28C04A

DS11126F-page 4

© 1996 Microchip Technology Inc.

TABLE 1-4:

BYTE WRITE AC CHARACTERISTICS

FIGURE 1-2:

PROGRAMMING WAVEFORMS

AC Testing Waveform:

Output Load:

1 TTL Load + 100 pF

Input Rise/Fall Times:

20 nsec

Ambient Temperature:

Commercial (C): Tamb= 0˚C to 70˚C

Industrial

(I):

Tamb= -40˚C to 85˚C

Parameter

Symbol

Min

Max

Units

Remarks

Address Set-Up Time

10

ns

Address Hold Time

50

ns

Data Set-Up Time

50

ns

Data Hold Time

10

ns

Write Pulse Width

100

ns

Note 1

Write Pulse High Time

50

ns

OE Hold Time

10

ns

OE Set-Up Time

10

ns

Data Valid Time

1000

ns

Note 2

Write Cycle Time (28C04A)

1

ms

0.5 ms typical

Write Cycle Time (28C04AF)

200

µs

100

µs typical

Note 1: A write cycle can be initiated be CE or WE going low, whichever occurs last. The data is latched on the pos-

itive edge of CE or WE, whichever occurs first.

the positive edge of WE or CE, whichever occurs first.

Address

CE, WE

Data In

OE