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GMS90C51 Datasheet(PDF) 45 Page - Hynix Semiconductor

Part # GMS90C51
Description  8-BIT SINGLE-CHIP MICROCONTROLLERS
PDF  59 Pages
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Manufacturer  HYNIX [Hynix Semiconductor]
Direct Link  http://www.skhynix.com/kor/main.do
Logo HYNIX - Hynix Semiconductor

GMS90C51 Datasheet(HTML) 45 Page - Hynix Semiconductor

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GMS90 Series
Dec. 1998 Ver 3.0
41
AC Characteristics for GMS90 series (40MHz)
External Data Memory Characteristics
Advance Information (40MHz)
External Clock Drive
Parameter
Symbol
at 40 MHz Clock
Variable Clock
1/tCLCL = 3.5 to 40MHz
Unit
Min.
Max.
Min.
Max.
RD pulse width
tRLRH
120
-
6tCLCL-30
-
ns
WR pulse width
tWLWH
120
-
6tCLCL-30
-
ns
Address hold after ALE
tLLAX2
10
-
tCLCL-15
-
ns
RD to valid data in
tRLDV
-75
-
5tCLCL-50
ns
Data hold after RD
tRHDX
0-
0
-
ns
Data float after RD
tRHDZ
-38
-
2tCLCL-12
ns
ALE to valid data in
tLLDV
-150
-
8tCLCL-50
ns
Address to valid data in
tAVDV
-150
-
9tCLCL-75
ns
ALE to WR or RD
tLLWL
60
90
3tCLCL-15
3tCLCL+15
ns
Address valid to WR or RD
tAVWL
70
-
4tCLCL-30
-
ns
WR or RD high to ALE high
tWHLH
10
40
tCLCL-15
tCLCL+15
ns
Data valid to WR transition
tQVWX
5-
tCLCL-20
-
ns
Data setup before WR
tQVWH
125
-
7tCLCL-50
-
ns
Data hold after WR
tWHQX
5-
tCLCL-20
-
ns
Address float after RD
tRLAZ
-0
-
0
ns
Parameter
Symbol
Variable Oscillator
(Freq. = 3.5 to 40MHz)
Unit
Min.
Max.
Oscillator period
tCLCL
25
285.7
ns
High time
tCHCX
10
tCLCL - tCLCX
ns
Low time
tCLCX
10
tCLCL - tCHCX
ns
Rise time
tCLCH
-10
ns
Fall time
tCHCL
-10
ns



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