The HEF4518BP is a 4-bit dual internally synchronous BCD Counter has an active high clock input (nCP0) and an active low clock input (nCP1\), buffered outputs from all four bit positions (nQ0 to nQ3) and an active high overriding asynchronous master reset input (nMR). The counter advances on either the low-to-high transition of the nCP0 input if nCP1\ is high or the high-to-low transition of the nCP1\ input if nCP0 is low. Either nCP0 or nCP1\ may be used as the clock input to the counter and the other clock input may be used as a clock enable input. A high on nMR resets the counter (nQ0 to nQ3 = low) independent of nCP0, nCP1\. Schmitt trigger action in the clock input makes the circuit highly tolerant of slower clock rise and fall times. It operates over a recommended VDD power supply range of 3 to 15V referenced to VSS (usually ground). Unused inputs must be connected to VDD, VSS or another input.
Tolerant of slow clock rise and fall time
Fully static operation
Standardized symmetrical output characteristics
Complies with JEDEC standard JESD 13-B
Medical, Industrial, Consumer Electronics, Automation & Process Control
: 16 Pins
These came to us as part of a lot of surplus stock from a large Milspec type OEM and have been kept in storage for some years, we have therefore classified them as ‘new other’. They are however unused and in pristine condition and as with all our products come with a full guarantee. They are date coded 87
For datasheet search….Philips HEF4518BP
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