CD4527BMS

CD4527BMS December 1992 CMOS BCD Rate Multiplier Description CD4527BMS is a low power 4-bit digital rate multiplier that provides an output pulse rate which is the clock input pulse rate multiplied by 1/10 times the BCD input. For example, when the BCD input is 8, there will be 8 output pulses for every 10 input pulses. This device may be used to perform arithmetic operations (add, subtract, divide, raise to a power), solve algebraic and differential equations, generate natural logarithms and trigonometric functions, A/D and D/A conversion, and frequency division. For fractional multipliers with more than one digit, CD4527BMS devices may be cascaded in two different modes: the Add mode and the Multiply mode (see Figures 9 and 11). In the Add mode, Output Rate = (Clock Rate) [0.1BCD1 + 0.01BCD2 + 0.001BCD3 + . . .] Features High Voltage Type (20V Rating) Cascadable in Multiples of 4-Bits Set to “9” Input and “9” Detect Output 100% Tested for Quiescent Current at 20V 5V, 10V and 15V Parametric Ratings Maximum Input Current of 1µA at 18V Over Full Package Temperature Range; 100nA at 18V and +25oC Noise Margin (Over Full Package/Temperature Range) - 1V at VDD = 5V - 2V at VDD = 10V - 2.5V at VDD = 15V Standardized Symmetrical Output Characteristics Meets All Requirements of JEDEC Tentative Standard No. 13B, “Standard Specifications for Description of ‘B’ Series CMOS Devices” In the Multiply mode, the fraction programmed into the first rate multiplier is multipl...