MT8920 查看數據表（PDF） - Mitel Networks
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MT8920 Datasheet PDF : 24 Pages
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MT8920B CMOS
AC Electrical Characteristics† - Mode 3 Timing (see Fig.17, 18 and 19)
((VCC=5.0V ±5%,TA=-40 to 85°C)
Characteristics
Sym Min Typ‡ Max Units
Test Conditions
1 CS to OE, WE, Address Enabled
2 C4i Low to Address Change
3 CS to OE, WE, Address Disabled
4 C4i Low to Output Enable Low
5 C4i Low to Output Enable High
6 OE, WE, Pulse Width
7 C4i Low to Write Enable Low
8 C4i Low to Write Enable High
9 Read Data Valid from OE
tZR
tACS
tRZ
tOED
tOEH
tENPW
tWED
tWEH
tRST
50
ns Load A, CL = 130pF, RL = 740Ω
110
ns Load A, CL = 130pF, RL = 740Ω
50
ns Load A, CL = 130pF, RL = 740Ω
75
ns Load A, CL = 130pF, RL = 740Ω
75
ns Load A, CL = 130pF, RL = 740Ω
2*tCLK
ns Load A, CL = 130pF, RL = 740Ω
75
ns Load A, CL = 130pF, RL = 740Ω
75
ns Load A, CL = 130pF, RL = 740Ω
(2*tCLK) ns
-60
10 Read Data Hold Time
tRHT
0
ns
11 Write Data Setup Time
tWST 70 100
ns Load A, CL = 130pF, RL = 740Ω
12 Write Data Hold Time
tWHT 70 100
ns Load A, CL = 130pF, RL = 740Ω
13 C4i Transition to STCH, DCS Trans. tSTC
120
ns Load A, CL = 70pF, RL = 1.22KΩ
14 STCH Pulse Width
tSCPW
1830
ns Load A, CL = 70pF, RL = 1.22KΩ
15 DCS Pulse Width
tCSPW
1830
ns Load A, CL = 70pF, RL = 1.22KΩ
† Timing is over recommended temperature & power supply voltages.
‡ Typical figures are at 25°C, VDD=5V,tCLK=244ns, tCH=tCL=122ns and are for design aid only: not guaranteed and not subject to production
testing.
BIT 7 (BIT 3)
CHANNEL N
BIT 6 (BIT 2)
BIT 5 (BIT 1)
BIT 4 (BIT 0)
C4i
A4 - A0
tACS
OE
WE
D7 - D0
tZR
CS
N+1
tOED
tENPW
tOEH
N-1
tWED
tWEH
tRST
DATA IN
tRHT
tWST
tENPW
tWHT
DATA OUT
tRZ
Figure 17 - Mode 3 Timing Diagram
3-22
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