CD4029BC

Features:

*Wide supply voltage range:  3V to 15V
*High noise immunity: 0.45 V_DD  (typ.)
*Low power TTL compatibility: fan out of 2 driving 74L or 1 driving 74LS
*Parallel jam inputs
*Binary or BCD decade up/down counting


Specifications

DC Supply Voltage (V_DD )                                    -0.5V to.  18 V_DC
Input Voltage (V_IN )                                     -0.5V to. V_DD 0.5 V_DC
Storage Temperature Range (T_S )                     -65 ^oC to. 150 ^oC
Power Dissipation (P_D )
   Dual-In-Line                                                                  700 mW
   Small Outline                                                                 500 mW
Lead Temperature (T_L)
   (Soldering, 10 seconds)                                                  260°C


Description

The CD4029BC is a presettable up/down counter which counts in either binary or decade mode depending on the voltage level applied at binary/decade input. When binary/decade is at logical "1", the counter counts in binary, otherwise it counts in decade. Similarly, the counter counts up when the up/down input is at logical "1" and vice versa.


A logical "1" preset enable signal allows CD4029BC information at the "jam" inputs to preset the counter to any state asynchronously with the clock. The CD4029BC counter is advanced one count at the positive-going edge of the clock if the carry in and preset enable inputs are at logical "0". Advancement is inhibited when either or both of these two inputs is at logical "1". The carry out signal is normally at logical "1" state and goes to logical "0" state when the counter reaches CD4029BC's maximum count in the "up" mode or the minimum count in the "down" mode provided the carry input is at logical "0"state.


All CD4029BC inputs are protected against static discharge by diode clamps to both V_DD and V_SS .