Electronic Components Datasheet Search |
|
W27E040 Datasheet(PDF) 3 Page - Winbond |
|
W27E040 Datasheet(HTML) 3 Page - Winbond |
3 / 15 page W27E040 Publication Release Date: May 1997 - 3 - Revision A1 Standby Mode The standby mode significantly reduces VCC current. This mode is entered when CE = VIH, VPP = 5V, and VCC = 5V. In standby mode, all outputs are in a high impedance state, independent of OE . Two-line Output Control Since EPROMs are often used in large memory arrays, the W27E040 provides two control inputs for multiple memory connections. Two-line control provides for lowest possible memory power dissipation and ensures that data bus contention will not occur. System Considerations EPROM power switching characteristics require careful device decoupling. System designers are interested in three supply current issues: standby current levels (ISB), active current levels (ICC), and transient current peaks produced by the falling and rising edges of CE. Transient current magnitudes depend on the device output's capacitive and inductive loading. Two-line control and proper decoupling capacitor selection will suppress transient voltage peaks. Each device should have a 0.1 µ F ceramic capacitor connected between its VCC and GND. This high frequency, low inherent- inductance capacitor should be placed as close as possible to the device. Additionally, for every eight devices, a 4.7 µF electrolytic capacitor should be placed at the array's power supply connection between VCC and GND. The bulk capacitor will overcome voltage slumps caused by PC board trace inductances. TABLE OF OPERATING MODES (VPP = 12V, VPE = 14V, VHH = 12V, VCP = 5V, X = VIH or VIL) MODE PINS CE OE A0 A9 VCC VPP OUTPUTS Read VIL VIL X X VCC VCC DOUT Output Disable VIL VIH X X VCC VCC High Z Standby (TTL) VIH X X X VCC VCC High Z Standby (CMOS) VCC ±0.3V X X X VCC VCC High Z Program VIL VIH X X VCP VPP DIN Program Verify VIH VIL X X VCP VPP DOUT Program Inhibit VIH X X X VCP VPP High Z Erase VIL VIH VIL VPE VCE VPE DIH Erase Verify VIH VIL X X VCE VPE DOUT Erase Inhibit VIH X X X VCE VPE High Z Product Identifier-manufacturer VIL VIL VIL VHH VCC VCC DA (Hex) Product Identifier-device VIL VIL VIH VHH VCC VCC 86 (Hex) |
Similar Part No. - W27E040 |
|
Similar Description - W27E040 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |