參數(shù)資料
型號(hào)： CY7C1245V18-300BZXI
廠商： CYPRESS SEMICONDUCTOR CORP
元件分類(lèi)： DRAM
英文描述： 36-Mbit QDR⑩-II+ SRAM 4-Word Burst Architecture (2.0 Cycle Read Latency)
中文描述： 1M X 36 QDR SRAM, 0.45 ns, PBGA165
封裝： 15 X 17 MM, 1.40 MM HEIGHT, LEAD FREE, MO-216, FBGA-165
文件頁(yè)數(shù)： 20/28頁(yè)
文件大?。?/td> 1042K
代理商： CY7C1245V18-300BZXI
CY7C1241V18
CY7C1256V18
CY7C1243V18
CY7C1245V18
Document Number: 001-06365 Rev. *C
Page 20 of 28
Power Up Sequence in QDR-II+ SRAM
QDR-II+ SRAMs must be powered up and initialized in a
predefined manner to prevent undefined operations. During
power up, when the DOFF is tied HIGH, the DLL is locked after
2048 cycles of stable clock.
Power Up Sequence
Apply power with DOFF tied HIGH (All other inputs can be
HIGH or LOW)
— Apply V
DD
before V
DDQ
— Apply V
DDQ
before V
REF
or at the same time as V
REF
— Provide stable power and clock (K, K) for 2048 cycles to
lock the DLL.
DLL Constraints
DLL uses K clock as its synchronizing input. The input must
have low phase jitter, which is specified as t
KC Var
.
The DLL functions at frequencies down to 120 MHz.
If the input clock is unstable and the DLL is enabled, then
the DLL may lock onto an incorrect frequency, causing
unstable SRAM behavior. To avoid this, provide 2048 cycles
stable clock to relock to the clock frequency you want.
Power Up Waveforms
Figure 2. Power Up Waveforms
K
K
Fix HIGH (tie to VDDQ)
VDD/VDDQ
DOFF
Clock Start (Clock Starts after VDD/VDDQ is Stable)
Unstable Clock
> 2048 Stable Clock
Start Normal
Operation
~
~
VDD/VDDQ Stable (< + 0.1V DC per 50 ns)
[+] Feedback
相關(guān)PDF資料
PDF描述
CY7C1256V18 36-Mbit QDR⑩-II+ SRAM 4-Word Burst Architecture (2.0 Cycle Read Latency)
CY7C1256V18-300BZC 36-Mbit QDR⑩-II+ SRAM 4-Word Burst Architecture (2.0 Cycle Read Latency)
CY7C1256V18-300BZI 36-Mbit QDR⑩-II+ SRAM 4-Word Burst Architecture (2.0 Cycle Read Latency)
CY7C1256V18-300BZXC 36-Mbit QDR⑩-II+ SRAM 4-Word Burst Architecture (2.0 Cycle Read Latency)
CY7C1256V18-300BZXI 36-Mbit QDR⑩-II+ SRAM 4-Word Burst Architecture (2.0 Cycle Read Latency)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
CY7C1245V18-375BZC 制造商:Cypress Semiconductor 功能描述:
CY7C1245XC 制造商:Cypress Semiconductor 功能描述:
CY7C12481KV18-400BZC 功能描述:靜態(tài)隨機(jī)存取存儲(chǔ)器 2M X 18 400MHz DDR II+ 靜態(tài)隨機(jī)存取存儲(chǔ)器 RoHS:否 制造商:Cypress Semiconductor 存儲(chǔ)容量:16 Mbit 組織:1 M x 16 訪問(wèn)時(shí)間:55 ns 電源電壓-最大:3.6 V 電源電壓-最小:2.2 V 最大工作電流:22 uA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSOP-48 封裝:Tray
CY7C12481KV18-400BZXC 功能描述:IC SRAM 36MBIT 400MHZ 165-FPBGA RoHS:是 類(lèi)別:集成電路 (IC) >> 存儲(chǔ)器 系列:- 標(biāo)準(zhǔn)包裝:150 系列:- 格式 - 存儲(chǔ)器:EEPROMs - 串行 存儲(chǔ)器類(lèi)型:EEPROM 存儲(chǔ)容量:4K (2 x 256 x 8) 速度:400kHz 接口:I²C，2 線串口 電源電壓:2.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:8-VFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-DFN（2x3） 包裝:管件 產(chǎn)品目錄頁(yè)面:1445 (CN2011-ZH PDF)
CY7C1248KV18-400BZC 功能描述:靜態(tài)隨機(jī)存取存儲(chǔ)器 36MB (2Mx18) 1.8v 400MHz DDR II 靜態(tài)隨機(jī)存取存儲(chǔ)器 RoHS:否 制造商:Cypress Semiconductor 存儲(chǔ)容量:16 Mbit 組織:1 M x 16 訪問(wèn)時(shí)間:55 ns 電源電壓-最大:3.6 V 電源電壓-最小:2.2 V 最大工作電流:22 uA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSOP-48 封裝:Tray
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