參數(shù)資料
型號(hào)： MSM80C88A-10JS
廠商： OKI ELECTRIC INDUSTRY CO LTD
元件分類(lèi)： 微控制器/微處理器
英文描述： 8-BIT, 10 MHz, MICROPROCESSOR, PQCC44
封裝： 0.650 X 0.650 INCH, 1.27 MM PITCH, PLASTIC, QFJ-44
文件頁(yè)數(shù)： 18/37頁(yè)
文件大?。?/td> 267K
代理商： MSM80C88A-10JS
25/37
Semiconductor
MSM80C88A-10RS/GS/JS
BUS HOLD CIRCUITRY
To avoid high current conditions caused by floating inputs to CMOS devices, and to eliminate
the need for pull-up/down resistors, “bus-hold” circuitry has been used on MSM80C88A-10
pins 2-16, 26-32, and 34-39 (Figures 6a, 6b). These circuits will maintain the last valid logic state
if no driving source is present (i.e. an unconnected pin or a driving source which goes to a high
impedance state). To overdrive the “bus hold” circuits, an external driver must be capable of
supplying approximately 400 mA minimum sink or source current at valid input voltage levels.
Since this “bus hold” circuitry is active and not a “resistive” type element, the associated power
supply current is negligible and power dissipation is significantly reduced when compared to
the use of passive pull-up resistors.
Input Buffer exists only on I/O pins
"Pull-Up/Pull-Down"
Input
Protection
Circuitry
Input
Buffer
Output
Driver
Bond
Pad
External
Pin
Figure 6a. Bus Hold Circuitry Pin 2-16, 35-39
Input Buffer exists only on I/O pins
PCC
Input
Protection
Circuitry
Input
Buffer
Output
Driver
Bond
Pad
External
Pin
"Pull-Up"
P
Figure 6b. Bus Hold Circuit Pin 26-32, 34
相關(guān)PDF資料
PDF描述
MSM80C88A-10GS-K 8-BIT, 10 MHz, MICROPROCESSOR, PQFP56
MSM81C55-5GS-2K 22 I/O, PIA-GENERAL PURPOSE, PQFP44
MSM82C51A-2GS-VK 1 CHANNEL(S), 64K bps, SERIAL COMM CONTROLLER, PDSO32
MSM82C51A-2JS 1 CHANNEL(S), 64K bps, SERIAL COMM CONTROLLER, PQCC28
MSM82C51A-2GS-K 1 CHANNEL(S), 64K bps, SERIAL COMM CONTROLLER, PDSO32
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MSM80C88A-10RS 制造商:OKI 制造商全稱(chēng):OKI electronic componets 功能描述:8-Bit CMOS MICROPROCESSOR
MSM80C88A2JS 制造商:OKI 功能描述:*
MSM8128 制造商:MOSAIC 制造商全稱(chēng):MOSAIC 功能描述:128K x 8 SRAM
MSM8128V-10 制造商:MOSAIC 制造商全稱(chēng):MOSAIC 功能描述:128K x 8 SRAM
MSM8128V-12 制造商:MOSAIC 制造商全稱(chēng):MOSAIC 功能描述:128K x 8 SRAM
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