1 General description
The 74HC4515 is a 4-to-16 line decoder/demultiplexer having four binary weighted
address inputs (A0 to A3) with latches, a latch enable input (LE), an enable input (E) and
16 inverting outputs (Q0, to Q15).
When LE is HIGH, the selected output is determined by the data on An. When LE goes
LOW, the last data present at An are stored in the latches and the outputs remain stable.
When E is LOW, the selected output, determined by the contents of the latch, is LOW.
When E is HIGH, all outputs are HIGH. The enable input E does not affect the state of
the latch. When the device is used as a demultiplexer, E is the data input and A0 to A3
are the address inputs.
Inputs include clamp diodes. This enables the use of current limiting resistors to interface
inputs to voltages in excess of VCC.
2 Features and benefits
• Inverting outputs
• CMOS input levels
• 16-line demultiplexing capability
• Decodes 4 binary-coded inputs into 16 mutually-exclusive outputs
• Complies with JEDEC standard no. 7 A
• ESD protection:
– HBM JESD22-A114F exceeds 2000 V
– MM JESD22-A115-A exceeds 200 V
• Specified from -40 °C to +85 °C and -40 °C to +125 °C
3 Applications
• Digital multiplexing
• Address decoding
• Hexadecimal/BCD decoding