The TC74VH138F is a high-speed silicon gate CMOS decoder/demultiplexer manufactured by Toshiba Semiconductor and Storage. It accepts three binary weighted address inputs (A0, A1, and A2) and, depending upon the address applied, provides one of eight mutually exclusive outputs. The device features three enable inputs (E1, E2, and E3). E1 and E2 must be LOW, and E3 must be HIGH for proper decoding.

Applications:

  
• Memory decoding
  
• Data routing
  
• Address decoding
  
• Demultiplexing applications
  
• Logic pattern generation

Features:

  
• High-speed operation: tpd = 4.8 ns (typ.) at VCC = 5 V
  
• Low power consumption: ICC = 4 μA (max) at VCC = 5.5 V
  
• Wide operating voltage range: VCC = 2 V to 5.5 V
  
• Outputs drive capability: 10 LSTTL loads
  
• Three enable inputs for easy expansion
  
• Package: SO16

Benefits:

  
• High-speed address decoding:  Fast decoding ensures minimal delay in accessing memory or routing data.
  
• Low power consumption: Minimizes power requirements, suitable for battery-powered or energy-sensitive applications.
  
• Versatile applications: Can be used in a variety of decoding and demultiplexing scenarios.
  
• Easy expansion: The three enable inputs facilitate cascading multiple devices to decode larger address spaces.
  
• Wide operating voltage range: Adaptable to various system voltage levels.

When any one of the enable inputs is in the inactive state, all eight outputs are forced HIGH. This feature allows for easy cascading of multiple TC74VH138F devices to decode larger address spaces. The device's high speed and low power consumption make it an ideal choice for a wide range of digital applications.

The TC74VH138F is a pin-compatible replacement for the 74LS138 and 74HC138 devices. However, it offers improved performance and lower power consumption compared to these older technologies. The device is available in a SO16 package. It Operates across a broad temperature range making it suitable for industrial and automotive applications.