28C04A データシートの表示（PDF） - Microchip Technology
部品番号
コンポーネント説明
メーカー
28C04A Datasheet PDF : 10 Pages
| |||
28C04A
TABLE 1-4: BYTE WRITE AC CHARACTERISTICS
AC Testing Waveform:
Output Load:
Input Rise/Fall Times:
Ambient Temperature:
VIH = 2.4V; VIL = 0.45V; VOH = 2.0V; VOL = 0.8V
1 TTL Load + 100 pF
20 nsec
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
tAS
10
ns
Address Hold Time
tAH
50
ns
Data Set-Up Time
tDS
50
ns
Data Hold Time
tDH
10
ns
Write Pulse Width
tWPL
100
ns Note 1
Write Pulse High Time
tWPH
50
ns
OE Hold Time
tOEH
10
ns
OE Set-Up Time
tOES
10
ns
Data Valid Time
tDV
1000
ns Note 2
Write Cycle Time (28C04A)
tWC
1
ms 0.5 ms typical
Write Cycle Time (28C04AF)
tWC
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.
2: Data must be valid within 1000ns max. after a write cycle is initiated and must be stable at least until tDH
after the positive edge of WE or CE, whichever occurs first.
FIGURE 1-2: PROGRAMMING WAVEFORMS
VIH
Address
VIL
VIH
CE, WE
VIL
VIH
Data In
VIL
VIH
OE
VIL
t AS
t AH
t WPL
t DV
t DS
t OES
t DH
t OEH
DS11126H-page 4
2004 Microchip Technology Inc.
Share Link: 