HCMOS Hcmos Family Characteristics. GENERAL These family specifications cover the common electrical ratings and characteristics of the entire HCMOS. HCMOS (“high-speed CMOS”) is the set of specifications for electrical ratings and characteristics, forming the 74HC00 family, a part of the series of. the HCMOS data sheets are guaranteed when the circuits are tested according to the conditions stated in the chapter. ‘Family Characteristics’, section ‘Family.
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Applications requiring reversible operation must make the reversing decision while the activating clock is HIGH to avoid erroneous counts.
HCMOS family characteristics FAMILY SPECIFICATIONS
In doing so, the two inner chharacteristics pins pins 15 and 16 will not have the feedback option as these pins are always configured as dedicated combinatorial output. Because of this feedback path usage, pin 19 and pin 12 do not have the feedback option in this mode. Lab 9 in this note. CS Switch capacitance; the capacitance of a terminal to a switch of an analog device. VOH HIGH level output voltage; the range of voltages at an output terminal with a specified output loading and supply voltage.
Register usage on the device forces the software to choose the registered mode. These two global and 16 individual architecture bits define all possible configurations in a GAL16V8.
CPD Power dissipation capacitance; the capacitance used to determine the hcaracteristics power dissipation per logic function, hcmox no extra load is provided to the device.
74HCT Datasheet pdf – HCMOS family characteristics – Philips
All combinatorial outputs with OE controlled by the product term will force the software to choose the complex mode. Data should be ready before the rising edge vharacteristics the WE pin according to the timing of the writing cycle.
The different device types listed in the table can be used to override the automatic device selection by the software.
The counter may be preset by the asynchronous parallel load capability of the circuit.
It is operated from a power supply of 2 to 6 V. Functional operation of this device at these or any other conditions above those indicated in the operational sections of this faamily is not implied and exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Characteristtics analog switches, e. All data pins are defined as a three-state type, controlled by the OE pin. These are stress ratings only.
Device inputs are conditioned to establish a LOW level at the output. Negative current is defined as characteristucs current flow out of a device. VH Hysteresis voltage; difference between the trigger levels, when applying a positive hcmoe a negative-going input signal.
In simple mode all feedback paths of the output pins are routed via the adjacent pins. A write cycle occurs during the overlap of a low CS and a low WE 2.
The information given on these architecture bits is only to give a better understanding of the device. These pins cannot be configured as dedicated inputs in the charactedistics mode. Multistage counters will not be fully synchronous, since there is a slight delay time difference added for each stage that is added.
Device inputs are conditioned to establish a HIGH level at the output. An important subset of the many architecture configurations hcjos with the GAL16V8 are the PAL architectures listed in the table of the macrocell description section.
The chip is in the active mode, if CS is low. Analog terms IOK Output diode current; the current flowing into a device at a specified output voltage. IS Analog switch leakage current; the current flowing into an analog switch at a specified voltage across the switch and VCC. March 17 CI Input capacitance; the capacitance measured at a terminal connected to an input of a device.
HCMOS family characteristics FAMILY SPECIFICATIONS
If one of the clock inputs is LOW during and after a chatacteristics or load operation, the characteristis LOW-to-HIGH transition of that clock will be interpreted as a legitimate signal and will be counted. IO Output source or sink current: All brand or product names are trademarks or registered trademarks of their respective holders.
A read occurs during the overlap of a low CS and a high WE 2. In these families are included several HEB family circuits which do not have TTL counterparts, and some special circuits.
It is organized with words of 8 bits in length, and operates with a single 5V power supply.
While in the read cycle, the WE pin is set to high and the OE pin is set to low to define the data pins as the output state. Documents Flashcards Grammar checker. These device types are listed in the table below. The family will have the same pin-out as the 74 series and provide the same circuit functions. Details of each of these modes are illustrated in the following pages. The terminal count outputs can be used as the clock input signals to the next higher order circuit in a multistage counter, since they duplicate the clock waveforms.
There are three global OLMC configuration modes possible: VOL LOW level output voltage; the range of voltages at an output terminal with a specified output loading and supply voltage.
Registered outputs have eight product terms per output. In complex mode pin 1 and pin 11 become dedicated inputs and use the feedback paths of pin 19 and pin 12 respectively. CL Output load capacitance; the capacitance connected to an output terminal including jig and probe capacitance.