DS2229-85

DS2229-85 Datasheet


DS2229 Word-Wide 8 Meg SRAM Stik

Part Datasheet
DS2229-85 DS2229-85 DS2229-85 (pdf)
PDF Datasheet Preview
DS2229 Word-Wide 8 Meg SRAM Stik

Organized as a high density 512k x 16 bit StikTM Fast access time of 85 ns Unlimited write cycles Employs popular JEDEC standard 80-position SIMM connector Full ±10% operating range Read cycle time equals write cycle time Ultra-low standby current < 10 µA Suitable for battery-backed applications

PIN ASSIGNMENT
1M SRAM
1M SRAM
1M SRAM
1M SRAM
80-PIN SIP STIK

The DS2229 is an 8,388,608-bit low-power fully static Random Access Memory organized as a 524,888
word by 16 bits using CMOS technology. The device employs the popular JEDEC standard 80-pin SIMM
connection scheme with no additional circuitry required. The device operates from a single power supply
with a voltage input of to volts. The Chip Enable inputs CE0 , CE1 , CE2 , CE3 are used for
device selection and can be used in order to achieve the minimum standby current mode which facilitates
battery backup. The device provides a fast access time of 85 ns. The DS2229 maintains TTL levels over
input voltage range 4.5V to 5.5V. The DS2229 is JEDEC pin compatible see Figure 1 with flash

EEPROM memory SIMM boards of similar density.
1 of 10
112099

PIN DESCRIPTION Figure 1

DS2229

PIN # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

PIN NAME GND VCC NC

NC CS NC

GND NC

PIN # 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62

PIN NAME NC A16 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 GND DQ15 DQ14 DQ13 DQ12 DQ11 DQ10 DQ9 DQ8

PIN # 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

PIN NAME DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 NC VCC NC GND NC GND NC GND

PIN NAME A0 - A16

WEL WEH OE

NC CE0 - CE3 CS DQ0 - DQ15 VCC GND

DESCRIPTION Address Input Write Enable Input Low Write Enable Input High Output Enable Input No Connect Chip Enable Input Chip Select Data Input/Output +5 Volts Ground
2 of 10

DS2229 STATIC RAM MODULE FUNCTION DIAGRAM Figure 2

DS2229
3 of 10

ABSOLUTE MAXIMUM RATINGS*

Power Supply Voltage Input, Input/Output Voltage Operating Temperature Storage Temperature
-0.3V to +7.0V to VCC +0.3V 0°C to 70°C -55°C to +125°C

DS2229
* This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
More datasheets: AT91M55800-33AI | ECS-.327-12.5-32-TR | 74ACT16245SSCX | 74ACT16245MTDX | 74ACT16245MTD | 74ACT16245SSC | 74AC05SC | 74AC05SCX | FQD5N15TF | 2943


Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived DS2229-85 Datasheet file may be downloaded here without warranties.

Datasheet ID: DS2229-85 508393