UVEPROM
SMJ27C256
Austin Semiconductor, Inc.
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage Range, VCC**...........................-0.6V to +7.0V
Supply Voltage Range, Vpp**.........................-0.6V to +14.0V
*Stresses greater than those listed under "Absolute Maximum
Ratings" may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
these or any other conditions above those indicated in the
operation section of this specification is not implied.
Exposure to absolute maximum rating conditions for extended
periods may affect reliability.
Input Voltage Range, All inputs except A9**..-0.6V to +6.5V
A9.....-0.6V to +13.5V
Output Voltage Range**...............................-0.6V to VCC +1V
Minimum Operating Free-air Temperature, TA..............-55°C
Maximum Operating Case Temperature, TC...................125°C
Storage Temperature Range, Tstg.....................-65°C to 150°C
** All voltage values are with respect to GND.
RECOMMENDED OPERATING CONDITIONS
MIN
4.5
TYP
5
MAX
5.5
UNIT
Read Mode1
SNAP! Pulse programming algorithm
Read Mode2
SNAP! Pulse programming algorithm
V
V
V
V
V
VCC
VPP
Supply Voltage
Supply Voltage
6.25
6.5
6.75
VCC-0.6
13.25
12.75
2
13
TTL inputs
VCC+1
VIH
VIL
High-level input voltage
Low-level input voltage
CMOS inputs
V
VCC-0.2
VCC+1
TTL inputs
CMOS inputs
-0.5
-0.5
0.8
0.2
V
V
Voltage level on A9 for signature mode
Operating free-air temperature
Operating case temperature
11.5
-55
13
V
VID
TA
°C
°C
+125
TC
NOTES:
1. VCC must be applied before or at the same time as VPP and removed after or at the same time as VPP. The deivce must not be inserted into or removed from the
board when VPP or VCC is applied.
2. VPP can be connected to VCC directly (except in the program mode). VCC supply current in this case would be ICC2 + IPP1
.
ELECTRICAL CHARACTERISTICS OVER RECOMMENDED RANGES OF SUPPLYVOLTAGE AND
OPERATING FREE-AIRTEMPERATURE
TYP1
TEST CONDITIONS
IOH = -400µA
MIN
MAX
UNIT
PARAMETER
High-level output voltage
2.4
V
VOH
VOL
II
Low-level output voltage
Input current (leakage)
Output current (leakage)
VPP supply current
0.4
±1
V
IOL = 2.1mA
µA
µA
µA
mA
µA
µA
VI = 0V to 5.5V
VO = 0V to VCC
VPP = VCC = 5.5V
VPP = 13V
±1
IO
10
IPP1
IPP2
PP supply current (during program pulse)2
35
15
50
V
TTL-Input Level
500
300
VCC = 5.5V, E\=VIH
VCC = 5.5V, E\=VCC
ICC1
VCC supply current (standby)
CMOS-Input Level
'27C256-15
'27C256-17
'27C256-20
'27C256-25
E\=VIL, VCC=5.5V
ICC2
VCC supply current (active)
Output current (leakage)
25
mA
mA
t
cycle = minimum, outputs
open
100
IOS
NOTES:
1. Typical values are at TA=25°C and nominal voltages.
2. This parameter has been characterized at 25°C and is not tested.
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
SMJ27C256
Rev. 1.0 9/01
5
AUSTIN [ AUSTIN SEMICONDUCTOR ]
