mm74c923wmx-nl Fairchild Semiconductor, mm74c923wmx-nl Datasheet - Page 7

• Manufacturer Part Number: mm74c923wmx-nl
• Description: Mm74c922 * Mm74c923 16-key Encoder * 20-key Encoder
• Manufacturer: Fairchild Semiconductor

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
www.fairchildsemi.com
KBM