74HCT237

The 74HCT237 is designed as high-speed si-gate CMOS devices and are pin compatible with low power schottky TTL (LSTTL). It is specified in compliance with JEDEC standard no. 7A. It is 3-to-8 line decoder/demultiplexers with latches at the three address inputs (An).

The five features of the 74HCT237. The first one is it combines 3-to-8 decoder with 3-bit latch. The second one is multiple input enable for easy expansion or independent controls. The third one is active high mutually exclusive outputs. The fourth one is its output capability is standard. The fifth one is its ICC category would be MSI. That are all the main features.

Some important AC characteristics and specifications of the 74HCT237 have been concluded into several points as follow.For Tamb=25°C the first one is about its propagation delay An to Yn which would be typ 52ns and max 160ns at Vcc=2.0V and would be typ 19ns and max 32ns at Vcc=4.5V and would be typ 15ns and max 27ns at Vcc=6.0V. The second one is about its propagation delay LE to Yn which would be typ 61ns and max 190ns at Vcc=2.0V and typ 22ns and max 38ns at Vcc=4.5V and would be typ 18ns and max 32ns at Vcc=6.0V. The third one is about its output transition time which would be typ 19ns and max 75ns at Vcc=2.0V and typ 7ns and max 15ns at Vcc=4.5V and would be typ 6ns and max 13ns at Vcc=6.0V.

Also for the Tamb range of the 74HCT237 -40 to +125°C the first one is about its propagation delay An to Yn which would be max 240ns at Vcc=2.0V and would be max 48ns at Vcc=4.5V and would be max 41ns at Vcc=6.0V. The second one is about its propagation delay LE to Yn which would be max 285ns at Vcc=2.0V and max 57ns at Vcc=4.5V and would be max 48ns at Vcc=6.0V. The third one is about its output transition time which would be max 110ns at Vcc=2.0V and max 22ns at Vcc=4.5V and would be max 19ns at Vcc=6.0V. And so on. For more information please contact us.

The 74HCT237 is high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.

The 74HCT237 is 3-to-8 line decoder/demultiplexers with latches at the three address inputs (An). The "237" essentially combines the 3-to-8 decoder function with a 3-bit storage latch. When the latch is enabled (LE = LOW), the "237" acts as a 3-to-8 active LOW decoder. When the latch enable (LE) goes from LOW-to-HIGH, the last data
present at the inputs of the 74HCT237 before this transition, is stored in the latches. Further address changes are ignored as long as
LEremains HIGH.

The output enable input (E₁ and E₂) of the 74HCT237 controls the state of the outputs independent of the address inputs or latch operation. All outputs are HIGH unless E₁ is LOW and E₂ is HIGH.

The "237" is ideally suited for implementing non-overlapping decoders in 3-state systems and strobed (stored address) applications in bus oriented systems.