Cypress CY7C1243V18, CY7C1241V18 Maximum Ratings, Operating Range, Electrical Characteristics

CY7C1241V18, CY7C1256V18 CY7C1243V18, CY7C1245V18

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 V + 0.3V
		DD

Current into Outputs (LOW)					20 mA
Static Discharge Voltage (MIL-STD-883, M. 3015)...					>2001V
Latch Up Current					>200 mA
Operating Range
Range	Ambient	V	[17]	V	[17]
	Temperature (T )
	A		DD		DDQ
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

IX

Input Leakage Current

GND ≤ VI ≤ VDDQ

−2

2

μA

IOZ

Output Leakage Current

GND ≤ VI ≤ VDDQ, Output Disabled

−2

2

μA

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,

300 MHz

1040

mA

f = fMAX = 1/tCYC

333 MHz

1120

mA

375 MHz

1240

mA

ISB1

Automatic Power down

Max. VDD, Both Ports

300 MHz

280

mA

Current

Deselected, VIN ≥ VIH or

333 MHz

300

mA

V

≤ V , f = f

= 1/t

,

IN

IL

MAX

CYC

Inputs Static

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.

Document Number: 001-06365 Rev. *D Page 21 of 28

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