HEF4541B Datasheet | Nexperia

description The HEF4541B is a programmable timer. It consists of a 16-stage binary counter, an integrated oscillator to be used with external timing ponents, an automatic power-on reset and output control logic. The external ponents RTC and CTC determines the frequency of the oscillator within the frequency range 1 Hz to 100 k Hz. An external clock signal at input RS can replace the oscillator. The timer advances on the positive-going transition of RS. A LOW on the auto reset input (AR) and a LOW on the master reset input (MR) enables the internal power-on reset. A HIGH level at input MR resets the counter independent on all other inputs. Resetting, disables the oscillator to provide no active power dissipation. A HIGH at input AR turns off the power-on reset to provide a low quiescent power dissipation of the timer. The 16-stage counter divides the oscillator frequency by 28, 210, 213 or 216 depending on the state of the address inputs (A0, A1). The divided oscillator frequency is available at output O. The phase input (PH) features a plementary output signal. When the mode select input (MODE) is LOW the timer is a single transition timer and when HIGH the timer is a 2n frequency divider. It operates over a remended VDD power supply range of 3 V to 15 V referenced to VSS (usually ground). Unused inputs must be connected to VDD, VSS, or another input. 2. Features and benefits - Wide supply voltage range from 3.0 V to 15.0 V - CMOS low power dissipation - High noise immunity - Fully static operation - 5 V, 10 V, and 15 V parametric ratings - Standardized symmetrical output characteristics - plies with JEDEC standard JESD 13-B - ESD protection: - HBM JESD22-A114F exceeds 2000 V - MM JESD22-A115-A exceeds 200 V - Specified from -40 °C to +85 °C and from -40 °C to +125 °C 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name HEF4541BT -40 °C to +125 °C SO14 Description plastic small outline package; 14 leads; body...