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CY7C1414JV18 Datasheet(PDF) 7 Page - Cypress Semiconductor

Part # CY7C1414JV18
Description  36-Mbit QDR??II SRAM 2-Word Burst Architecture
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY7C1414JV18 Datasheet(HTML) 7 Page - Cypress Semiconductor

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CY7C1410JV18, CY7C1425JV18
CY7C1412JV18, CY7C1414JV18
Document #: 001-12561 Rev. *D
Page 7 of 26
CQ
Echo Clock
CQ is Referenced with Respect to C. This is a free - running clock and is synchronized to the Input
clock for output data (C) of the QDR-II. In the single clock mode, CQ is generated with respect to K. The
timings for the echo clocks is shown in the Switching Characteristics on page 22.
CQ
Echo Clock
CQ is Referenced with Respect to C. This is a free - running clock and is synchronized to the Input
clock for output data (C) of the QDR-II. In the single clock mode, CQ is generated with respect to K. The
timings for the echo clocks is shown in the Switching Characteristics on page 22.
ZQ
Input
Output Impedance Matching Input. This input is used to tune the device outputs to the system data bus
impedance. CQ, CQ, and Q[x:0] output impedance are set to 0.2 x RQ, where RQ is a resistor connected
between ZQ and ground. Alternatively, this pin can be connected directly to VDDQ, which enables the
minimum impedance mode. This pin cannot be connected directly to GND or left unconnected.
DOFF
Input
DLL Turn Off
− Active LOW. Connecting this pin to ground turns off the DLL inside the device. The timing
in the DLL turned off operation differs from those listed in this data sheet. For normal operation, this pin
can be connected to a pull up through a 10-Kohm or less pull up resistor. The device behaves in DDR-I
mode when the DLL is turned off. In this mode, the device can be operated at a frequency of up to 167
MHz with QDR-I timing.
TDO
Output
TDO for JTAG.
TCK
Input
TCK Pin for JTAG.
TDI
Input
TDI Pin for JTAG.
TMS
Input
TMS Pin for JTAG.
NC
N/A
Not Connected to the Die. Can be tied to any voltage level.
NC/72M
N/A
Not Connected to the Die. Can be tied to any voltage level.
NC/144M
N/A
Not Connected to the Die. Can be tied to any voltage level.
NC/288M
N/A
Not Connected to the Die. Can be tied to any voltage level.
VREF
Input-
Reference
Reference Voltage Input. Static input used to set the reference level for HSTL inputs, outputs, and AC
measurement points.
VDD
Power Supply Power Supply Inputs to the Core of the Device.
VSS
Ground
Ground for the Device.
VDDQ
Power Supply Power Supply Inputs for the Outputs of the Device.
Pin Definitions (continued)
Pin Name
IO
Pin Description
[+] Feedback


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