參數(shù)資料
型號： DS87C550-QCL+
廠商： Maxim Integrated Products
文件頁數(shù)： 26/49頁
文件大?。?/td> 0K
描述： IC MCU EPROM ADC/PWM HS 68-PLCC
標(biāo)準(zhǔn)包裝： 18
系列： 87C
核心處理器： 8051
芯體尺寸： 8-位
速度： 33MHz
連通性： EBI/EMI，SIO，UART/USART
外圍設(shè)備： 電源故障復(fù)位，PWM，WDT
輸入/輸出數(shù)： 55
程序存儲(chǔ)器容量： 8KB（8K x 8）
程序存儲(chǔ)器類型： OTP
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 6x10b
振蕩器型： 外部
工作溫度： 0°C ~ 70°C
封裝/外殼： 68-LCC（J 形引線）
包裝： 管件
DS87C550 EPROM High-Speed Microcontroller with ADC and PWM
32 of 49
unprogrammed (FFh). Once the Encryption Array is programmed in a non-FFh state, the verify value will
be encrypted.
For encryption to be effective, the Encryption Array must be unknown to the party that is trying to verify
memory. The entire EPROM also should be a non-FFh state or the Encryption Array can be discovered.
The Encryption Array is programmed as shown in Table 10. Note that the programmer cannot read the
array. Also note that the verify operation always uses the Encryption Array. The array has no impact
while FFh. Simply programming the array to a non-FFh state will cause the encryption to function.
EPROM ERASURE CHARACTERISTICS
Erasure of the information stored in the DS87C550’s EPROM occurs when the isolated gate structure of
the EPROM stage element is exposed to certain wavelengths of light. While the gate structure is to some
degree sensitive to a wide range of wavelengths, it is mostly wavelengths shorter than approximately
4,000 angstroms that are most effective in erasing the EPROM. Since fluorescent lighting and sunlight
have wavelengths in this range, they can cause erasure if the device is exposed to them over an extended
period of time (weeks for sunlight, years in room-level fluorescent light). For this reason (and others
mentioned previously), it is recommended that an opaque covering be placed over the window of the -K
(windowed PLCC) package type.
For complete EPROM erasure, exposure to ultraviolet light at approximately 2537 angstroms to a dose of
15W-sec/cm2 at minimum is recommended. In practice, exposing the EPROM to an ultraviolet lamp of
12,000uW/cm2 rating for 20 to 39 minutes at a distance of approximately 1 inch will normally be
sufficient.
相關(guān)PDF資料
PDF描述
DS89C450-ENL IC MCU FLASH 64KB 33MHZ 44-TQFP
DS9034PCI IC SRAM NV TIMEKEEPING POWERCAP
DS9034PCX PCM W/CRYSTAL NV SRAM SNAP-ON
DS9092L+ IBUTTON PROBE PANEL MOUNT W/LED
DS9092T# IBTN PROBE W/TACTILE FEEDBACK
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS87C550-QCL+ 功能描述:IC MCU EPROM ADC/PWM HS 68-PLCC RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:87C 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C，智能卡，UART/USART，USB 外圍設(shè)備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲(chǔ)器容量:64KB（64K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件
DS87C550-QCW 制造商:Maxim Integrated Products 功能描述:DS87C550 WAIVERED FOR LS & MARKING - Rail/Tube
DS87C550-QNL 功能描述:IC MCU EPROM ADC/PWM HS 68-PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:87C 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C，智能卡，UART/USART，USB 外圍設(shè)備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲(chǔ)器容量:64KB（64K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件
DS88 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC
DS8800 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Voltage Level Translator
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*