参数资料
型号: DS87C520-WCL
厂商: Maxim Integrated Products
文件页数: 26/43页
文件大小: 0K
描述: IC MCU EPROM/ROM 33MHZ HS 40CDIP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 10
系列: 87C
核心处理器: 8051
芯体尺寸: 8-位
速度: 33MHz
连通性: EBI/EMI,SIO,UART/USART
外围设备: 电源故障复位,WDT
输入/输出数: 32
程序存储器容量: 16KB(16K x 8)
程序存储器类型: EPROM,UV
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振荡器型: 外部
工作温度: 0°C ~ 70°C
封装/外壳: 40-CDIP(0.600",15.24mm)窗口
包装: 管件
其它名称: DS87C520WCL
DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers
32 of 43
AC ELECTRICAL CHARACTERISTICS (Note 1)
33 MHz
VARIABLE CLOCK
PARAMETER
SYMBOL
MIN
MAX
MIN
MAX
UNITS
External Oscillator
0
33
0
33
Oscillator
Frequency
External Crystal
1/tCLCL
1
33
1
33
MHz
ALE Pulse Width
tLHLL
40
1.5tCLCL-5
ns
Port 0 Address Valid to ALE Low
tAVLL
10
0.5tCLCL-5
ns
Address Hold after ALE Low
tLLAX1
(Note 2)
ns
ALE Low to Valid Instruction In
tLLIV
43
2.5tCLCL-33
ns
ALE Low to PSEN Low
tLLPL
4
0.5tCLCL-11
ns
PSEN
Pulse Width
tPLPH
55
2tCLCL-5
ns
PSEN
Low to Valid Instruction In
tPLIV
37
2tCLCL-24
ns
Input Instruction Hold after PSEN
tPXIX
0
ns
Input Instruction Float after PSEN
tPXIZ
26
tCLCL-5
ns
Port 0 Address to Valid Instruction In
tAVIV1
59
3tCLCL-32
ns
Port 2 Address to Valid Instruction In
tAVIV2
68
3.5tCLCL-38
ns
PSEN
Low to Address Float
tPLAZ
(Note 2)
ns
Note 1:
All parameters apply to both commercial and industrial temperature range operation unless otherwise noted.
Specifications to -40°C are guaranteed by design and are not production tested. AC electrical characteristics are not
100% tested, but are characterized and guaranteed by design. All signals characterized with load capacitance of 80pF
except Port 0, ALE,
PSEN, RD, and WR with 100pF. Interfacing to memory devices with float times (turn off times)
over 25ns may cause contention. This will not damage the parts, but will cause an increase in operating current.
Specifications assume a 50% duty cycle for the oscillator. Port 2 and ALE timing will change in relation to duty cycle
variation.
Note 2:
Address is driven strongly until ALE falls, and is then held in a weak latch until overdriven externally.
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