SN74AHCT139DBR

The ’AHCT139 devices are dual 2-line to 4-line decoders/demultiplexers designed for 4.5-V to 5.5-V VCC operation. These devices are designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. When used with high-speed memories utilizing a fast enable circuit, the delay times of these decoders and the enable time of the memory usually are less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible. The active-low enable (overline{G}) input can be used as a data line in demultiplexing applications. These decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its driving circuit.

Applications

• High-speed memory decoder
• Data transmission systems
• High-performance memory decoding
• Data routing applications requiring extremely short propagation delay
• High-performance memory systems for minimizing system decoding impact

Key features

• TTL-compatible inputs
• Dual enable inputs for simplified cascading and data reception
• Latch-up performance exceeds 250mA per JESD 17
• ESD protection exceeds JESD 22
• ESD protection ratings: Human Body Model 2000V (A114-A), Machine Model 200V (A115-A), Charged Device Model 1000V (C101)
• Fully buffered inputs — each input presents one normalized load to the driving circuit
• Pins with no internal connection marked as NC
• Absolute maximum ratings: supply voltage range -0.5V to 7V, input voltage range -0.5V to 7V, output voltage range -0.5V to VCC+0.5V, input clamp current -20mA, output clamp current ±20mA, continuous output current ±25mA, continuous current through VCC or GND 75mA, storage temperature range -65℃ to 150℃
• Package thermal resistance by package type: D package 73℃/W, DB package 82℃/W, DGV package 120℃/W, N package 67℃/W, NS package 64℃/W, PW package 108℃/W
• Available package options: SN54AHCT139 supports J, W, FK packages; SN74AHCT139 supports D, DB, DGV, N, NS, PW packages