MM74C922WMX_NL Fairchild Semiconductor, MM74C922WMX_NL Datasheet - Page 7
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MM74C922WMX_NL
Manufacturer Part Number
MM74C922WMX_NL
Description
Manufacturer
Fairchild Semiconductor
Datasheet
1.MM74C922WMX_NL.pdf
(11 pages)
Specifications of MM74C922WMX_NL
Cascading Capability
No
Logic Family
74C
Number Of Inputs
1
Number Of Outputs
4
Number Of Encoded Keys
16
Abs. Propagation Delay Time
250ns
Operating Supply Voltage (max)
15V
Operating Supply Voltage (typ)
3.3/5/9/12V
Operating Supply Voltage (min)
3V
Lead Free Status / RoHS Status
Compliant
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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