCL low time periods (see to Figure 1 on page 4). Data changes during SCL high periods will
indicate a start or stop condition as defined below.
Start Condition:
A high-to-low transition of SDA with SCL high is a start condition which must precede any other
command (see to Figure 2 on page 4).
Stop Condition:
A low-to-high transition of SDA with SCL high is a stop condition. After a read sequence, the stop
command will place the EEPROM in a standby power mode (see Figure 2 on page 4).
Acknowledge:
All addresses and data words are serially transmitted to and from the EEPROM in 8-bit words. The
EEPROM sends a "0" to acknowledge that it has received each word. This happens during the ninth
clock cycle.
Standby Mode:
The ACE24C128B/256B/512B features a low-power standby mode which is enabled: (a) upon
power-up and (b) after the receipt of the STOP bit and the completion of any internal operations
Memory Reset:
After an interruption in protocol, power loss or system reset, any two-wire part can be reset by following
these steps:
1. Clock up to 9 cycles.
2. Look for SDA high in each cycle while SCL is high.
3. Create a start condition.
Figure 1: Data Validity
VER 1.4 5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ACE24C256B electronic component. |
| Information | Total 17 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ACE24C256B.PDF Datasheet ] | |
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