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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Multistage counters will not be fully synchronous, since there is a slight delay time difference added for each stage that is added. GND Supply voltage; for a device with a single negative power supply, the most negative power supply, used as the reference level for other voltages; typically ground.
VOL LOW level output voltage; the range of voltages at an output terminal with a specified output loading and supply voltage.
Details of each of these modes are illustrated in the following pages. Because of this feedback path ycmos, pin 19 and pin 12 do not have the feedback option in this mode. These two global and 16 individual architecture bits define all possible configurations in a GAL16V8.
Only one clock input can be held HIGH at any time, or erroneous operation will result.
Applications requiring reversible operation must make characterisics reversing decision while the activating clock is HIGH to avoid erroneous counts. The information given on these architecture bits is only to give a better understanding of the device. All combinatorial 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.
All registered macrocells share common clock and output enable control pins.
HCMOS family characteristics FAMILY SPECIFICATIONS
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. 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.
Most compilers have the ability to automatically select the device type, generally based on the register usage and output enable OE usage. Negative current is defined as conventional current flow out of a device. The family will have the same pin-out as the 74 series and provide the same circuit functions.
When using compiler software to configure the device, the user must pay special attention hcnos the following restrictions in each mode. VOH HIGH level output voltage; the range of voltages at an output terminal with a specified output loading and supply voltage.
CPD Power dissipation capacitance; the capacitance used to determine the dynamic power dissipation per logic function, when no extra load is provided to bcmos device. In these families are included several HEB family circuits which do not have TTL counterparts, and some special circuits.
During a write cycle, the data pins are defined as the input state by setting the WE pin to low. There are three global OLMC configuration modes possible: The software will choose the simple mode only when all outputs are dedicated combinatorial without OE control.
IO Output source or sink current: ON-resistance; the effective ON-state resistance of an analog switch, at a specified voltage across the switch and output load. A write cycle occurs during the overlap of a low CS and a low WE 2. 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.
The counter may be preset by the characteristica parallel load capability of the circuit. For further details, refer to the characteristcis software manuals. The chip is in the active mode, if CS is low. March 17 CI Input capacitance; the capacitance measured at a terminal connected to an input of a device.
Functional operation of this device at these or any other conditions faimly those indicated in the operational sections of this specification is not implied and exposure to absolute maximum rating conditions for extended periods may affect device reliability.
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.
characterisgics A read occurs during the overlap of a low CS and a high WE 2. All data pins are defined as a three-state type, controlled by the OE pin.
HCMOS family characteristics FAMILY SPECIFICATIONS
Device inputs are conditioned to establish a LOW level at the output. All brand or product names are trademarks or registered trademarks of their respective holders.
In doing so, the two inner most pins pins 15 and 16 will not have the feedback option as these pins are always configured as dedicated combinatorial output. Lab 9 in this note. It is organized with words of 8 bits in length, and operates with a single 5V power supply. IIK Input diode current; the current flowing charactteristics a device at a specified input voltage. 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 development software configures all of the architecture control bits and checks for proper pin usage automatically. CL Famuly load capacitance; the capacitance connected to an output terminal including jig and probe capacitance.
HCMOS – Wikipedia
The specifications and information herein are subject to change without notice. IS Analog switch leakage current; the famuly flowing into an analog switch at a specified voltage across the switch and VCC. For analog switches, e. 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.
In complex mode pin 1 and pin 11 become dedicated inputs and use the feedback paths of pin 19 and pin 12 respectively. VCC Supply voltage; the most positive potential on the device. Data should be ready before the rising edge of 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.
H stands for high level L stands for low level. OE may be both high and low in a write cycle 3. VH Hysteresis voltage; difference between the trigger levels, when applying a positive and a negative-going input signal. Documents Flashcards Grammar checker.