128MB to 8GB
USB Flash Disk Module
www.stec-inc.com
SLUFDMxxx(M/G)U1U(I)-y
USB Solid-State Flash Disk
Capacity: 128MB - 8GB
USB 2.0 Compliant
Form Factors:
Horizontal Mount
Standard and Low Profile
Connector
General Description
USB Flask Disk Module (UFDM) provides non-volatile, solid-state storage in a compact
design, making it perfectly suited for embedded applications. STEC’s patented IC
®
Tower stacking technology make it possible to provide the UFDM in capacities up to
8GB, the highest in the industry. The standard USB 2.0 interface provides designers
with a true plug-n-play storage device, allowing for short design cycles and fast time to
market.
STEC’s proprietary state-of-the-art USB 2.0 flash memory controller is incorporated in
the UFDM, providing high data reliability and endurance. The flash management
software that is embedded in the controller emulates a hard disk, enabling read/write
operations that are identical to a standard, sector-based hard disk. Sophisticated wear
leveling algorithms guarantee 2,000,000 Write/Erase Cycles, while automatic bad block
management and a built-in ECC Engine guarantee the highest data reliability. Based on
the Reed-Solomon algorithm, the ECC engine can detect up to 5-byte errors and correct
up to 4-byte errors per 512 bytes.
USB Flash Disk Module is available with a standard 2.54mm connector or a 2.0mm low
profile connector, specifically suited for designs that have Z-height constraints.
High performance, high reliability and low cost per MByte make the USB Flash Disk
Module the product of choice in embedded applications, such as Gaming, POS
Workstations, Networking Equipment and Industrial PCs.
STEC offers value-added services to OEM customers, such as customized form factors
and test solutions, custom firmware, controlled Bill Of Materials, customer-specific
labeling and serialization.
High Reliability:
Endurance Guarantee of 2,000,000
Write/Erase Cycles
Built-in Wear-leveling
5 Bytes Detect/4 Bytes Correct
EDC/ECC
Automatic Bad Block Management
Single Level Cell (SLC) NAND
Flash Memory
10 Year Data Retention
Ordering Information: USB Flash Disk Module
Part Number
SLUFDM128MU1U(I)-y
SLUFDM256MU1U(I)-y
SLUFDM512MU1U(I)-y
SLUFDM1GU1U(I)-y
SLUFDM2GU1U(I)-y
SLUFDM4GU1U(I)-y
SLUFDM8GU1U(I)-y
FDM Form Factor
y=A, B
y=A, B
y=A, B
y=A, B
y=A, B
y=A, B
y=A, B
Capacity
128 MBytes
256 MBytes
512 MBytes
1 GBytes
2 GBytes
4 GBytes
8 GBytes
Unique Serial Number
Commercial and Industrial Operating
Temperature
RoHS-6 Compliant
Legend:
SLUFDM =
STEC standard USB Flash Disk Module part number prefix.
(M/G) =
proceeding capacity (xxx) is in MBytes (M) or GBytes (G).
U1 =
STEC U1 controller
U =
RoHS-6 compliant
Part numbers without (I) =
Commercial Temperature Range (0ºC to 70ºC).
(I) =
Industrial Temperature Range (-40ºC to +85 ºC).
(y) =
A for standard 7.4mm
height connector
(y) =
B for low profile 3.6mm
height connector
SLUFDMxxx(M/G)U1U(I)-y
Datasheet
Table of Contents
USB Flash Disk Module
General Description ................................................................................................................. 1
Ordering Information: USB Flash Disk Module ..................................................................... 1
1.0 Introduction....................................................................................................................... 3
2.0 Product Specifications ..................................................................................................... 4
2.1 Mechanical Dimensions................................................................................................................ 4
2.1.1 Standard .................................................................................................................................... 4
2.1.2 Low Profile ................................................................................................................................ 5
2.2 Pin Assignment............................................................................................................................. 6
2.3 Signal Description ......................................................................................................................... 6
2.4 Performance ................................................................................................................................. 6
3.0 Theory of Operation ......................................................................................................... 7
3.1 Block Diagram .............................................................................................................................. 7
3.1.1 Controller Internal Components ................................................................................................ 7
3.1.2 Controller external components ................................................................................................ 8
3.2 Flash Management ....................................................................................................................... 8
3.2.1 Bad Block Management ............................................................................................................ 8
3.2.2 Wear Leveling ........................................................................................................................... 9
3.2.3 Error Correction/Detection ........................................................................................................ 9
3.2.4 Power Failure Management ...................................................................................................... 9
3.3 OS and Boot Support ................................................................................................................. 10
3.3.1 Using USB Flash Disk Module with XP Embedded ................................................................ 10
3.4 Unique Serial Number ................................................................................................................ 11
4.0 Environmental Specifications .........................................................................................12
4.1
4.2
4.3
4.4
4.5
4.6
Recommended Operating Conditions ........................................................................................ 12
Reliability .................................................................................................................................... 12
Shock, Vibration, and Humidity .................................................................................................. 12
Electrostatic Discharge (ESD) .................................................................................................... 13
Mean Time Between Failure (MTBF) ......................................................................................... 13
Standards Compliance ............................................................................................................... 13
5.0 Electrical Specifications .................................................................................................14
5.1 Absolute Maximum Ratings ........................................................................................................ 14
5.2 DC Characteristics...................................................................................................................... 14
5.3 AC Characteristics ...................................................................................................................... 15
6.0 Evaluating USB Flash Disk Module ................................................................................16
7.0 Product Marking ..............................................................................................................17
8.0 Revision History ..............................................................................................................18
61000-03606-121, May 2008
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SLUFDMxxx(M/G)U1U(I)-y
Datasheet
1.0
Introduction
USB Flash Disk Module
This datasheet includes the following sections:
Product Specifications
covers the most referenced specifications, such as mechanical dimensions,
ball assignment, signal description, and performance.
Theory of Operation
explains the USB Flash Disk Module block diagram, and flash management
features.
Environmental Specifications
characterizes the recommended operating conditions, reliability
parameters and shock, vibration and humidity parameters.
Electrical Specifications
describes the absolute maximum ratings and AC/DC characteristics.
Evaluating USB Flash Disk Module
describes how designers can evaluate the USB Flash Disk Module
if there is no 2x5-pin connector yet available on the hardware design.
Product Marking
describes the marking on the USB Flash Disk Module.
Figure 1: USB Flash Disk Module
61000-03606-121, May 2008
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SLUFDMxxx(M/G)U1U(I)-y
Datasheet
2.0
2.1
USB Flash Disk Module
Product Specifications
Mechanical Dimensions
2.1.1 Standard
Table 1 and Figure 2 show the mechanical dimensions of the USB Flash Disk Module–standard form
factor.
Table 1: Mechanical dimensions - standard form factor
Parameter
Length
Width
Height (128MB-4GB)
Height (8GB)
Value
37.80 ± 0.15 mm (1.488 ±. 0.006 in)
26.65 ± 0.15 mm (1.049 ± 0.006 in)
10.27 mm (0.404 in) max
11.16 mm (0.439 in) max
Figure 2: Mechanical dimensions-standard form factor
61000-03606-121, May 2008
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SLUFDMxxx(M/G)U1U(I)-y
Datasheet
2.1.2 Low Profile
USB Flash Disk Module
Table 2 and Figure 3 show the mechanical dimensions of the USB Flash Disk Module–low profile form
factor.
Table 2: Mechanical dimensions – low profile form factor
Parameter
Length
Width
Height (128MB-4GB)
Height (8GB)
Value
37.80 ± 0.15 mm (1.488 ±. 0.006 in)
26.65 ± 0.15 mm (1.049 ± 0.006 in)
6.46 mm (0.254 in) max
7.35 mm (0.289 in) max
Figure 3: Mechanical dimensions–low profile form factor
61000-03606-121, May 2008
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