UTRON
Preliminary Rev. 0.1
UT62L2568(I)
256K X 8 BIT LOW POWER CMOS SRAM
TRUTH TABLE
MODE
Standby
Output Disable
Read
Write
CE1 CE2 OE
H
X
X
X
L
X
L
H
H
L
H
L
L
H
X
Note: H = VIH, L=VIL, X = Don't care.
WE
I/O OPERATION SUPPLY CURRENT
X
High - Z
ISB,ISB1 , ISB2
X
High -Z
ISB,ISB1 , ISB2
H
High - Z
ICC , Icc1 , Icc2
H
DOUT
ICC, Icc1 , Icc2
L
DIN
ICC, Icc1 , Icc2
ABSOLUTE MAXIMUM RATINGS*
PARAMETER
SYMBOL
RATING
UNIT
Terminal Voltage with Respect to VSS
Operating Temperature Industrial
Storage Temperature
Power Dissipation
DC Output Current
Soldering Temperature (under 10 secs)
VTERM
TA
TSTG
PD
IOUT
Tsolder
-0.5 to Vcc+0.3V
V
-40 to 85
℃
-65 to 150
℃
1
W
50
mA
260
℃
*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 or any other conditions above those indicated in the operational sections
of this specification is not implied. Exposure to the absolute maximum rating conditions for extended period may affect device
reliability.
DC ELECTRICAL CHARACTERISTICS (VCC = 2.5V~3.6V, TA = -40℃ to 85℃)
PARAMETER
SYMBOL TEST CONDITION
MIN. TYP. MAX. UNIT
Power Voltage
Vcc
2.5 3.0 3.6 V
Input High Voltage
VIH
2.2 - Vcc+0.3 V
Input Low Voltage
VIL
- 0.3 -
0.6
V
Input Leakage Current
ILI
VSS ≦VIN ≦VCC
-1 -
1
µA
Output Leakage Current ILO VSS ≦VI/O ≦VCC, Output Disabled
-1 -
1
µA
Output High Voltage
VOH IOH= - 1mA
2.2 -
-
V
Output Low Voltage
VOL IOL= 2.1mA
--
0.4
V
Cycle time=Min.100% duty,
55 - 25
ICC
CE 1 =VIL, CE2 = VIH, II/O =0mA
70 -
15
40 mA
25 mA
Cycle time = 1µs,100% duty,
Operating Current
Icc1 CE 1 ≦0.2V,CE2≧VCC-0.2V, II/O=0mA, -
4
other pins at 0.2V or Vcc-0.2V,
5 mA
Cycle time =500ns,100% duty,
Icc2 CE 1 ≦0.2V,CE2≧VCC-0.2V, II/O=0mA, -
8
other pins at 0.2V or Vcc-0.2V,
10 mA
Standby Current (TTL)
ISB CE 1 =VIH or CE2 = VIL
- 0.3 0.5 mA
CE 1 ≧VCC-0.2V or .CE2≦0.2V, -L -
-
ISB1 other pins at 0.2V or Vcc-0.2V,
Standby Current (CMOS)
TA=0℃~50℃
-LL - -
CE 1 ≧VCC-0.2V or .CE2≦0.2V, -L -
-
ISB2 other pins at 0.2V or Vcc-0.2V,
TA= - 40℃~85℃
-LL - -
20 µA
3
µA
80 µA
10 µA
UTRON TECHNOLOGY INC.
1F, No. 11, R&D Rd. II, Science-Based Industrial Park, Hsinchu, Taiwan, R. O. C.
TEL: 886-3-5777882 FAX: 886-3-5777919
3
P80082