器件名称: W27E520
功能描述: 64K X 8 ELECTRICALLY ERASABLE EPROM
文件大小: 234.66KB 共16页
简 介:W27E520 64K × 8 ELECTRICALLY ERASABLE EPROM
GENERAL DESCRIPTION
The W27E520 is a high speed, low power Electrically Erasable and Programmable Read Only Memory organized as 65,536 × 8 bits. It includes latches for the lower 8 address lines to multiplex with the 8 data lines. To cooperate with the MCU, this device could save the external TTL component, also cost and space. It requires only one supply in the range of 4.5V to 5.5V in normal read mode. The W27E520 provides an electrical chip erase function. It will be a great convenient when you need to change/update the contents in the device.
FEATURES
High speed access time: 70/90 nS (max.) Read operating current: 20 mA (max.) Erase/Programming operating current High Reliability CMOS Technology
30 mA (max.) Standby current: 100 A (max.) Unregulated battery power supply range, 4.5V to 5.5V +13V erase and programming voltage
2K V ESD Protection 200 mA Latchup Immunity Fully static operation All inputs and outputs directly TTL/CMOS compatible Three-state outputs Available packages: 20-pin TSSOP and 20-pin SOP
PIN CONFIGURATIONS
A10 A12 A14 ALE VDD OE/VPP A15 A13 A11 A9
1 2 3 4 5 6 7 8 9 10 20 19 18 17
BLOCK DIAGRAM
A8 AD1 AD3 AD5 AD7 GND AD6 AD4 AD2 AD0
VDD GND A15 - A8 AD7 - AD0
L A T C H E S
ALE OE / VPP
CONTROL
OUTPUT BUFFER
TSSOP 16 Top View
15 14 13 12
DECODER
MEMORY ARRAY
11
OE/VPP A15 A13 A11 A9 AD0 AD2 AD4 AD6 GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17
VDD ALE A14 A12 A10 A8 AD1 AD3 AD5 AD7
PIN DES……
