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Part: SRA01-SRA04
Category:
Memory
-> Smart Cards
-> PCMCIA SRAM Cards
Description: Density = 64KB-8MB ;; Memory Device = 256Kb,1,2,&4Mb ;; Organization = X16/x8 ;; Speed (ns) = 150 ;; Volt = 5 ;;
Company: White Electronic Designs Corporation
Datasheet: Download SRA01-SRA04 datasheet File size : 71 kB
Request For quote: Find where to buy SRA01-SRA04
Datasheet text preview:
PCMCIA SRAM Memory Card
SRA Series SRAM Memory Card General Description
The WEDC SRAM Series (SRA) 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), the WEDC SRAM SRA series is based on 1 or 4Mbit SRAM memories, providing densities from 256 Kilobytes to 8 Megabytes. The SRA series of SRAM memory cards requires a 5V power supply and operates at speeds to 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.
256KB through 8MB Features
· High Performance SRAM memory Card · Single 5 Volt Supply - (3.3V/5V operation is available as an option) · Fast Access times: 150ns · 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
Block Diagram
4MB SRAM Card Shown
[A1..A19] address buff er SRAM 512K x 8 [A20..A22] /CSHi +++++ CE1# CE2# W E# OE# REG# A0 decoder and control logic /CSLi /CS-A /RD /RD /W R /W R CTRL 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 /CSHi
[A1..A11] ATTRIBUTE MEMORY
S1 WP VS1 VS2 GND NC NC W rite Prot Switch
Vcc
/CS-A /RD /W R
CTRL
I/O BUFFER
[DO..D7]
[DO..D7]
[D8..D15] + BVD1 BVD2 Vcc
[D8..D15] Power Management and Battery Control Notes: to internal power supply 1. pull down resistor (min 100k) + 2. pull up resistor (min 10k)
Lithium Bat.
February 2002 Rev. 6
1
PC Card Products
PCMCIA SRAM Memory Card
SRA Series Pinout
P in Signal name 1 GND 2 D Q3 3 D Q4 4 D Q5 5 D Q6 6 D Q7 7 CE1# 8 A10 9 OE# 10 A11 11 A9 12 A8 13 A13 14 A14 15 WE# 16 RDY/BSY# 17 Vc c 18 Vpp1 19 A16 20 A15 21 A12 22 A7 23 A6 24 A5 25 A4 26 A3 27 A2 28 A1 29 A0 30 D Q0 31 D Q1 32 D Q2 33 WP 34 GND I/O I/O I/O I/O I/O I/O I I I I I I I I I O Function Ground Data bit 3 Data bit 4 Data bit 5 Data bit 6 Data bit 7 Card enable 1 Address bit 10 Output enable Address bit 11 Address bit 9 Address bit 8 Address bit 13 Address bit 14 Write Enable Ready/Busy Supply Voltage P rog. Voltage Address bit 16 Address bit 15 Address bit 12 Address bit 7 Address bit 6 Address bit 5 Address bit 4 Address bit 3 Address bit 2 Address bit 1 Address bit 0 Data bit 0 Data bit 1 Data bit 2 Write Potect Ground Active P in Signal name 35 GND 36 CD1# 37 DQ11 38 DQ12 39 DQ13 40 DQ14 41 DQ15 42 CE2# 43 VS1 44 N . C. 45 N . C. 46 A17 47 A18 48 A19 49 A20 50 A21 51 Vc c 52 Vpp2 53 A22 54 A23 55 A24 56 A25 57 VS2 58 N . C. 59 Wait# 60 N . C. 61 REG# 62 BV D 2 63 BV D 1 64 D Q8 65 D Q9 66 DQ10 67 CD2# 68 GND I/O O I/O I/O I/O I/O I I O Function Ground Card Detect 1 Data bit 11 Data bit 12 Data bit 13 Data bit 14 Data bit 15 Card Enable 2 Voltage Sense 1 Active LOW
LOW LOW
LOW N . C.
LOW N . C. N . C.
I I I I I
I I I I I I I I I I I I/O I/O I/O O
O O I O O I/O I/O O O
Address bit 17 256KB(2) Address bit 18 512KB(2) Address bit 19 1MB(2) Address bit 20 2MB(2) Address bit 21 4MB(2) Supply Voltage P rog. Voltage N . C. Address bit 22 8MB(2,4) N . C. N . C. N . C. Voltage Sense 2 N . C. Extended Bus Cycle Attrib Mem Select Bat. Volt. Detect 2 Bat. Volt. Detect 1 Data bit 8 Data bit 9 Data bit 10 Card Detect 2 Ground Low Low (3)
HIGH
LOW
Notes: 1. CD1# and CD2# are grounded internal to PC Card. 2. Shows density for which specified address bit is MSB. Higher order address bits are no connects (i.e., 1MB A19 is MSB, A20 - A21 are NC). 3. BVD1 is an open drain output with a 10K ohm internal pull-up resistor. 4. Address bit 22 is used for the 8MB cards as well as the 6MB Cards.
February 2002 Rev. 6
2
PC Card Products
PCMCIA SRAM Memory Card
SRA Series Mechanical Type I
Interconnect area 1.6mm ± 0.05 (0.063") 10.0mm MIN (0.400") 3.0mm MIN
1.0mm ± 0.05 (0.039")
Substrate area
54.0mm ± 0.10 (2.126")
1.0mm ± 0.05 (0.039")
85.6mm ± 0.20 (3.370")
10.0mm MIN (0.400") 3.3mm ± T1 (0.130") T1=0.10mm interconnect area T1=0.20mm substrate area
Type II
1.6mm ± 0.05 0.063" 85.6mm ± 0.20 3.370"
1.0mm ±0.05 0.039'
3.0mm MIN.
Substrate area
54.0mm ± 0.10 2.126"
1.0mm ±0.05 0.039'
10.0mm MIN 0.400"
Interconnect area
5.0mm ± T1 0.197"
February 2002 Rev. 6
3
PC Card Products
Others parts begin by sr
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