CompactFlash Cards™

To this day, CompactFlash™ (CF) cards are still a very popular Flash based storage solution used in the embedded and industrial markets and the CompactFlash™ Card form factor and connector are well established. Swissbit‘s CF Cards were developed with strong focus on quality, reliability, robustness and longevity. We only select high-quality components and apply design rules fitting the stringent requirements of our customers. Hardware and firmware were tested and qualified by our experienced technical team and features and functionality have been proven in many challenging customer applications.

Swissbit‘s CF Series C-350, C-4×0 and C-5×0 are offered in both, commercial (0°C to 70°C) and industrial (-40°C to 85°C) temperature ranges, providing rugged and reliable memory for a wide range of demanding use cases. They are designed to solve a broad range of concerns from compatibility, booting and Power Fail Safety to long-term supply, controlled BOM and outstanding Flash protocol handling techniques to ensure highest possible data integrity. In contrast to commonly promoted sequential performance values, Swissbit is especially focused on optimized random access speed, one of the key requirements in legacy embedded CompactFlash applications.

The C-350 CF Card ensures optimized backward compatibility to legacy systems with an expected availability of more than 7 years. The series offers low densities from 32 MB to 256 MB using highly reliable SLC Flash with 100’000 program / erase cycles.

Swissbit’s most recent CF Card product families are C-500, and C-56 which are using page based Flash management and thus provide highest write IOPS rate as well as outstanding endurance

Series Name









CFA5.0 / CFA6.1 compatible

Data Transfer Mode

True IDE / PC card – Up to UDMA4, MDMA4 & PIO6

True IDE / PC card – Up to


CFC Type I

Outline Dimensions

36.4 x 42.8 x 3.3 mm

Flash Type



Density Range

128 MB to 256 MB

128 MB to 1 GB

2 to 64 GB

512 MB to 64 GB

4 to 64 GB


Replacement for C-300/


for new designs

Data Retention

10 years @ life begin
1 year @ life end

Endurance [DWPD]

JESD219 Enterprise Endurance Workload

max 0.76


max 0.92

max 3.50

max 1.11

Operating Temperature

Commercial: 0°C to +70°C

Industrial: -40°C to +85°C

Storage Temperature

-40°C to +85°C


Sequential Read (MB/s)

Sequential Write (MB/s)

Random 4KB Read (IOPS)

Random 4KB Write (IOPS)


up to 19.8
up to 11.4
up to 2,900
up to 20


up to 22
up to 9
up to 3,700
up to 54


up to 65
up to 35
up to 2,400
up to 300 (w. Trim)


up to 64
up to 44
up to 3,200
up to 1,900


up to 115
up to 66
up to 5,000
up to 3,300


≥ 3,000,000 hours


1,500 G


20 G


85 % RH 85°C, 1,000 hrs


3.3 V ± 5 %
5 V ± 10 %

Power Consumption

PIO typ 50 mA @ 3.3 V
DMA typ 70 mA @ 3.3 V
DMA typ 110 mA @ 5 V

PIO typ 60 mA @ 3.3 V

DMA typ 80 mA @ 3.3 V
DMA typ 90 mA @ 5 V

max 120 mA
Idle 4.5 mA

max 130 mA
Idle 4.5 mA

Features & Tools

Proven Power Fail Safety

Sophisticated Wear Leveling & Bad Block management

Security & SBZoneProtection features available

SBLTM Tool & SDK for S.M.A.R.T. based Life Time Monitoring

Proven Power Fail Safety

Sophisticated Wear Leveling & Bad

Bad Block Management

Read Disturb Management


Security & SBZoneProtection features available

SBLTM Tool & SDK for S.M.A.R.T.

based Life Time Monitoring

Page based FTL for maximum Endurance
Proven Power Fail Safety

Sophisticated Wear Leveling & Bad

Bad Block Management

Read Disturb Management

SBLTM Tool & SDK for S.M.A.R.T.

based Life Time Monitoring

Data care management
Data Care Management

Various effects like data retention, read disturb limits, or temperature can impact data reliability. The latest generation of Swissbit products use special methods to maintain and refresh the data for higher data integrity.

Electrostatic discharge and electromagnetic interference
ESD and EMI safe

The product designs are in line with the latest regulations for electrostatic discharge and electromagnetic interference. Swissbit strives to exceed these limits with our own in-house technology and production capabilities, for example with System-in-Package (SiP) competence.

Life Time Monitoring (LTM)
Life time monitoring (LTM)

The Swissbit Life Time Monitoring feature enables users to access the memory device’s detailed Life Time Status and allows prediction of imminent failure, avoiding unexpected data loss. This feature uses an extended S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) interface or vendor-specific commands to retrieve the Flash product information.

Power Fail Protection & Recovery
Power fail protection

Intelligent Power Fail Protection and Recovery protects data from unexpected power loss. During an unintentional shutdown, firmware routines and an intelligent hardware architecture ensure that all system and user data will be stored to the NAND.

Secure erase
Secure erase (Sanitize / Purge) / Fast erase

This feature uses an uninterruptable sequence of data erase commands. Even a power off can’t stop the process, which will continue upon restoration of power. The optional enhanced feature allows the customer to sanitize the data according to different standards like DoD, NSA, IREC, etc. The purge algorithm can be started by a software command or through a hardware pin.

Shock & Vibration
Shock and vibration

Robustness is one of our key specification targets. The design, assembly and use of selected materials guarantee an extremely solid design which has been validated by extensive testing.

Write Amplification Factor
WAF reduction

The WAF (write amplification factor) for MLC-based products is reduced by combining a paged based FW block management with a powerful card architecture and configuration settings.

Wear leveling
Wear leveling

Sophisticated Wear Leveling and Bad Block Management ensure that Flash cells are sparingly and equally used in order to prolong life time of the device.

Wide temperature support
Wide temperature support

Swissbit‘s embedded memory and storage solutions are designed and approved for reliable operation over a wide temperature range. The products are verified at temperature corners and prestressed with a burn-in operating functional test (Test During Burn In – TDBI).