The BL0952A / BL6513 / BL6511 is the chief IC of the three-phase electrical meter and a high accuracy energy measurement IC. With low power design, static power is only 25mW. Based on the features such as superior accuracy, high stability and simple peripheral circuit, the Device is compatible with 3-phase 3-wire and 3-phase 4-wire configurations.
The Device is based on digital signal processing. The Device can measure positive active power and negative active power; can select the way to calculate the sum of the three-phase active powers, between the arithmetic sum and the absolute value sum.
The high frequency output CF can be used in calibration and data processing. The low frequency outputs F1 and F2 can be used to drive a pulse-motor or an electromechanical counter. In this way, the power can be measured and the energy can be recorded.
The internal phase matching circuitry ensures that the current and voltage channels are phase matched.An internal no-load threshold ensures that the BL0952A/BL6513/BL6511 does not exhibit any creep when there is no load.
The 74HC/HCT123 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC/HCT123 are dual retriggerable monostable multivibrators with output pulse width control by three methods. The basic pulse time is programmed by selection of an external resistor (REXT) and capacitor (CEXT). The external resistor and capacitor are normally connected as shown in Fig.6. Once triggered, the basic output pulse width may be extended by retriggering the gated active LOW-going edge input (nA) or the active HIGH-going edge input (nB). By repeating this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made as long as desired. Alternatively an output delay can be terminated at any time by a LOW-going edge on input nRD, which also inhibits the triggering.
• DC triggered from active HIGH or active LOW inputs • Retriggerable for very long pulses up to 100% duty factor • Direct reset terminates output pulse • Schmitt-trigger action on all inputs except for the reset input • Output capability: standard (except for nREXT/CEXT) • ICCcategory: MSI
Pinout and Function Table
Other data sheets within the file : 74HC123D, 74HC123DB, 74HC123N, 74HC123PW