M27C1001 datasheet(4/17 Pages) STMICROELECTRONICS

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M27C1001

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DEVICE OPERATION

The operating modes of the M27C1001 are listed

in the Operating Modes table. A single power sup-

ply is required in the read mode. All inputs are TTL

levels except for VPP and 12V on A9 for Electronic

Signature.

Read Mode

The M27C1001 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-

dresses are stable, the address access time

(tAVQV) is equal to the delay from E to output

(tELQV). Data is available at the output after a delay

of tGLQV from the falling edge of G, assuming that

E has been low and the addresses have been sta-

ble for at least tAVQV-tGLQV.

Standby Mode

The M27C1001 has a standby mode which reduc-

es the supply current from 30mA to 100µA. The

M27C1001 is placed in the standby mode by ap-

plying 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.

Table 5. AC Measurement Conditions

High Speed

Standard

Input Rise and Fall Times

≤ 10ns

≤ 20ns

Input Pulse Voltages

0 to 3V

0.4V to 2.4V

Input and Output Timing Ref. Voltages

1.5V

0.8V and 2V

Figure 3. AC Testing Input Output Waveform

AI01822

High Speed

1.5V

2.4V

Standard

0.4V

2.0V

0.8V

Figure 4. AC Testing Load Circuit

AI01823B

1.3V

OUT

CL = 30pF for High Speed

CL = 100pF for Standard

CL includes JIG capacitance

3.3k

Ω

1N914

DEVICE

UNDER

TEST

Table 6. Capacitance (1) (TA = 25 °C, f = 1 MHz)

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

Symbol

Parameter

Test Condition

Min

Max

Unit

CIN

Input Capacitance

VIN = 0V

6pF

COUT

Output Capacitance

VOUT = 0V

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