WED8L24258V 데이터 시트보기 (PDF) - White Electronic Designs Corporation

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WED8L24258V

Asynchronous SRAM, 3.3V, 256Kx24

White Electronic Designs Corporation 

WED8L24258V

ABSOLUTE MAXIMUM RATINGS

Voltage on any pin relative to VSS

Operating Temperature TA (Ambient)

Commercial

Industrial

Storage Temperature

Power Dissipation

Output Current.

-0.5V to 4.6V

0°C to + 70°C

-40°C to +85°C

-55°C to +125°C

1.5 Watts

50 mA

*Stress greater than those listed under "Absolute Maximum Ratings" may cause permanent

damage to the device. This is a stress rating only and functional operation of the device at

these or any other conditions greater than those indicated in the operational sections of this

specification is not implied. Exposure to absolute maximum rating conditions for extended

periods may affect reliability.

AC TEST CONDITIONS

Input Pulse Levels

Input Rise and Fall Times

Input and Output Timing Levels

Output Load

NOTE: For TEHQZ,TGHQZ and TWLQZ, Figure 3

VSS to 3.0V

5ns

1.5V

Figure 2

RECOMMENDED DC OPERATING CONDITIONS

Parameter

Supply Voltage

Supply Voltage

Input High Voltage

Input Low Voltage

Sym Min Typ Max Units

VCC 3.135 3.3 3.465 V

VSS

0

0

0V

VIH 2.2 -- VCC+0.3 V

VIL -0.3 -- 0.8 V

FIG. 2

FIG. 3

Q

Z0Z0==5500ΩΩ

RL = 50Ω

VL = 1.5V

65 pF

DOUT

353Ω

VCC

319Ω

5 pF

DC ELECTRICAL CHARACTERISTICS

Parameter

Sym

Conditions

Min

Max

Units

10ns

12-15ns

Operating Power Supply Current ICC1

W= VIL, II/O = 0mA,

Min Cycle

500

480

mA

Standby (TTL) Supply Current

ICC2

E > VIH, VIN < VIL or

VIN > VIH, f=ØMHz

150

150

mA

Full Standby CMOS

ICC3

E > VCC-0.2V

90

90

mA

Supply Current

VIN > VCC-0.2V or

VIN < 0.2V

Input Leakage Current

ILI

VIN = 0V to VCC

±10

±10

µA

Output Leakage Current

ILO

V I/O = 0V to VCC

±10

±10

µA

Output High Volltage

VOH

IOH = -4.0mA

2.4

V

Output Low Voltage

VOL

IOL = 4.0mA

0.4

0.4

V

TRUTH TABLE

G E0 E2 E3 W

Mode

Output Power

XH H H X

Standby

High Z ICC2,ICC3

H L L L H Output Deselect High Z ICC1

L L L L H Read (24 bit) DOUT ICC1

LL H H H

Read

DQ0-7

ICC1

LH L H H

Read

DQ8-15

ICC1

LH H L H

Read

DQ16-23 ICC1

X L L L L Write (24 bit)

DIN

ICC1

XL H H L

Write

DQ0-7

ICC1

XH L H L

Write

DQ8-15

ICC1

XH H L L

Write

DQ16-23 ICC1

White Electronic Designs Corporation • (508) 366-5151 • www.whiteedc.com

2

CAPACITANCE

(f=1.0MHz, VIN=VCC or VSS)

Parameter

Sym Max Unit

Address Lines

CA

8 pF

Data Lines

CD/Q 10 pF

Write & Output Enable Lines

W, G

8 pF

Chip Enable Lines

EØ, E2, E3 8 pF

These parameters are sampled, not 100% tested.

July 2002 Rev. 0A

ECO #15432

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