27C512A datasheet(5/12 Pages) MICROCHIP | 512K (64K x 8) CMOS EPROM

No. de pieza	27C512A

Descripción Electrónicos	512K (64K x 8) CMOS EPROM

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Fabricante Electrónico	MICROCHIP [Microchip Technology]

Página de inicio	http://www.microchip.com

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5 / 12 page

DS11173E-page 5

27C512A

FIGURE 1-2:

PROGRAMMING WAVEFORMS (1)

TABLE 1-6:

MODES

Operation Mode

CE

OE/VPP

A9

O0 - O7

Read

VIL

XDOUT

Program

VIL

VH

XDIN

Program Verify

VIL

XDOUT

Program Inhibit

VIH

VH

X

High Z

Standby

VIH

X

High Z

Output Disable

VIL

VIH

X

High Z

Identity

VIL

VH

Identity Code

X = Don’t Care

tOPW

tOEH

tCE

(2)

VIH

VIL

VIH

VIL

6.5 V (3)

5.0V

VIH

VIL

Address

Data

VCC

CE

Address Stable

tDS

tAS

Data In Stable

Data Out Valid

Verify

tVCS

Notes:

The input timing reference level is 0.8V for VIL and 2.0V for VIH.

tDF and tOE are characteristics of the device but must be accommodated by the programmer.

VCC = 6.5V

±0.25V, VPP = VH = 13.0V ±0.5V for express programming algorithm.

(1)

(2)

(3)

tDH

tOR

tDF

(2)

tAH

tPRT

tCES

tPW

tOES

13.0 V (3)

VIL

OE/V PP

Program

1.2

Read Mode

(See Timing Diagrams and AC Characteristics)

Read Mode is accessed when

a)

the CE pin is low to power up (enable) the chip

b)

the OE/VPP pin is low to gate the data to the

output pins

For Read operations, if the addresses are stable, the

address access time (tACC) is equal to the delay from

CE to output (tCE). Data is transferred to the output

after a delay (tOE) from the falling edge of OE/VPP.

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Descripción similar - 27C512A

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27C512A Datasheet(PDF) 5 Page - Microchip Technology

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