CY7C148 查看數據表（PDF） - Cypress Semiconductor

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CY7C148

1Kx4 Static RAM

Cypress Semiconductor 

CY7C148

CY7C149

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

Maximum Ratings

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

(per MIL-STD-883, Method 3015)

(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 18 to Pin 9)....................................................−0.5V to+7.0V

DC Voltage Applied to Outputs

in High Z State ......................................................−0.5V to+7.0V

DC Input Voltage .................................................−3.0V to +7.0V

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

Operating Range

Range

Ambient

Temperature

Commercial

Military[1]

0°C to +70°C

−55°C to +125°C

Note:

1. TA is the “instant on” case temperature.

VCC

5V ± 10%

5V ± 10%

Electrical Characteristics Over the Operating Range[2]

Parameter

VOH

VOL

VIH

VIL

IIX

IOZ

ICC

Description

Output HIGH Voltage

Output LOW Voltage

Input HIGH Voltage

Input LOW Voltage

Input Load Current

Output Leakage Current

VCC Operating

Supply Current

Test Conditions

VCC = Min., IOH = −4.0 mA

VCC = Min., IOL = 8.0 mA

GND < VI < VCC

GND < VO < VCC Output Disabled

Max. VCC, CS < VIL,

Output Open

Com’l

Mil

7C148−25

7C149−25

7C148−35, 45

7C149−35, 45

Min. Max. Min. Max. Unit

2.4

2.4

V

0.4

0.4 V

2.0 6.0 2.0 6.0 V

−3.0 0.8 −3.0 0.8 V

−10 10 −10 10 µA

−50 50 −50 50 µA

90

80 mA

110

ISB

Automatic CS

Max. VCC, CS > VIH 7C148 Com’l

15

10 mA

Power-Down Current

Only

Mil

10

IPO

Peak Power-On

Current[3]

Max. VCC, CS > VIH 7C148

Only

Com’l

Mil

IOS

Output Short

Circuit Current[4]

GND < VO < VCC

Com’l

Mil

15

±275

10 mA

10

±275 mA

±350

Capacitance[5]

Parameter

Description

Test Conditions

Max.

Unit

CIN

COUT

Input Capacitance

Output Capacitance

TA = 25°C, f = 1 MHz,

VCC = 5.0V

8

pF

8

pF

Notes:

2. See the last page of this specification for Group A subgroup testing information.

3. A pull-up resistor to VCC on the CS input is required to keep the device deselected during VCC power-up. Otherwise current will exceed values given (CY7C148

only).

4. For test purposes, not more than 1 output should be shorted at one time. Duration of the short circuit should not exceed 30 seconds.

5. Tested initially and after any design or process changes that may affect these parameters.

Document #: 38-05059 Rev. **

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