參數(shù)資料
型號： SC87C51AGN40
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： CMOS single-chip 8-bit microcontrollers
中文描述： 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP40
文件頁數(shù)： 13/30頁
文件大?。?/td> 411K
代理商： SC87C51AGN40
Philips Semiconductors
Product specification
80C31/80C51/87C51
CMOS single-chip 8-bit microcontrollers
1996 Aug 16
13
AC ELECTRICAL CHARACTERISTICS FOR SC87C51 12–33MHz PHILIPS NORTH AMERICA DEVICES
T
amb
= 0
°
C to +70
°
C or –40
°
C to +85
°
C, V
CC
= 5V
±
10%, V
SS
= 0V (SC87C51 12, 16 and 24MHz versions);
For SC87C51 (33MHz only) T
amb
= = 0
°
C to +70
°
C, V
CC
= 5V
±
5%
VARIABLE CLOCK
3
SYMBOL
FIGURE
PARAMETER
MIN
MAX
UNIT
1/t
CLCL
Oscillator frequency:
Speed Versions
SC87C51
C
G
P
Y
3.5
3.5
3.5
3.5
12
16
24
33
MHz
MHz
MHz
MHz
t
LHLL
1
ALE pulse width
2t
CLCL
–40
ns
t
AVLL
1
Address valid to ALE low
t
CLCL
–13
ns
t
LLAX
1
Address hold after ALE low
t
CLCL
–20
ns
t
LLIV
1
ALE low to valid instruction in
4t
CLCL
–65
ns
t
LLPL
1
ALE low to PSEN low
t
CLCL
–13
ns
t
PLPH
1
PSEN pulse width
3t
CLCL
–20
ns
t
PLIV
1
PSEN low to valid instruction in
3t
CLCL
–45
ns
t
PXIX
1
Input instruction hold after PSEN
0
ns
t
PXIZ
1
Input instruction float after PSEN
t
CLCL
–10
ns
t
AVIV
1
Address to valid instruction in
5t
CLCL
–55
ns
t
PLAZ
1
PSEN low to address float
10
ns
Data Memory
t
RLRH
2, 3
RD pulse width
6t
CLCL
–100
ns
t
WLWH
2, 3
WR pulse width
6t
CLCL
–100
ns
t
RLDV
2, 3
RD low to valid data in
5t
CLCL
–90
ns
t
RHDX
2, 3
Data hold after RD
0
ns
t
RHDZ
2, 3
Data float after RD
2t
CLCL
–28
ns
t
LLDV
2, 3
ALE low to valid data in
8t
CLCL
–150
ns
t
AVDV
2, 3
Address to valid data in
9t
CLCL
–165
ns
t
LLWL
2, 3
ALE low to RD or WR low
3t
CLCL
–50
3t
CLCL
+50
ns
t
AVWL
2, 3
Address valid to WR low or RD low
4t
CLCL
–75
ns
t
QVWX
2, 3
Data valid to WR transition
t
CLCL
–20
ns
t
WHQX
2, 3
Data hold after WR
t
CLCL
–20
ns
t
RLAZ
2, 3
RD low to address float
0
ns
t
WHLH
2, 3
RD or WR high to ALE high
t
CLCL
–20
t
CLCL
+25
ns
External Clock
t
CHCX
5
High time
12
ns
t
CLCX
5
Low time
12
ns
t
CLCH
5
Rise time
20
ns
t
CHCL
NOTES:
1. Parameters are valid over operating temperature range unless otherwise specified.
2. Load capacitance for port 0, ALE, and PSEN = 100pF, load capacitance for all other outputs = 80pF.
3. For all Philips North America speed versions only.
4. Interfacing the 87C51 to devices with float times up to 50ns is permitted. This limited bus contention will not cause damage to port 0 drivers.
5
Fall time
20
ns
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