- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄4039 > MC7457VG867NC (Freescale Semiconductor)IC MPU RISC 867MHZ 483FCCBGA PDF資料下載
參數(shù)資料
| 型號： | MC7457VG867NC |
| 廠商： | Freescale Semiconductor |
| 文件頁數(shù)： | 51/71頁 |
| 文件大小： | 0K |
| 描述： | IC MPU RISC 867MHZ 483FCCBGA |
| 標(biāo)準(zhǔn)包裝： | 36 |
| 系列： | MPC74xx |
| 處理器類型： | 32-位 MPC74xx PowerPC |
| 速度： | 867MHz |
| 電壓： | 1.1V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 483-BCBGA，F(xiàn)CCBGA |
| 供應(yīng)商設(shè)備封裝： | 483-FCCBGA（29x29） |
| 包裝： | 托盤 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁當(dāng)前第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁
System Design Information
MPC7457 RISC Microprocessor Hardware Specifications, Rev. 8
Freescale Semiconductor
55
response time necessary. They should also be connected to the power and ground planes through two vias
to minimize inductance. Suggested bulk capacitors: 100–330 F (AVX TPS tantalum or Sanyo OSCON).
9.4
Connection Recommendations
To ensure reliable operation, it is highly recommended to connect unused inputs to an appropriate signal
level. Unused active low inputs should be tied to OVDD. Unused active high inputs should be connected
to GND. All NC (no-connect) signals must remain unconnected.
Power and ground connections must be made to all external VDD, OVDD, GVDD, and GND pins in the
MPC7457. If the L3 interface is not used, GVDD should be connected to the OVDD power plane, and
L3VSEL should be connected to BVSEL; the remainder of the L3 interface may be left unterminated.
9.5
Output Buffer DC Impedance
The MPC7457 processor bus and L3 I/O drivers are characterized over process, voltage, and temperature.
To measure Z0, an external resistor is connected from the chip pad to OVDD or GND. Then, the value of
The output impedance is the average of two components, the resistances of the pull-up and pull-down
devices. When data is held low, SW2 is closed (SW1 is open), and RN is trimmed until the voltage at the
pad equals OVDD/2. RN then becomes the resistance of the pull-down devices. When data is held high,
SW1 is closed (SW2 is open), and RP is trimmed until the voltage at the pad equals OVDD/2. RP then
becomes the resistance of the pull-up devices. RP and RN are designed to be close to each other in value.
Then, Z0 = (RP + RN)/2.
Figure 25. Driver Impedance Measurement
Table 21 summarizes the signal impedance results. The impedance increases with junction temperature
and is relatively unaffected by bus voltage.
OVDD
OGND
RP
RN
Pad
Data
SW1
SW2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ACB106DHBS-S621 | EDGECARD 212POS DIP R/A .050 SLD |
| FMC36DRAI | CONN EDGECARD 72POS R/A .100 SLD |
| FMC49DRXN | CONN EDGECARD 98POS DIP .100 SLD |
| FMC49DRXH | CONN EDGECARD 98POS DIP .100 SLD |
| ABB106DHAT-S621 | CONN EDGECARD 212PS R/A .050 SLD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC74A5-33SNTR | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| MC74A5-50T | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| MC74AC00 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:QUAD 2-INPUT NAND GATE |
| MC74AC00D | 功能描述:邏輯門 2-6V Quad 2-Input RoHS:否 制造商:Texas Instruments 產(chǎn)品:OR 邏輯系列:LVC 柵極數(shù)量:2 線路數(shù)量（輸入/輸出）:2 / 1 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 傳播延遲時(shí)間:3.8 ns 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DCU-8 封裝:Reel |
| MC74AC00DG | 功能描述:邏輯門 2-6V Quad 2-Input NAND RoHS:否 制造商:Texas Instruments 產(chǎn)品:OR 邏輯系列:LVC 柵極數(shù)量:2 線路數(shù)量（輸入/輸出）:2 / 1 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 傳播延遲時(shí)間:3.8 ns 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DCU-8 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。