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CY7C1241V18, CY7C1256V18
CY7C1243V18, CY7C1245V18
Document Number: 001-06365 Rev. *D Page 21 of 28
Maximum Ratings
Exceeding maximum ratings may shorten the useful life of the
device. User guidelines are not tested.
Storage Temperature ................................. –65°C to +150°C
Ambient Temperature with Power Applied.. –55°C to +125°C
Supply Voltage on V
DD
Relative to GND........–0.5V to +2.9V
Supply Voltage on V
DDQ
Relative to GND..... –0.5V to + V
DD
DC Applied to Outputs in High-Z ........–0.5V to V
DDQ
+ 0.3V
DC Input Voltage
[13]
...............................–0.5V to V
DD
+ 0.3V
Current into Outputs (LOW).........................................20 mA
Static Discharge Voltage (MIL-STD-883, M. 3015)... >2001V
Latch Up Current.................................................... >200 mA
Operating Range
Range
Ambient
Temperature (T
A
) V
DD
[17]
V
DDQ
[17]
Com’l 0°C to +70°C 1.8 ± 0.1V 1.4V to V
DD
Ind’l –40°C to +85°C
Electrical Characteristics
Over the Operating Range
[14]
DC Electrical Characteristics
Parameter Description Test Conditions Min Typ Max Unit
V
DD
Power Supply Voltage 1.7 1.8 1.9 V
V
DDQ
IO Supply Voltage 1.4 1.5 V
DD
V
V
OH
Output HIGH Voltage Note 18 V
DDQ
/2 – 0.12 V
DDQ
/2 + 0.12 V
V
OL
Output LOW Voltage Note 19 V
DDQ
/2 – 0.12 V
DDQ
/2 + 0.12 V
V
OH(LOW)
Output HIGH Voltage I
OH
= −0.1 mA, Nominal Impedance V
DDQ
– 0.2 V
DDQ
V
V
OL(LOW)
Output LOW Voltage I
OL
= 0.1 mA, Nominal Impedance V
SS
0.2 V
V
IH
Input HIGH Voltage V
REF
+ 0.1 V
DDQ
+ 0.15 V
V
IL
Input LOW Voltage –0.15 V
REF
– 0.1 V
I
X
Input Leakage Current GND ≤ V
I
≤ V
DDQ
−22μA
I
OZ
Output Leakage Current GND ≤ V
I
≤ V
DDQ,
Output Disabled −22μA
V
REF
Input Reference Voltage
[20]
Typical Value = 0.75V 0.68 0.75 0.95 V
I
DD
[21]
V
DD
Operating Supply V
DD
= Max., I
OUT
= 0mA,
f = f
MAX
= 1/t
CYC
300 MHz 1040 mA
333 MHz 1120 mA
375 MHz 1240 mA
I
SB1
Automatic Power down
Current
Max. V
DD
, Both Ports
Deselected, V
IN
≥ V
IH
or
V
IN
≤ V
IL
, f = f
MAX
= 1/t
CYC
,
Inputs Static
300 MHz 280 mA
333 MHz 300 mA
375 MHz 310 mA
AC Electrical Characteristics
Over the Operating Range
[13]
Parameter Description Test Conditions Min Typ Max Unit
V
IH
Input HIGH Voltage V
REF
+ 0.2 – V
DDQ
+ 0.24 V
V
IL
Input LOW Voltage –0.24 – V
REF
– 0.2 V
Notes
17.Power up: Assumes a linear ramp from 0V to V
DD
(min) within 200 ms. During this time V
IH
< V
DD
and V
DDQ
< V
DD.
18.Outputs are impedance controlled. I
OH
= −(V
DDQ
/2)/(RQ/5) for values of 175Ω <= RQ <= 350Ωs.
19.Outputs are impedance controlled. I
OL
= (V
DDQ
/2)/(RQ/5) for values of 175Ω <= RQ <= 350Ωs.
20.V
REF
(min) = 0.68V or 0.46V
DDQ
, whichever is larger; V
REF
(max) = 0.95V or 0.54V
DDQ
, whichever is smaller.
21.The operation current is calculated with 50% read cycle and 50% write cycle.
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