CY7C197 데이터 시트보기 (PDF) - Cypress Semiconductor

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CY7C197

256Kx1 Static RAM

Cypress Semiconductor 

CY7C197

Maximum Ratings

(Above which the useful life may be impaired. For user guide-

lines, not tested.)

Storage Temperature .....................................−65°C to +150°C

Ambient Temperature with

Power Applied..................................................−55°C to +125°C

Supply Voltage to Ground Potential

(Pin 24 to Pin 12).................................................−0.5V to +7.0V

DC Voltage Applied to Outputs

in High Z State[1] ....................................... −0.5V to VCC + 0.5V

Electrical Characteristics Over the Operating Range

DC Input Voltage[1].................................... −0.5V to VCC + 0.5V

Output Current into Outputs (LOW)............................. 20 mA

Static Discharge Voltage .......................................... >2001V

(per MIL-STD-883, Method 3015)

Latch-Up Current.................................................... >200 mA

Operating Range

Range

Commercial

Ambient

Temperature

0°C to +70°C

VCC

5V ± 10%

7C197-12

7C197-15

Parameter

Description

Test Conditions

Min. Max. Min. Max.

VOH

Output HIGH Voltage

VCC = Min., IOH = −4.0 mA

2.4

2.4

VOL

Output LOW Voltage

VCC = Min. IOL=12.0 mA

0.4

0.4

VIH

Input HIGH Voltage

2.2

VCC

2.2

+ 0.3V

VCC

+0.3V

VIL

Input LOW Voltage[1]

−0.5 0.8 −0.5 0.8

IIX

Input Load Current

GND < VI < VCC

−5

+5

−5

+5

IOZ

Output Leakage Current

GND < VO < VCC, Output Disabled

−5

+5

−5

+5

IOS

Output Short

Circuit Current[2]

VCC = Max., VOUT = GND

−300

−300

ICC

VCC Operating

Supply Current

VCC = Max., IOUT = 0 mA,

f = fMAX = 1/tRC

150

140

ISB1

Automatic CE Power-Down

Current—TTL Inputs[3]

Max. VCC, CE > VIH, VIN > VIH or

VIN < VIL, f = fMAX

30

30

ISB2

Automatic CE Power-Down

Current—CMOS Inputs[3]

Max. VCC, CE > VCC − 0.3V,

VIN > VCC − 0.3V or VIN < 0.3V

10

10

Notes:

1. V(min.) = −2.0V for pulse durations of less than 20 ns.

2. Not more than one output should be shorted at one time. Duration of the short circuit should not exceed 30 seconds.

3. A pull-up resistor to VCC on the CE input is required to keep the device deselected during VCC power-up, otherwise ISB will exceed values given.

Unit

V

V

V

V

µA

µA

mA

mA

mA

mA

Document #: 38-05049 Rev. **

Page 2 of 10

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