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 VDD Relative to GND........–0.5V to +2.9V
Supply Voltage on VDDQ Relative to GND.....–0.5V to + VDD
DC Applied to Outputs in High-Z ........ –0.5V to VDDQ + 0.3V
DC Input Voltage[13]...............................–0.5V to VDD + 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 (TA) VDD[17] VDDQ[17]
Com’l 0°C to +70°C 1.8 ± 0.1V 1.4V to VDD
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
VDD Power Supply Voltage 1.7 1.8 1.9 V
VDDQ IO Supply Voltage 1.4 1.5 VDD V
VOH Output HIGH Voltage Note 18 VDDQ/2 – 0.12 VDDQ/2 + 0.12 V
VOL Output LOW Voltage Note 19 VDDQ/2 – 0.12 VDDQ/2 + 0.12 V
VOH(LOW) Output HIGH Voltage IOH = −0.1 mA, Nominal Impedance VDDQ – 0.2 VDDQ V
VOL(LOW) Output LOW Voltage IOL = 0.1 mA, Nominal Impedance VSS 0.2 V
VIH Input HIGH Voltage VREF + 0.1 VDDQ + 0.15 V
VIL Input LOW Voltage –0.15 VREF – 0.1 V
IXInput Leakage Current GND ≤ VI ≤ VDDQ −22μA
IOZ Output Leakage Current GND ≤ VI ≤ VDDQ, Output Disabled −22��A
VREF Input Reference Voltage[20] Typical Value = 0.75V 0.68 0.75 0.95 V
IDD [21] VDD Operating Supply VDD = Max., IOUT = 0mA,
f = fMAX = 1/tCYC
300 MHz 1040 mA
333 MHz 1120 mA
375 MHz 1240 mA
ISB1 Automatic Power down
Current Max. VDD, Both Ports
Deselected, VIN ≥ VIH or
VIN ≤ VIL, f = fMAX = 1/tCYC,
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
VIH Input HIGH Voltage VREF + 0.2 – VDDQ + 0.24 V
VIL Input LOW Voltage –0.24 – VREF – 0.2 V
Notes
17.Power up: Assumes a linear ramp from 0V to VDD(min) within 200 ms. During this time VIH < VDD and VDDQ < VDD.
18.Outputs are impedance controlled. IOH = −(VDDQ/2)/(RQ/5) for values of 175Ω <= RQ <= 350Ωs.
19.Outputs are impedance controlled. IOL = (VDDQ/2)/(RQ/5) for values of 175Ω <= RQ <= 350Ωs.
20.VREF (min) = 0.68V or 0.46VDDQ, whichever is larger; VREF (max) = 0.95V or 0.54VDDQ, whichever is smaller.
21.The operation current is calculated with 50% read cycle and 50% write cycle.
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