7C1325B-100 查看數據表（PDF） - Cypress Semiconductor

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7C1325B-100

256K x 18 Synchronous 3.3V Cache RAM

Cypress Semiconductor 

CY7C1325B

Write Cycle Descriptions[1, 2, 3, 4]

Function

Read

Read

Write Byte 0 - DQ[7:0] and DP0

Write Byte 1 - DQ[15:8] and DP1

Write All Bytes

Write All Bytes

GW

BWE

BWS1

BWS0

1

1

X

X

1

0

1

1

1

0

1

0

1

0

0

1

1

0

0

0

0

X

X

X

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 on VDD Relative to GND................ –0.5V to +4.6V

DC Voltage Applied to Outputs

in High Z State[5]...............................................–0.5V to VDD + 0.5V

DC Input Voltage[5]...........................................–0.5V to VDD + 0.5V

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

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

(per MIL-STD-883, Method 3015)

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

Operating Range

Ambient

Range Temperature[6]

VDD

VDDQ

Com’l 0°C to +70°C 3.135V to 3.6V 2.375V to VDD

Ind’l

–40°C +70°C

Electrical Characteristics Over the Operating Range

Parameter

Description

VOH

Output HIGH Voltage

VOL

Output LOW Voltage

VIH

Input HIGH Voltage

Test Conditions

VDDQ = 3.3V, VDD = Min., IOH = –4.0 mA

VDDQ = 2.5V, VDD = Min., IOH = –2.0 mA

VDDQ = 3.3V, VDD = Min., IOL = 8.0 mA

VDDQ = 2.5V, VDD = Min., IOL = 2.0 mA

VDDQ = 3.3V

VIH

Input HIGH Voltage

VDDQ = 2.5V

VIL

Input LOW Voltage[5]

VIL

Input LOW Voltage[5]

VDDQ = 3.3V

VDDQ = 2.5V

IX

Input Load Current

GND ≤ VI ≤ VDDQ

(except ZZ and MODE)

Input Current of MODE

Input = VSS

Input = VDDQ

Input Current of ZZ

Input = VSS

Input = VDDQ

IOZ

Output Leakage Current

GND ≤ VI ≤ VDD, Output Disabled

Notes:

4. When a write cycle is detected, all I/Os are three-stated, even during byte writes.

5. Minimum voltage equals –2.0V for pulse durations of less than 20 ns.

6. TA is the case temperature.

7C1325B

Min. Max. Unit

2.4

V

2.0

V

0.4 V

0.7 V

2.0 VDD + V

0.3V

1.7 VDD + V

0.3V

–0.3 0.8 V

–0.3 0.7 V

−1

1 µA

–30

µA

5 µA

–5

µA

30 µA

–5

5 µA

7

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