1. General description

The 74HC259-Q100; 74HCT259-Q100 is an 8-bit addressable latch. The device features four

modes of operation. In the addressable latch mode, data on the D input is written into the latch

addressed by the inputs A0 to A3. The addressed latch will follow the data input, non-addressed

latches will retain their previous states. In memory mode, all latches retain their previous states and

are unaffected by the data or address inputs. In the 3-to-8 decoding or demultiplexing mode, the

addressed output follows the D input and all other outputs are LOW. In the reset mode, all outputs

are forced LOW and unaffected by the data or address inputs. Inputs include clamp diodes. This

enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

This product has been qualified to the Automotive Electronics Council (AEC) standard Q100

(Grade 1) and is suitable for use in automotive applications.

2. Features and benefits

? Automotive product qualification in accordance with AEC-Q100 (Grade 1)

? Specified from -40 °C to +85 °C and from -40 °C to +125 °C

? Wide supply voltage range from 2.0 V to 6.0 V

? Latch-up performance exceeds 100 mA per JESD 78 Class II Level B

? Complies with JEDEC standards:

? JESD8C (2.7 V to 3.6 V)

? JESD7A (2.0 V to 6.0 V)

? Combined demultiplexer and 8-bit latch

? Serial-to-parallel capability

? Output from each storage bit available

? Random (addressable) data entry

? Easily expandable

? Common reset input

? Useful as a 3-to-8 active HIGH decoder

? Input levels:

? For 74HC259-Q100: CMOS level

? For 74HCT259-Q100: TTL level

? ESD protection:

? MIL-STD-883, method 3015 exceeds 2000 V

? HBM JESD22-A114F exceeds 2000 V

? MM JESD22-A115-A exceeds 200 V (C = 200 pF, R = 0 Ω)

? Multiple package options

? DHVQFN package with Side-Wettable Flanks enabling Automatic Optical Inspection (AOI) of

solder joints