DESCRIPTION
NAME VCC PIN 1 Positive supply pin. VREF 2 The VREF output provides reference voltage that tracks internal parameters of the IN5851N. VREF provides a negative voltage reference to the VCC supply. Its magnitude will be approximately 0.6 volt higher than the minimum operating voltage of each particular IN5851N. The typical application would be to connect the VREF pin to the GND pin (Pin 6). The supply to the VCC pin (Pin 1) should then be regulated to 150µA (IOP max). with this amount of supply current, operation of the IN5851N is guaranteed. The internal circuit of the VREF function is shown in Figure 1 with its associated I-V characteristic ___ _____ 3,4,5,13, Row1-Row4, 14,15,16 Col1-Col4 Keyboard inputs. The IN5851N incorporates an innovative keyboard scheme that allows either the standard 2-of-7 keyboard with negative common or the inexpensive single contact (form A) keyboard to be used. A valid key entry is defined by either a single row being connected to a single column or GND being simultaneously presented to both a single row and column.
Integral
