Click Here to enter Utsource site
Hello! Sign In or Register now
APP Datasheet 380K likes Utsource
1.2 Million+ Like Utsource
Buy(0)
Inquiry(0)
Dear customers, due to the implementation of the GDPR policy in Europe, UTSOURCE has also made adjustment accordingly to meet the policy requirements. Please read the new privacy policy carefully and this window will no longer pop up after you accept it.
Delivery Address
+ Add Address
The new shipping address
* Please fill in the cell phone number correctly to make sure that you can receive the tracking info in time.
Country Code
Favorite
Utsource certified used parts
Utsource certified used parts provide the following guarantees:
1. Utsource will inspect the goods, including appearance inspection (no serious damage to the appearance), select qualified and honest suppliers, and ensure 98% qualification rate.
2. Some parts are tested by machine.
3. Utsource certified parts can be returned and refunded unconditionally within 60 days.
Description
20-Key Encoder
Package: DIP
No of Pins: 20
Container: Rail
All product names, trademarks, brands and logos used on this site are the property of their respective owners. The depiction, description or sale of products featuring these names, trademarks, brands and logos is for identification purposes only and is not intended to indicate any affiliation with or authorization by any rights holder.
The parameters and performance indicators of this product are sourced from the internet. In case of discrepancies, please refer to the manufacturer's technical specifications!！
General Description
The MM74C922 and MM74C923 CMOS key encoders provide all the necessary logic to fully encode an array of SPST switches. The keyboard scan can be implemented by either an external clock or external capacitor. These encoders also have on-chip pull-up devices which permit switches with up to 50 kΩ on resistance to be used. No diodes in the switch array are needed to eliminate ghost switches. The internal debounce circuit needs only a single external capacitor and can be defeated by omitting the capacitor. A Data Available output goes to a high level when a valid keyboard entry has been made. The Data Available output returns to a low level when the entered key is released, even if another key is depressed. The Data Available will return high to indicate acceptance of the new key after a normal debounce period; this two-key roll-over is provided between any two switches.
An internal register remembers the last key pressed even after the key is released. The 3-STATE outputs provide for easy expansion and bus operation and are LPTTL compatible.
Features
● 50kΩ maximum switch on resistance
● On or off chip clock
● On-chip row pull-up devices
● 2 key roll-over
● Keybounce elimination with single capacitor
● Last key register at outputs
● 3-STATE output LPTTL compatible
● Wide supply range: 3V to 15V
● Low power consumption
| QUANTITY | UNIT PRICE | PLUS UNIT PRICE | TOTAL PRICE |
|---|---|---|---|
| ≥1: | US $2.29515 | US $2.06564 | US $2.06564 |
| ≥5: | US $1.53010 | US $1.37709 | US $6.88545 |
| ≥10: | US $1.37709 | US $1.23938 | US $12.39380 |
| ≥20: | US $1.33884 | US $1.20496 | US $24.09920 |
| ≥50: | US $1.30058 | US $1.17052 | US $58.52600 |
| ≥100: | US $1.26233 | US $1.13610 | US $113.61000 |
| ≥200: | US $1.22408 | US $1.10167 | US $220.33400 |
| ≥500: | US $1.20878 | US $1.08790 | US $543.95000 |
| ≥1000: | US $1.18583 | US $1.06725 | US $1067.25000 |
Substitute (equivalent) Product
| Product Name | Description |
|---|---|
| MM74HC923 | High-speed CMOS BCD-to-7-segment latch/decoder/driver with active-low reset and active-low lamp test inputs. |
| MM74HCT923 | High-speed CMOS BCD-to-7-segment latch/decoder/driver with active-low reset and active-low lamp test inputs, TTL compatible. |
| SN74HC923 | High-speed CMOS BCD-to-7-segment latch/decoder/driver with active-low reset and active-low lamp test inputs. |
| SN74HCT923 | High-speed CMOS BCD-to-7-segment latch/decoder/driver with active-low reset and active-low lamp test inputs, TTL compatible. |
Product Usage
The MM74C923N is a 10-bit to 4-digit BCD (Binary-Coded Decimal) decoder/driver, commonly used in digital display applications. It converts a 10-bit binary input into a 4-digit BCD output, which can then be used to drive 7-segment displays or other types of numeric displays.
Here are some typical circuits and applications where the MM74C923N might be used:
Digital Clocks:
Counters:
Frequency Counters:
Odometers and Speedometers:
Test Equipment:
Thermometers:
Industrial Control Panels:
Educational Kits:
Here is a basic example of how the MM74C923N might be used in a circuit to drive a 7-segment display:
Input Signal:
Power Supply:
Output to Display:
7-Segment Display:
Required+5V
|
|--- Vcc (Pin 16 of MM74C923N)
|
|--- Vcc (Pin 16 of 7447)
|
|--- GND (Pin 8 of MM74C923N)
|--- GND (Pin 8 of 7447)
|
|--- GND (Common cathode of 7-segment display)
|
+5V ---[10-bit Binary Input]--- (Pins 1-10 of MM74C923N)
|
|--- (BCD Output Pins 11-14 of MM74C923N) --- (BCD Input Pins 1-4 of 7447)
|
|--- (Segment Outputs A-G of 7447) --- (Segments A-G of 7-segment display)
This is a simplified example, and actual implementations may require additional components for debouncing, filtering, and driving higher current loads.
Global Logistics Country List
| Flag | Country | Estimated Delivery Time | Minimum First Weight Cost | ||
|---|---|---|---|---|---|
| Express | Standard Shipping | Express (0.5kg) | Standard Shipping (0.05kg) | ||
ExpandOrder
Payment
Shipping
Gift Coupon/Plus service
Returning
Returns are normally accepted when completed within 90 days from the date of the parcel delivered.
Defective ( Please provide a third party quality report of nonconforming products)
Return Freight charges must be prepaid; we will not accept COD shipments.
Warranty
All UTSOURCE purchases have a 90 days money back return policy, plus a 100 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
MM74C923N
MM74C923N has several brands around the world that may have alternate names for MM74C923N due to regional differences or acquisition. MM74C923N may also be known as the following names:
ExpandBUYING OPTIONS
Stock Status: 10000
Minimum: 2
Total Price:
Free shipping on first 0.5kg for orders over US $300.00（Except the United States）
Express: Estimated arrival {0}
Standard delivery: Estimated arrival {0}
Country:
United States
Express:(FEDEX, UPS, DHL, TNT)Free shipping on first 0.5kg for orders over 300$,Overweight will be charged separately（Except the United States）
UTSOURCE
{{pro.Parameter.Brand}}
{{pro.encapsulation}}
{{pro.Parameter.DateCode}}
{{pro.brief}}
Minimum:{{pro.BuyQuantity}}
Standard delivery
Express: Estimated arrival {0}
Standard delivery: Estimated arrival {0}
Stop production experts, we can provide a large number of electronic components that have been stopped production and are difficult to find, to facilitate the maintenance company
Stock
Reply to
submitToll-Free Call
(888) 766 5577 USA & Canada
+52 5515436027
+52 5515436028 Mexico
+49 6931090199 Germany
GLOBAL PAYMENTS
Global logistics
