MM74C923N Fairchild Semiconductor, MM74C923N Datasheet - Page 7
MM74C923N
Manufacturer Part Number
MM74C923N
Description
IC ENCODER 20-KEY 20-DIP
Manufacturer
Fairchild Semiconductor
Series
74Cr
Type
20-Key Encoderr
Datasheet
1.MM74C923WM.pdf
(11 pages)
Specifications of MM74C923N
Circuit
1 x 9:4
Independent Circuits
1
Current - Output High, Low
15mA, 16mA
Voltage Supply Source
Single Supply
Voltage - Supply
3 V ~ 15 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Through Hole
Package / Case
20-DIP (0.300", 7.62mm)
Product
Decoders, Encoders, Multiplexers & Demultiplexers
Logic Family
74C
Number Of Bits
4
Number Of Lines (input / Output)
8.0 / 5.0
Propagation Delay Time
150 ns at 5 V, 80 ns at 10 V, 60 ns at 15 V
Supply Voltage (max)
15 V
Supply Voltage (min)
3 V
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 55 C
Mounting Style
Through Hole
Number Of Input Lines
8.0
Number Of Output Lines
5.0
Power Dissipation
700 mW
Applications
Switches, Keyboard
Logic Type
Key Encoder
No. Of Outputs
4
Supply Voltage Range
3V To 15V
Logic Case Style
DIP
No. Of Pins
20
Operating Temperature Range
-40°C To +85°C
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
74C923
74C923N
74C923N
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Typical Performance Characteristics
Typical Applications
The keyboard may be synchronously scanned by omitting the capacitor at
osc. and driving osc. directly if the system clock rate is lower than 10 kHz
Synchronous Handshake (MM74C922)
Typical I
Typical F
rp
vs V
SCAN
IN
at Any Y Input
vs C
OSC
7
Outputs are enabled when valid entry is made and go into 3-STATE when
key is released.
The keyboard may be synchronously scanned by omitting the capacitor at
osc. and driving osc. directly if the system clock rate is lower than 10 kHz
Synchronous Data Entry Onto Bus (MM74C922)
Typical R
Typical Debounce Period vs C
on
vs V
OUT
at Any X Output
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