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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Analog terms IOK Output diode current; the current flowing into a device at a specified output voltage. There are three global OLMC configuration modes possible: These device types are listed in the table below. The Xharacteristics bus of the HT is designed as a tri-state type.
HCMOS family characteristics FAMILY SPECIFICATIONS
These pins cannot be configured as dedicated inputs in the registered mode. Register usage on the device forces the software to choose the registered mode. CL Output load capacitance; the capacitance connected to an output terminal including jig and probe capacitance. Sequence Clear reset outputs to zero ; load preset to binary thirteen; count up to fourteen, fifteen, terminal count up, zero, one and two; count down to one, zero, terminal count down, fifteen, Fig.
The counter may be preset by the asynchronous parallel load capability of the circuit. The device can be cleared at any time by the asynchronous master reset input MR ; it may also be loaded in parallel by activating the asynchronous parallel load input PL.
The information given on these architecture bits is only to give a better understanding of the device. Negative current chaaracteristics defined as conventional current flow out of a device.
Only one clock input can be held HIGH at any time, or erroneous operation will result. All characterisrics outputs with OE controlled by the product term will force the software to choose the complex mode.
It is operated from a power supply of 2 to 6 V. The specifications and information herein are subject to change without notice. These two global and 16 individual architecture bits define all possible configurations in a GAL16V8.
If one of the clock inputs is LOW during and after a reset or load operation, the next LOW-to-HIGH transition of that clock will be interpreted as a legitimate signal and will be counted. When using compiler software to configure the device, the user must pay special attention to the following restrictions in each mode.
74HCT Datasheet pdf – HCMOS family characteristics – Philips
ON-resistance; the effective ON-state resistance of an analog switch, at a specified voltage across the switch and output load. A read occurs during the overlap of a low CS and a high WE 2. Characterisitcs 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 characterietics the following pages. The development software configures all of the architecture control bits and checks for proper pin usage automatically.
In complex mode pin 1 and pin 11 become dedicated inputs and use the feedback paths of pin 19 and pin 12 respectively. Most compilers have the ability to automatically select the device type, generally based on the register usage and output enable OE usage.
Fsmily Supply voltage; the most positive potential on the device. VOL LOW level output voltage; the range of voltages at an output terminal with a specified output loading and supply voltage. IIK Input diode current; the current flowing into a device at a specified input voltage.
A write cycle occurs during the overlap of a low CS and a low WE 2. An important subset of the many architecture configurations possible with the GAL16V8 are the PAL architectures listed in the table of the macrocell description section. March 17 CI Input capacitance; the chwracteristics measured at a terminal connected to characteristicz input of a device. VOH HIGH level output voltage; the range of voltages at an output terminal with a specified output loading and supply voltage.
Because of famipy feedback path usage, pin 19 and pin 12 do not have the feedback option in this mode.
HCMOS – Wikipedia
The different device types listed in the table can be used to override the automatic device selection by the software. The terminal count outputs can be used as the clock input signals to the next higher order circuit in characeristics multistage counter, since they duplicate the clock waveforms.
Registered outputs have eight product terms per output.
Information present on the parallel data inputs D0 to D3 is loaded into the counter and appears on the outputs Q0 to Q3 regardless of the conditions of the clock inputs when the parallel load PL input is LOW. In these families are included several HEB family circuits which do not have TTL counterparts, and some special circuits. For further details, refer to the compiler software manuals.
All registered macrocells share common clock and output enable control pins. All data pins are defined as a three-state type, controlled by the OE pin. CPD Power dissipation capacitance; the capacitance used to determine the dynamic power dissipation per logic function, when no extra load is provided to the device.
Characterisics may be both high and low in a write cycle 3. For analog switches, e.
Multistage counters will not vharacteristics fully synchronous, since there is a slight delay time difference added for each stage that is added. The software will choose the simple mode only when all outputs are dedicated combinatorial without OE control.
The chip is in the active mode, if CS is low. During a write cycle, the data pins are defined as the input state by setting the WE pin to low. VH Hysteresis voltage; difference between the trigger levels, when applying a positive and a negative-going input signal. These are stress ratings only. Device inputs are conditioned to establish a HIGH hdmos at the output.