AT45DB321-TC

AT45DB321-TC Datasheet


The AT45DB321 is a 2.7-volt only, serial-interface Flash memory suitable for in-sys-

Part Datasheet
AT45DB321-TC AT45DB321-TC AT45DB321-TC (pdf)
Related Parts Information
AT45DB321-TI AT45DB321-TI AT45DB321-TI
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• Single 2.7V - 3.6V Supply
• Serial-interface Architecture
• Page Program Operation

Single Cycle Reprogram Erase and Program
8192 Pages 528 Bytes/Page Main Memory
• Optional Page and Block Erase Operations
• Two 528-byte SRAM Data Buffers Allows Receiving of Data while Reprogramming of

Nonvolatile Memory
• Internal Program and Control Timer
• Fast Page Program Time 7 ms Typical
• 120 µs Typical Page to Buffer Transfer Time
• Low-power Dissipation
4 mA Active Read Current Typical
3 µA CMOS Standby Current Typical
• 13 MHz Max Clock Frequency
• Hardware Data Protection Feature
• Serial Peripheral Interface SPI Compatible Modes 0 and 3
• CMOS and TTL Compatible Inputs and Outputs
• Commercial and Industrial Temperature Ranges

The AT45DB321 is a 2.7-volt only, serial-interface Flash memory suitable for in-sys-
tem reprogramming. Its 34,603,008 bits of memory are organized as 8192 pages of
528 bytes each. In addition to the main memory, the AT45DB321 also contains two

SRAM data buffers of 528 bytes each. The buffers allow receiving of data while a
page in the main memory is being reprogrammed. Unlike conventional Flash memo-
continued

Pin Configurations

CBGA Top View Through Package

Pin Name Function
12345

CS SCK SI SO

RESET RDY/BUSY

Chip Select Serial Clock Serial Input Serial Output Hardware Page Write Protect Pin Chip Reset Ready/Busy

D NC SCK GND VCC NC

E NC CS RDY/BSY WP NC

F NC SO SI RESET NC

TSOP Top View

Type 1

RDY/BUSY 1 RESET 2 WP 3 NC 4 NC 5 NC 6 VCC 7 GND 8 NC 9 NC 10 NC 11 NC 12 CS 13 SCK 14 SI 15 SO 16
32 NC 31 NC 30 NC 29 NC 28 NC 27 NC 26 NC 25 NC 24 NC 23 NC 22 NC 21 NC 20 NC 19 NC 18 NC 17 NC
32-megabit 2.7-volt Only Serial AT45DB321

Recommend using AT45DB321B for new designs.

AT45DB321 Preliminary 16Megabit 2.7-volt Only Serial DataFlash
ries that are accessed randomly with multiple address lines and a parallel interface, the DataFlash uses a serial interface to sequentially access its data. The simple serial interface facilitates hardware layout, increases system reliability, minimizes switching noise, and reduces package size and active pin count. The device is optimized for use in many commercial and industrial applications where high density, low pin count, low voltage, and low power are essential. Typical applications for the DataFlash are digital voice storage, image storage, and data storage. The device operates at clock frequencies up to 13 MHz with a typical active read current consumption of 4 mA.

To allow for simple in-system reprogrammability, the AT45DB321 does not require high input voltages for programming. The device operates from a single power supply, 2.7V to 3.6V, for both the program and read operations. The AT45DB321 is enabled through the chip select pin CS and accessed via a three-wire interface consisting of the Serial Input SI , Serial Output SO , and the Serial Clock SCK .

All programming cycles are self-timed, and no separate erase cycle is required before programming.

Block Diagram

FLASH MEMORY ARRAY

PAGE 528 BYTES

SCK CS

RESET VCC GND

RDY/BUSY

BUFFER 1 528 BYTES

BUFFER 2 528 BYTES

I/O INTERFACE
Ordering Information
fSCK MHz 13

ICC mA

Active

Standby
Ordering Code AT45DB321-TC AT45DB321-CC AT45DB321-TI AT45DB321-CI

AT45DB321

Package 32T 44C1 32T 44C1

Operation Range Commercial 0°C to 70°C Industrial
-40°C to 85°C
32T 44C1

Package Type 32-lead, Plastic Thin Small Outline Package TSOP 44-ball 5 x 9 Array , mm Pitch, Plastic Chip-scale Ball Grid Array CBGA

Packaging Information
32T, 32-lead, Plastic Thin Small Outline Package TSOP Dimensions in Millimeters and Inches *

JEDEC OUTLINE MO-142 BD

INDEX MARK
*Controlling dimension millimeters
44C1, 44-ball 5 x 9 Array , mm Pitch, Plastic Chip-scale Ball Grid Array CBGA Dimensions in Millimeters and Inches *
54 3 21

DIA BALL TYP

NON-ACCUMULATIVE
*Controlling dimension millimeters

AT45DB321

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e-mail

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Datasheet ID: AT45DB321-TC 519047