參數(shù)資料
型號： CY7C1177V18
廠商： Cypress Semiconductor Corp.
英文描述： 18-Mbit DDR-II+ SRAM 2-Word Burst Architecture (2.5 Cycle Read Latency)
中文描述： 18兆位的DDR - II SRAM的2字突發(fā)架構（2.5周期讀寫延遲）
文件頁數(shù)： 13/27頁
文件大?。?/td> 963K
代理商： CY7C1177V18
CY7C1166V18
CY7C1177V18
CY7C1168V18
CY7C1170V18
Document Number: 001-06620 Rev. *C
Page 20 of 27
Maximum Ratings
Exceeding maximum ratings may shorten the useful life of the
device. 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 VDD Relative to GND .......–0.5V to + 2.9V
Supply Voltage on VDDQ Relative to GND..... –0.5V to + VDD
DC Applied to Outputs in High-Z .........–0.5V to VDDQ + 0.3V
DC Input Voltage[11]............................... –0.5V to VDD + 0.3V
Current into Outputs (LOW)......................................... 20 mA
Static Discharge Voltage (MIL-STD-883, M 3015).... >2001V
Latch up Current..................................................... >200 mA
Operating Range
Range
Ambient
Temperature
VDD[15]
VDDQ[15]
Commercial
0°C to +70°C
1.8 ± 0.1V
1.4V to
VDD
Industrial
–40°C to +85°C
Electrical Characteristic
The DC Electrical Characteristics over the operating range follows.[12]
Parameter
Description
Test Conditions
Min
Typ
Max
Unit
VDD
Power Supply Voltage
1.7
1.8
1.9
V
VDDQ
IO Supply Voltage
1.4
1.5
VDD
V
VOH
Output HIGH Voltage
Note 16
VDDQ/2 – 0.12
VDDQ/2 + 0.12
V
VOL
Output LOW Voltage
Note 17
VDDQ/2 – 0.12
VDDQ/2 + 0.12
V
VOH(LOW)
Output HIGH Voltage
IOH = –0.1 mA, Nominal Impedance
VDDQ – 0.2
VDDQ
V
VOL(LOW)
Output LOW Voltage
IOL = 0.1 mA, Nominal Impedance
VSS
0.2
V
VIH
Input HIGH Voltage
VREF + 0.1
VDDQ + 0.15
V
VIL
Input LOW Voltage
–0.15
VREF – 0.1
V
IX
Input Leakage Current
GND
≤ VI ≤ VDDQ
–2
2
A
IOZ
Output Leakage Current
GND
≤ VI ≤ VDDQ, Output Disabled
–2
2
A
VREF
Input Reference Voltage[18]
Typical Value = 0.75V
0.68
0.75
0.95
V
IDD
VDD Operating Supply
VDD = Max, IOUT = 0 mA,
f = fmax = 1/tCYC
300 MHz
850
mA
333 MHz
920
mA
375 MHz
1020
mA
400 MHz
1080
mA
ISB1
Automatic Power Down Current Max VDD,
Both Ports Deselected,
VIN ≥ VIH or VIN ≤ VIL
f = fmax = 1/tCYC,
Inputs Static
300 MHz
250
mA
333 MHz
260
mA
375 MHz
290
mA
400 MHz
300
mA
AC Input Requirements
Over the operating range [11]
Parameter
Description
Test Conditions
Min
Typ
Max
Unit
VIH
Input HIGH Voltage
VREF + 0.2
–
VDDQ + 0.24
V
VIL
Input LOW Voltage
–0.24
–
VREF – 0.2
V
Notes
15. Power up: Is based on a linear ramp from 0V to VDD(min) within 200 ms. During this time VIH < VDD and VDDQ < VDD.
16. Outputs are impedance controlled. IOH = –(VDDQ/2)/(RQ/5) for values of 175 < RQ < 350.
17. Outputs are impedance controlled. IOL = (VDDQ/2)/(RQ/5) for values of 175 < RQ < 350
18. VREF (min) = 0.68V or 0.46VDDQ, whichever is larger, VREF (max) = 0.95V or 0.54VDDQ, whichever is smaller.
[+] Feedback
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