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參數(shù)資料
| 型號(hào)： | SRV Series |
| 英文描述： | SRAM Memory Card 256KB Through 8MB(256KB - 8MB靜態(tài)RAM存儲(chǔ)器卡) |
| 中文描述： | SRAM的記憶卡，通過(guò)8MB的256KB的（256KB的- 8MB的靜態(tài)RAM的存儲(chǔ)器卡） |
| 文件頁(yè)數(shù)： | 1/10頁(yè) |
| 文件大?。?/td> | 121K |
| 代理商： | SRV SERIES |
June 2000 Rev. 1 - ECO #12896
1
PCMCIA Flash Memory Card
SRV Series
PC Card Products
Features
High Performance SRAM memory Card
Universal 3.3 to 5 Volt Supply allows for wider
compatibility between systems.
Fast Access times: 150ns @ 5V
250ns @ 3.3V
x8/x16 PCMCIA standard interface
Low Power CMOS technology provides very low
power and reliable data retention characteristics
- standby current < 100μA typical
Rechargeable Lithium battery with recharge circuitry
- eliminates the need for replaceable batteries
- standby current during recharge typically < 2mA
- battery backup time
7 months
- type I card
18 months - type II card
typical based on 4MB (lower densities will
have greater storage times)
Unlimited write cycles, no endurance issues
Optional Features:
2KB EEPROM attribute memory containing
CIS
Optional Hardware Write Protect switch
PC Card Standard Type I or Type II Form Factor
The WEDC SRAM Series (SRV) memory cards
offer a high performance nonvolatile storage solution
for code and data storage, disk caching, and write
intensive mobile and embedded applications.
Packaged in PCMCIA type I or type II housing (type
II for cards with extended battery backup time and
8MB cards), the WEDC SRAM SRV series is based
on 1 or 4Mbit SRAM
memories, providing densities
from 256 Kilobytes to 8 Megabytes.
The SRV series of SRAM memory cards is a
universal 3V/ 5V power supply and operates at
speeds as high as 150ns. The cards are based on
advanced CMOS technology providing very low
power and reliable data retention characteristics.
WEDC’s SRAM cards contain a rechargeable
lithium battery and recharge circuitry, eliminating the
need for replaceable batteries found in many SRAM
cards.
WEDC’s standard cards are shipped with WEDC’s
SRAM Logo. Cards are also available with blank
housings (no Logo). The blank housings are available
in both a recessed (for label) and flat housing. Please
contact WEDC sales representative for further
information on Custom artwork.
SRAM Memory Card 256KB through 8MB
General Description
Block Diagram
4MB SRAM Card Shown
+
decoder
address
[A1..A19]
/CSLi
/CSHi
/CSHi
[DO..D7]
[D8..D15]
Write Prot
S1
WP
Vcc
[A20..A22]
ATTRIBUTE
MEMORY
CA0
+ + +
/CS-A
/RD
/CTRL
//RD
/WR
/RD
CTRL
Power Management
Lithium Bat.
to internal
Vcc
BVD1
GND
VS1
VS2
[D8..D15]
[DO..D7]
I/O BUFFER
SRAM
512K x 8
[A1..A11]
GND
NC
+
2. pull up resistor (min 10k)
Notes: 1. pull down resistor (min 100k)
+
+
SRAM
512K x 8
SRAM
512K x 8
SRAM
512K x 8
SRAM
512K x 8
SRAM
512K x 8
SRAM
512K x 8
SRAM
512K x 8
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