数据搜索系统,热门电子元器件搜索 |
|
M2732A-25F1 数据表(PDF) 2 Page - STMicroelectronics |
|
M2732A-25F1 数据表(HTML) 2 Page - STMicroelectronics |
2 / 9 page Q2 VSS A3 A0 Q0 Q1 A2 A1 GVPP Q5 A10 E Q3 A11 Q7 Q6 Q4 A4 VCC A7 AI00781 M2732A 8 1 2 3 4 5 6 7 9 10 11 12 20 19 18 17 16 15 A6 A5 A9 A8 23 22 21 14 13 24 Figure 2. DIP Pin Connections Symbol Parameter Value Unit TA Ambient Operating Temperature grade 1 grade 6 0 to 70 –40 to 85 °C TBIAS Temperature Under Bias grade 1 grade 6 –10 to 80 –50 to 95 °C TSTG Storage Temperature –65 to 125 °C VIO Input or Output Voltages –0.6 to 6 V VCC Supply Voltage –0.6 to 6 V VPP Program Supply Voltage –0.6 to 22 V Note: Except for the rating "Operating Temperature Range", stresses above those listed in the Table "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the SGS-THOMSON SURE Program and other relevant quality documents. Table 2. Absolute Maximum Ratings DEVICE OPERATION The six modes of operation for the M2732A are listed in the Operating Modes Table. A single 5V power supply is required in the read mode. All inputs are TTL level except for VPP. Read Mode The M2732A has two control functions, both of which must be logically satisfied in order to obtain data at the outputs. Chip Enable (E) is the power control and should be used for device selection. Output Enable (G) is the output control and should be used to gate data to the output pins, inde- pendent of device selection. Assuming that the addresses are stable, address access time (tAVAQ) is equal to the delay from E to output (tELQV). Data is available at the outputs after the falling edge of G, assuming that E has been low and the addresses have been stable for at least tAVQV-tGLQV. Standby Mode The M2732A has a standby mode which reduces the active power current by 70 %, from 125 mA to 35 mA. The M2732A is placed in the standby mode by applying a TTL high signal to E input. When in standby mode, the outputs are in a high impedance state, independent of the GVPP input. Two Line Output Control Because M2732A’s are usually used in larger mem- ory arrays, this product features a 2 line control function which accommodates the use of multiple memory connection. The two line control function allows: a. the lowest possible memory power dissipation, b. complete assurance that output bus contention will not occur. To most efficiently use these two control lines, it is recommended that E be decoded and used as the primary device selecting function, while G should be made a common connection to all devices in the array and connected to the READ line from the system control bus. This ensures that all deselected memory devices are in their low power standby mode and that the output pins are only active when data is required from a particular memory device. 2/9 M2732A |
类似零件编号 - M2732A-25F1 |
|
类似说明 - M2732A-25F1 |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |