Description

The CD40208BMS is a 4 x 4 multiport register containing four 4-bit registers, write address decoder, two separate read address decoders, and two 3-state output buses.

Features

• High Voltage Types (20V Rating)

• One Input and Two Output Buses

• Unlimited Expansion in Bit and Word Directions

• Data Lines have Latched Inputs

• 3-State Outputs

• Separate Control of Each Bus, Allowing Simultaneous Independent Reading of any of Four Registers on Bus A and Bus B and Independent Writing Into any of the Four Registers

• 100 Tested for Quiescent Current at 20V

• Standardized, Symmetrical Output Characteristics

• 5V, 10V and 15V Parametric Ratings

• Maximum Input Current of 1µA at 18V Over Full Package-Temperature Range; 100nA at 18V and +25°C

• Noise Margin (Full Package-Temperature Range):

    - 1V at VDD = 5V

    - 2V at VDD = 10V

    - 2.5V at VDD = 15V

• Meets All Requirements of JEDEC Tentative Standards No. 13B, “Standard Specifications for Description of “B” Series CMOS Devices”

Applications

• Scratch Pad Memories

• Arithmetic Units

• Data Storage