27C512A
TABLE 1-4:
PROGRAMMING DC CHARACTERISTICS
Ambient Temperature: Tamb = 25°C ± 5°C
VCC = 6.5V ± 0.25V, OE/VPP = VH = 13.0V ± 0.25V
Parameter
Status
Symbol
Min.
Max.
Units
Conditions (See Note 1)
Input Voltages
Logic “1”
Logic “0”
VIH
VIL
2.0
-0.1
VCC+1
0.8
V
V
Input Leakage
—
ILI
-10
10
µA
VIN = 0V to VCC
Output Voltages
Logic “1”
Logic “0”
VOH
VOL
2.4
—
V
V
IOH = -400 µA
IOL = 2.1 mA
0.45
35
VCC Current, program & verify
OE/VPP Current, program
A9 Product Identification
—
—
—
ICC2
IPP2
VID
—
—
mA
mA
V
CE = VIL
25
11.5
12.5
Note 1: VCC must be applied simultaneously or before VPP voltage on OE/VPP and removed simultaneously or after
the VPP voltage on OE/VPP.
TABLE 1-5:
PROGRAMMING AC CHARACTERISTICS
for Program, Program Verify
and Program Inhibit Modes
AC Testing Waveform: VIH=2.4V and VIL=0.45V; VOH=2.0V; VOL=0.8V
Ambient Temperature: 25°C ±5°C
VCC = 6.5V ± 0.25V, OE/VPP = VH = 13.0V ± 0.25 V
Parameter
Symbol
Min. Max. Units
Remarks
Address Set-Up Time
Data Set-Up Time
tAS
tDS
2
2
—
—
µs
µs
µs
µs
ns
µs
µs
µs
µs
µs
µs
ns
Data Hold Time
tDH
2
—
Address Hold Time
Float Delay (2)
tAH
0
—
tDF
0
130
—
VCC Set-Up Time
tVCS
tPW
tCES
tOES
tOEH
tOR
2
Program Pulse Width (1)
CE Set-Up Time
95
2
105
—
100 µs typical
OE Set-Up Time
2
—
OE Hold Time
2
—
OE Recovery Time
OE /VPP Rise Time During Programming
2
—
tPRT
50
—
Note 1: For express algorithm, initial programming width tolerance is 100 µs ±5%.
2: This parameter is only sampled and not 100% teted. Output float is defined as the point where data is no
longer driven (see timing diagram).
DS11173F-page 4
1998 Microchip Technology Inc.
This Material Copyrighted by Its Respective Manufacturer