74HC259PW

The 74HC259 and 74HCT259 are 8-bit addressable latches. The devices feature four operating modes. In addressable latch mode, data at the D input is written into the latch addressed by inputs A0 to A3. The addressed latch follows the data input, while unaddressed latches retain their previous states. In memory mode, all latches retain their previous states regardless of data or address inputs. In 3-line-to-8-line decoding or demultiplexing mode, the addressed output follows the D input while all other outputs are held low. In reset mode, all outputs are forced low regardless of data or address inputs. Inputs include clamping diodes, enabling the use of current-limiting resistors to connect inputs to voltages exceeding VCC.

Key features

• Wide supply voltage range: 2.0 V to 6.0 V
• Latch-up performance exceeds 250 mA
• JEDEC compliant: JESD8C (2.7 V to 3.6 V); JESD7A (2.0 V to 6.0 V)
• Integrated demultiplexer and 8-bit latch
• Serial-to-parallel conversion capability
• Output for each storage bit
• Random (addressable) data input support
• Easy to expand
• Common reset input
• Usable as 3-line to 8-line active-HIGH decoder
• Input levels: CMOS for 74HC259; TTL for 74HCT259
• ESD protection: HBM: ANSI/ESDA/JEDEC JS-001 Class 2 exceeds 3500 V; CDM: ANSI/ESDA/JEDEC JS-002 Class C3 exceeds 2000 V
• Multiple package options
• Operating temperature range: -40°C to +85°C and -40°C to +125°C