K9F6408U0B - 64Mbit 8M x8 NAND Flash 44-TSOP2 | Samsung
MPN: K9F6408U0B β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.45 | $44.50 |
| 100 | $3.95 | $395.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.2 | $3,200.00 |
Drop-in alternatives for K9F6408U0B β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
K9F6408U0B-TCB0
β Drop-Inπ Reference alternative (not in catalog)
K9F6408U0B-TIB0
β Drop-Inπ Reference alternative (not in catalog)
K9F6408Q0C
β Drop-Inβ In Stock
$1.31 / Unit
View Datasheet βK9F6408U0B Maximum Ratings & Electrical Characteristics
| Memory Organization | 8M x 8 bit (64Mbit) |
| Memory Type | NAND Flash |
| Operating Voltage (VCC) | 2.7 V to 3.6 V |
| Access Time / Cycle Time | 50 ns |
| Package | 44-TSOP2 |
| Page Size | 528 bytes (512 data + 16 spare) |
| Program/Erase Endurance | 100K program/erase cycles |
| Interface | 8-bit multiplexed command/address/data I/O |
| Write Protect | Yes (WP pin) |
| Ready/Busy Output | Yes (R/B open-drain) |
| Operating Temperature (TCB0 grade) | 0C to 70C |
| Operating Temperature (TIB0 grade) | -40C to 85C |
| Mounting Type | Surface Mount |
| Production Status (per datasheet) | Mass Production (legacy; now obsolete) |
K9F6408U0B 44-tsop2 Pin Configuration Guide
Complete pinout information for K9F6408U0B (44-tsop2 package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for K9F6408U0B.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
K9F6408U0B is suitable for 6 applications: Embedded Boot Code Storage, Industrial Data Loggers, Set-Top Boxes and Consumer Electronics, Printer Firmware Storage, Legacy Networking Equipment, Automotive and Rugged Telematics (Legacy Retrofits).
Embedded Boot Code Storage
The K9F6408U0B stores bootloader and firmware images in embedded systems thanks to its 8MB capacity and 2.7V to 3.6V supply that matches 3.3V microcontroller and SoC rails directly. The 8-bit multiplexed command/address/data interface connects to the host memory controller with only CLE, ALE, CE, RE, and WE control lines, while the open-drain R/B output signals program and erase completion. Because it is raw NAND, the host must implement Hamming ECC in the 16-byte spare area and bad-block management, giving roughly 100K program/erase cycles of media life when wear is spread across all 1024 blocks.
Recommended
Industrial Data Loggers
Industrial data-logging equipment uses the K9F6408U0B to retain measurement history across power cycles, valuing its non-volatile NAND storage and -40C to 85C capability in the K9F6408U0B-TIB0 industrial temperature grade. The 50ns access time supports fast sequential reads when records are uploaded, while page programming writes sensor samples efficiently in 512-byte pages. Designers should implement a power-fail routine that aborts in-flight page programs on brown-out, since interrupting a program cycle within the 2.7V to 3.6V operating window can corrupt the active page; block-level wear leveling across the device extends service life toward the specified 100K cycles.
Recommended
Set-Top Boxes and Consumer Electronics
Set-top boxes, DVD players, and consumer appliances of the K9F6408U0B era used this device for channel maps, settings, and firmware storage, exploiting its low cost per bit and compact 44-TSOP2 footprint on cost-sensitive PCBs. The 8MB organization comfortably stores configuration plus fallback firmware, and the WP pin allows hardware write protection once provisioning is complete, preventing accidental corruption by buggy software. Replacement sourcing today is limited to residual stock; for service and repair of this equipment class, K9F6408U0B-TCB0 and K9F6408U0B-TIB0 remain the correct pin-compatible spares.
Recommended
Printer Firmware Storage
Laser and inkjet printers used small NAND devices like the K9F6408U0B to store firmware, fonts, and page-description resources, since 8MB suffices for these assets and the device's 50ns serial access keeps boot time acceptable. The standard Samsung small-block command set allowed one host driver to manage firmware updates by reprogramming designated blocks after erase, with status-command polling confirming each successful page write. Its 2.7V to 3.6V supply integrated cleanly with 3.3V printer mainboards, and the surface-mount TSOP2 package supported automated assembly in high-volume manufacturing.
Recommended
Legacy Networking Equipment
Routers, switches, and access points from the late 1990s and 2000s stored their OS images and configurations in K9F6408U0B-class NAND, combining 8MB of density with the economy of small-block SLC NAND. The multiplexed 8-bit I/O bus kept the host interface to about a dozen signals, simplifying layout around the network processor, while the open-drain R/B line allowed simple polling or interrupt-driven completion detection. Maintenance teams repairing this installed base should hold K9F6408U0B-TCB0/TIB0 spares, since the part is obsolete and no cross-brand 44-TSOP2 drop-in exists.
Recommended
Automotive and Rugged Telematics (Legacy Retrofits)
Retrofit and aftermarket telematics modules requiring extended temperature range can use the K9F6408U0B-TIB0 grade, which is rated from -40C to 85C in the same 44-TSOP2 footprint as the commercial part. Its 100K program/erase endurance supports moderate write traffic when the host applies wear leveling and reserves spare blocks, and the WP pin provides a hardware interlock for calibration data written once at the factory. Note this device is not AEC-Q100 qualified; for new automotive designs, select a qualified modern NAND rather than this legacy generation.
Recommended
Recommended Products Summary
Engineering reference data for K9F6408U0B β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | K9F6408U0B-TCB0 | K9F6408U0B-TIB0 | K9F6408Q0C |
|---|---|---|---|---|
| Package | 44-TSOP2 | 44-TSOP2 - same | 44-TSOP2 - same | [DATA_NEEDED] |
| Brand | Samsung Electronics | Samsung Electronics | Samsung Electronics | Samsung Electronics |
| Density / Organization | 64Mbit (8M x 8) | 64Mbit (8M x 8) | 64Mbit (8M x 8) | 64Mbit (8M x 8) |
| Supply Voltage | 2.7 V to 3.6 V | 2.7 V to 3.6 V | 2.7 V to 3.6 V | [DATA_NEEDED] |
| Access Time | 50 ns | 50 ns | 50 ns | [DATA_NEEDED] |
| Operating Temperature | 0C to 70C (TCB0) / -40C to 85C (TIB0) | 0C to 70C | -40C to 85C | [DATA_NEEDED] |
| Endurance | 100K program/erase cycles | 100K program/erase cycles | 100K program/erase cycles | [DATA_NEEDED] |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | [DATA_NEEDED] |
Key Differentiators
- Extended industrial temperature option (vs K9F6408U0B-TCB0)
- Guaranteed same-family compatibility (vs K9F6408Q0C)
- Compact legacy footprint (vs K9F1208U0B)
Design Notes
The K9F6408U0B is raw NAND: the host controller must implement ECC (a Hamming code with single-bit correction per 512-byte sector stored in the 16-byte spare area) and bad-block management. The datasheet revision history notes endurance changed from 1 million to 100K program/erase cycles - do not design write budgets around the older figure. Also, never interrupt a page program or block erase; ensure VCC stays within 2.7V to 3.6V and use the WP pin during power transitions to prevent spurious writes.
Decouple VCC with 0.1uF ceramic capacitors placed within a few millimeters of each VCC pin on the 44-TSOP2 package, since program and erase operations draw transient currents on the 2.7V to 3.6V rail. Keep the CE, CLE, ALE, RE, and WE control lines short and routed away from the I/O bus to prevent glitch-induced command corruption. The open-drain R/B output requires a pull-up resistor (typical 10k ohm) to VCC.
Estimated: NAND program/erase currents are transient (tens of mA peaks on the 2.7V to 3.6V rail per legacy small-block NAND design practice). Size the 3.3V supply with headroom above the average read current and ensure supply rise-time and power-up sequencing meet the datasheet power-up waveform requirements so the internal command register initializes cleanly before the first access.
Compliance Information
This part predates modern RoHS/REACH documentation requirements; no compliance data was found in the provided sources. Not AEC-Q100 qualified - not designed for automotive use.
