M2716 datasheet(2/9 Pages) STMICROELECTRONICS

2 / 9 page

VSS

A10

VPP

VCC

AI00785

M2716

Figure 2. DIP Pin Connections

Symbol

Parameter

Value

Unit

Ambient Operating Temperature

grade 1

grade 6

0 to 70

–40 to 85

°C

TBIAS

Temperature Under Bias

grade 1

grade 6

–10 to 80

–50 to 95

°C

TSTG

Storage Temperature

–65 to 125

°C

VCC

Supply Voltage

–0.3 to 6

VIO

Input or Output Voltages

–0.3 to 6

VPP

Program Supply

–0.3 to 26.5

Power Dissipation

1.5

Note: 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 ratings only 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 SGS-THOMSON SURE Program and other relevant quality documents.

Table 2. Absolute Maximum Ratings

DEVICE OPERATION

The M2716 has 3 modes of operation in the normal

system environment. These are shown in Table 3.

Read Mode. The M2716 read operation requires

that G = VIL, EP = VIL and that addresses A0-A10

have been stabilized. Valid data will appear on the

output pins after time tAVQV, tGLQV or tELQV (see

Switching Time Waveforms) depending on which is

limiting.

Deselect Mode. The M2716 is deselected by mak-

ing G = VIH. This mode is independent of EP and

the condition of the addresses. The outputs are

Hi-Z when G = VIH. This allows tied-OR of 2 or more

M2716’s for memory expansion.

Standby Mode (Power Down). The M2716 may

be powered down to the standby mode by making

EP = VIH. This is independent of G and automat-

ically puts the outputs in the Hi-Z state. The power

is reduced to 25% (132 mW max) of the normal

operating power. VCC and VPP must be maintained

at 5V. Access time at power up remains either tAVQV

or tELQV (see Switching Time Waveforms).

Programming

The M2716 is shipped from SGS-THOMSON com-

pletely erased. All bits will be at “1" level (output

high) in this initial state and after any full erasure.

Table 3 shows the 3 programming modes.

Program Mode. The M2716 is programmed by

introducing “0"s into the desired locations. This is

done 8 bits (a byte) at a time. Any individual address,

sequential addresses, or addresses chosen at ran-

dom may be programmed. Any or all of the 8 bits

associated with an address location may be pro-

grammed with a single program pulse applied to the

EP pin. All input voltage levels including the program

pulse on chip enable are TTL compatible.

The programming sequence is: with VPP = 25V, VCC

= 5V, G = VIH and EP = VIL, an address is selected

and the desired data word is applied to the output

pins (VIL = “0" and VIH = ”1" for both address and

data). After the address and data signals are stable

the program pin is pulsed from VIL to VIH with a

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