參數(shù)資料
型號(hào): MC145740F
廠(chǎng)商: MOTOROLA INC
元件分類(lèi): 信令電路
英文描述: Dual Tone Multiple Frequency Line Interface
中文描述: TELECOM, DTMF SIGNALING CIRCUIT, PDSO20
封裝: SOG-20
文件頁(yè)數(shù): 4/12頁(yè)
文件大?。?/td> 141K
代理商: MC145740F
MC145740
4
MOTOROLA
SWITCHING CHARACTERISTICS
(VCC = 5 V
±
10%, TA = – 20 to 70
°
C, See Figure 4)
Parameter
Symbol
Number
Min
Typ
Max
Unit
Pulse Width (H)
EN, SCK
twh
twl
tc
tr
tf
trec
tsu
1
50
ns
Pulse Width (L)
EN, SCK
2
50
ns
Clock Cycle
3
100
ns
Input Rise Time
4
2
μ
s
Input Fall Time
5
2
μ
s
Recovery Time
EN to SCK
6, 18
50
ns
Setup Time
DATA to SCK
7
50
ns
R/W Low to DATA
9
100
R/W High to DATA
12
50
Hold Time
SCK to DATA
th
8
50
ns
EN to R/W
10
50
DATA to R/W
14
50
R/W to DATA
15
50
Read Data Delay Time
EN to DATA
td
13
50
ns
SCK to DATA
17
50
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