描述 Description

CD4508BMS dual 4-bit latch contains two identical 4-bit latches with separate STROBE, RESET, and OUTPUT DISABLE controls. With the STROBE line in the high state, the data on the D inputs appear at the corresponding Q outputs provided the DISABLE line is in the low state. Changing the STROBE line to the low state locks the data into the latch. A high on the reset line forces the outputs to a low level regardless of the state of the STROBE input. The outputs are forced to the high-impedance state for bus line applications by a high level on the DISABLE input.

特性 Features

? High-Voltage Types (20-Volt Rating)

? Two Independent 4-Bit Latches

? Individual Master Reset for Each 4-Bit Latch

? 3-State Outputs with High-Impedance State for Bus Line Applications

? Medium-Speed Operation: tPHL = tPLH = 70nS (Typ.) at VDD = 10V and CL = 50pF

? 100 Tested for Quiescent Current at 20V

? 5V, 10V, and 15V Parametric Ratings

? Standardized, Symmetrical Output Characteristics

? Maximum Input Current of 1μA at 18V Over Full Package Temperature Range; 100nA at 18V and 25oC

? 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 Standard No. 13B, Standard Specifications for Description of ‘B’ Series CMOS Devices

Applications

? Buffer Storage

? Holding Registers

? Data Storage and Multiplexing