Datasheet > M27C405-100B6

M27C405-100B6

更新时间： 2023-01-02 16:52:29

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		可编程只读存储器光电二极管
页数	文件大小	规格书
14页	147K
描述
512KX8 OTPROM, 100ns, PDIP32, 0.600 INCH, PLASTIC, DIP-32

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M27C405-100B6 数据手册

M27C405

Table 5. AC Measurement Conditions

High Speed

≤ 10ns

Standard

≤ 20ns

Input Rise and Fall Times

Input Pulse Voltages

0 to 3V

1.5V

0.4V to 2.4V

0.8V and 2V

Input and Output Timing Ref. Voltages

Figure 3. AC Testing Input Output Waveform

Figure 4. AC Testing Load Circuit

1.3V

High Speed

1N914

1.5V

3.3kΩ

DEVICE

UNDER

TEST

OUT

Standard

2.4V

2.0V

0.8V

0.4V

= 30pF for High Speed

= 100pF for Standard

includes JIG capacitance

AI01822

AI01823B

(1)

Table 6. Capacitance

Symbol

(T = 25 °C, f = 1 MHz)

Parameter

Test Condition

Min

Max

Unit

= 0V

Input Capacitance

Output Capacitance

OUT

Note: 1. Sampled only, not 100% tested.

DEVICE OPERATION

dresses are stable, the address access time

of t

) is equal to the delay from E to output

). Data is available at the output after a delay

AVQV

ELQV

The modes of operations of the M27C405 are list-

ed in the Operating Modes table. A single power

supply is required in the read mode. All inputs are

TTL levels except for V and 12V on A9 for Elec-

tronic Signature.

from the falling edge of G, assuming that

GLQV

E has been low and the addresses have been sta-

ble for at least t

-t

AVQV GLQV

Standby Mode

Read Mode

The M27C405 has a standby mode which reduces

the active current from 30mA to 100µA. The

M27C405 is placed in the standby mode by apply-

ing a CMOS high signal to the E input. When in the

standby mode, the outputs are in a high imped-

ance state, independent of the G input.

The M27C405 has two control functions, both of

which must be logically active 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, indepen-

dent of device selection. Assuming that the ad-

4/14

1 2 345 6 7...14

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