74138 ic In Pakistan

24C64 is a 64Kbit CMOS non-volatile serial EEPROM organized as 8K x 8-bit memory. This Memory IC confirms to Extended IIC 2-wire protocol that allows accessing of memory in excess of 16Kbit on an IIC bus. This serial communication protocol uses a Clock signal (SCL) and a Data signal (SDA) to synchronously clock data between a master (e.g. a microcontroller) and a slave (EEPROM). 24C64 is designed to minimize pin count and simplify PC board layout requirements. 24C64 offers hardware write protection whereby the entire memory array can be write-protected by connecting the WP pin to VCC. This section of memory then becomes unalterable until the WP pin is switched to VSS. This device is offered in SO, TSSOP, and DIP packages.

The ULN2803A is a high-voltage, high-current Darlington transistor array. The device consists of eight NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The collector-current rating of each Darlington pair is 500 mA. The Darlington pairs may be connected in parallel for higher current capability. Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers. The ULN2803A has a 2.7-k series base resistor for each Darlington pair for operation directly with TTL or 5-V CMOS devices