Datasheet > M27C405

M27C405

更新时间： 2022-12-29 00:29:25

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		可编程只读存储器电动程控只读存储器
页数	文件大小	规格书
15页	101K
描述
4 Mbit 512Kb x 8 OTP EPROM

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M27C405 数据手册

M27C405

Table 2. Absolute Maximum Ratings⁽¹⁾

Symbol

T_A

Parameter

Ambient Operating Temperature ⁽³⁾

Temperature Under Bias

Storage Temperature

Value

–40 to 125

–50 to 125

–65 to 150

–2 to 7

Unit

°C

T_BIAS

T_STG

°C

(2)

V_IO

Input or Output Voltages (except A9)

Supply Voltage

V_CC

–2 to 7

(2)

V_A9

A9 Voltage

–2 to 13.5

–2 to 14

V_PP

Program Supply Voltage

Notes: 1. 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 ratingsonly 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 STMicroelectronics SURE Program and other

relevant quality documents.

2. Minimum DC voltage on Input or Output is –0.5V with possible undershoot to –2.0V for a period less than 20ns. Maximum DC

voltage on Output is V_CC+0.5V with possible overshoot to V_CC+2V for a period less than 20ns.

3. Depends on range.

Table 3. Operating Modes

Mode

V_IL

V_PP

V_CCor V_SS

V_PP

Q0 - Q7

Data Out

Hi-Z

Read

V_IL

V_IH

V_IL

V_IH

Output Disable

Program

V_IL

_ILPulse

V_IH

Data In

Data Out

Hi-Z

Verify

V_PP

Program Inhibit

Standby

V_IH

V_PP

V_IH

V_CCor V_SS

V_CC

Hi-Z

Electronic Signature

V_IL

V_ID

Codes

Note: X = V_IHor V_IL, V_ID= 12V ± 0.5V

Table 4. Electronic Signature

Identifier

Manufacturer’s Code

Device Code

V_IL

V_IH

Hex Data

20h

B4h

Two Line Output Control

Forthe mostefficientuse of thesetwo controllines,

E should 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

controlbus. This ensures that all deselectedmem-

ory 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.

BecauseOTP EPROMs are usually used in larger

memory arrays, this product features a 2 line con-

trol function which accommodatesthe use of mul-

tiple memory connection. The two line control

functionallows:

a. the lowest possible memory power dissipation,

b. complete assurance that output bus contention

will not occur.

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