Cypress CY7C1277V18 Manual De Usuario

Document Number: 001-06347  Rev. *D

Page 20 of 27

Exceeding maximum ratings may impair the useful life of the
device. These 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 

= 0 mA, 

f = f

MAX

 = 1/t

CYC

300 MHz

1000

mA

333 MHz

1080

mA

375 MHz

1210

mA

400 MHz

1280

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

290

mA

333 MHz

300

mA

375 MHz

320

mA

400 MHz

340

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

15. 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

.

16. Outputs are impedance controlled. I

OH 

= –(V

DDQ

/2)/(RQ/5) for values of 175

Ω < RQ < 350Ω.

17. Outputs are impedance controlled. I

OL 

= (V

DDQ

/2)/(RQ/5) for values of 175

Ω < RQ < 350Ω.

18. V

REF

(min) = 0.68V or 0.46V

DDQ

, whichever is larger, V

REF

(max) =

 

0.95V or 0.54V

DDQ

, whichever is smaller.

19. The operation current is calculated with 50% read cycle and 50% write cycle.