Open Collector WIRE-OR & WIRE-AND connection Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12737
Indian Lab Suppliers supplies the Open Collector WIRE-OR & WIRE-AND connection (Product ID: 12737) as part of its electronics engineering lab equipment range. It shows how open-collector gate outputs can be tied together to form wired-AND and wired-OR functions.
Quick Answer
An open-collector output can only pull a line low, so several outputs sharing one pull-up resistor give a line that goes low when any output is low: a wired-AND in positive logic, which reads as a wired-OR in negative logic. The board uses a quad 2-input open-collector NAND gate IC, four SPDT switches for the inputs and LEDs for the result. A 5 V DC, 100 mA regulated supply is built in and the unit runs from 230 V ±10%, 50 Hz mains.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiments | Open-collector gates; wire-OR and wire-AND connection of gates |
| Gate IC | Quad 2-input NAND, open collector |
| Inputs | 4 SPDT switches |
| Indicators | LEDs |
| Internal supply | 5 V DC, 100 mA, IC regulated |
| Mains | 230 V ±10%, 50 Hz AC; ON/OFF switch, fuse and jewel light |
Where This Is Used
Used when teaching bus lines and gate output stages; it leads on to the Interfacing CMOS IC's to TTL & TTL to CMOS IC's (Product ID: 12738) and relates to the Dual Nature of Logic Gates (Product ID: 12731). Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
Why can ordinary totem-pole outputs not be wired together?
One output driving high while another drives low would short the supply through both output stages.
What does wired-AND of NAND gates give?
An AND-OR-INVERT function of the gate inputs.
How many input switches are there?
Four SPDT switches.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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