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EC24C08A Datasheet(PDF) 3 Page - E-CMOS Corporation

Part # EC24C08A
Description  2K/4K/8K/16K-bit 2-WIRE SERIAL CMOS EEPROM
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Manufacturer  E-CMOS [E-CMOS Corporation]
Direct Link  http://www.ecmos.com.tw/
Logo E-CMOS - E-CMOS Corporation

EC24C08A Datasheet(HTML) 3 Page - E-CMOS Corporation

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EC24C02A/04A/08A/16A
2K/4K/8K/16K-bit 2-WIRE SERIAL CMOS EEPROM
E-CMOS Corp. (www.ecmos.com.tw)
Page 3 of 18
5H06N-Rev.F004
Pin Descriptions
DEVICE/PAGE ADDRESSES (A2, A1 and A0): The A2, A1 and A0 pins are device address inputs that are
hard-wired for the EC24C02A. Eight 2K devices may be addressed on a single bus system (device
addressing is discussed in detail under the Device Addressing section).
The EC24C04A uses the A2 and A1 inputs for hard-wired addressing and a total of four 4K devices may be
addressed on a single bus system. The A0 (P0) pin is a no connection or can be connected to ground.
The EC24C08A only uses the A2 input for hard-wired addressing and a total of two 8K devices may be
addressed on a single bus system. The A0 (P0) and A1 (P1) pins are no connections or can be connected to
ground.
The EC24C16A does not use the device address pins, which limits the number of devices on a single bus to
one. The A0 (P0), A1 (P1), and A2 (P2) pins are no connections or can be connected to ground.
SERIAL DATA (SDA): The SDA pin is bi-directional for serial data transfer. This pin is open-drain driven and
may be wire-ORed with any number of other open-drain or open- collector devices.
SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each EEPROM device and
negative edge clock data out of each device.
WRITE PROTECT (WP): The EC24C02A/04A/08A/16A has a Write Protect pin that provides hardware data
protection. The Write Protect pin allows normal read/write operations when connected to ground (GND).
When the Write Protect pin is connected to VCC, the write protection feature is enabled and operates as
shown in the following.
Write Protect
WP Pin Status
Part of the Array Protected
EC24C02A
EC24C04A
EC24C08A
EC24C16A
At VCC
Full (2K) Array
Full (4K) Array
Full (8K) Array
Full (16K) Array
At GND
Normal Read / Write Operations
Ordering Information


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