Cypress CY7C1241V18 Manual De Usuario

Document Number: 001-06365 Rev. *D

Page 21 of 28

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

............................... –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

Com’l

0°C to +70°C 

1.8 ± 0.1V

1.4V to V

DD

Ind’l

–40°C to +85°C

Over the Operating Range

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

V

DDQ

/2 – 0.12

V

DDQ

/2 + 0.12

V

V

OL

Output LOW Voltage

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

−2

2

μA

I

OZ

Output Leakage Current

GND 

≤ V

I

 

≤ V

DDQ, 

Output Disabled

−2

2

μA

V

REF

Input Reference Voltage

Typical Value = 0.75V

0.68

0.75

0.95

V

I

DD 

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

Over the Operating Range 

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

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 175

Ω <= RQ <= 350Ωs.

19. Outputs are impedance controlled. I

OL

 = (V

DDQ

/2)/(RQ/5) for values of 175

Ω <= 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.