HT27LC020 Ver la hoja de datos (PDF) - Holtek Semiconductor

Número de pieza

componentes Descripción

Fabricante

HT27LC020

CMOS 256K x
8-Bit OTP EPROM

Holtek Semiconductor 

Rev. 1.50

V IH

A d d re s s

V IL

V IH

D a ta

V IL

6 .0 V

VCC

5 .0 V

1 2 .5 V

VPP

5 .0 V

V IH

CE

V IL

V IH

PG M

V IL

V IH

OE

V IL

P ro g ra m

R ead

( V e r ify )

A d d r e s s S ta b le

tA S

D a ta In

tD S

tO E

tA H

D a ta O u t

V a lid

tD H

tD . P

tV C S

tV P S

tP R T

tC E S

tP W

tO E S

Figure 2. Programming Waveforms

In te r a c tiv e

S e c tio n

STAR T

A d d r e s s = . ir s t L o c a tio n

V C C = 6 .0 V

V P P = 1 2 .5 V

X =0

P r o g r a m o n e 7 5 s P u ls e

In c re m e n t X

V e r ify

S e c tio n

Y es

X =25?

No

. a il

V e r ify

B y te ?

P ass

In c re m e n t A d d re s s

No

Last

A d d re s s

. a il

Y es

V C C = V P P = 3 .3 V

V e r ify a ll

B y te s ?

. a il

D e v ic e . a ile d

P ass

D e v ic e P a s s e d

N o te : E ith e r 1 0 5 s o r 3 0 s p u ls e .

Figure 3. Fast Programming Flowchart

7

HT27LC020

December 8, 2003

Share Link: