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27C256 データシート(PDF) 4 Page - Microchip Technology

部品番号 27C256
部品情報  256K (32K x 8) CMOS EPROM
PDF  10 Pages
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

27C256 データシート(HTML) 4 Page - Microchip Technology

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27C256
DS11001N-page 4
 2004 Microchip Technology Inc.
TABLE 1-4:
PROGRAMMING DC CHARACTERISTICS
TABLE 1-5:
PROGRAMMING AC CHARACTERISTICS
Ambient Temperature: Tamb = 25
°C ± 5°C
VCC = 6.5V
± 0.25V, VPP = VH = 13.0V ± 0.25V
Parameter
Status
Symbol
Min
Max.
Units
Conditions
Input Voltages
Logic”1”
Logic”0”
VIH
VIL
2.0
-0.1
VCC+1
0.8
V
V
Input Leakage
ILI
-10
10
µAVIN = 0V to VCC
Output Voltages
Logic”1”
Logic”0”
VOH
VOL
2.4
0.45
V
V
IOH = -400
µA
IOL = 2.1 mA
VCC Current, program & verify
ICC2
20
mA
Note 1
VPP Current, program
IPP2
25
mA
Note 1
A9 Product Identification
VH
11.5
12.5
V
Note 1: VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP
for Program, Program Verify
AC Testing Waveform:
VIH=2.4V and VIL=0.45V; VOH=2.0V; VOL=0.8V
and Program Inhibit Modes
Output Load:
1 TTL Load + 100pF
Ambient Temperature:
Tamb=25
°C ± 5°C
VCC= 6.5V
± 0.25V, VPP = VH = 13.0V ± 0.25V
Parameter
Symbol
Min.
Max.
Units
Remarks
Address Set-Up Time
tAS
2—
µs
Data Set-Up Time
tDS
2—
µs
Data Hold Time
tDH
2—
µs
Address Hold Time
tAH
0—
µs
Float Delay (2)
tDF
0
130
ns
VCC Set-Up Time
tVCS
2—
µs
Program Pulse Width (1)
tPW
95
105
µs
100
µs typical
CE Set-Up Time
tCES
2—
µs
OE Set-Up Time
tOES
2—
µs
VPP Set-Up Time
tVPS
2—
µs
Data Valid from OE
tOE
100
ns
Note 1: For express algorithm, initial programming width tolerance is 100
µs ±5%.
2: This parameter is only sampled and not 100% tested. Output float is defined as the point where data is no
longer driven (see timing diagram).



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