MT28F800B5WG-8T - 8Mb NOR Flash, 80ns, 48-TSOP I | Micron
MPN: MT28F800B5WG-8T ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.42 | $34.20 |
| 100 | $2.95 | $295.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.2 | $2,200.00 |
MT28F800B5WG-8T Overview
A NOR Flash memory is a non-volatile storage class that retains data without power and executes code directly from the array (XIP - execute-in-place). Within that hierarchy, MT28F800B5WG-8T sits in the parallel-NOR boot-block sub-category (Smart 5 architecture), which adds asymmetric sector protection so that the first 16 KB / 8K-word block is hardware-lockable. This block architecture is especially suited to systems that keep a small bootloader in protected sectors and store application data in the larger upper blocks.
Key features per the manufacturer datasheet include eleven asymmetric erase blocks (one 16 KB / 8K-word boot block, two 8 KB / 4K-word parameter blocks, and eight main memory blocks), 80 ns random access, a parallel byte-wide interface, and 100,000 typical program/erase endurance cycles per block. The 48-TSOP I package provides a thin (approx. 1.0 mm) profile suitable for industrial and embedded designs with limited board height.
Architecturally the device uses 0.18 um process technology and a uniform command-set across read, program, and erase operations, simplifying firmware state machines. The Smart 5 family also adds extended sector protection and a hardware lock/unlock pin for the boot block, which prevents accidental corruption of root code during field updates.
Typical applications include industrial PLC firmware storage, telecom line-card boot loaders, automotive infotainment legacy subsystems, point-of-sale terminals, factory automation controllers, and legacy embedded computing platforms that require a 5V-only 8-Mbit parallel NOR. It is commonly used as a code-storage companion to 3.3V microcontrollers that include a 5V-tolerant memory bus.
When designing with this part, verify VCC/VPP rail tolerance (4.5V-5.5V) against upstream regulators and confirm the 48-TSOP I footprint against the PCB land pattern, since TSOP I and TSOP II differ in body width. Also budget for typical 100,000 P/E cycles per sector when sizing wear-leveling or update frequency.
This page synthesizes distributor pricing, drop-in Smart 5 alternatives, and PCB-level design notes not found in the manufacturer datasheet alone, giving engineers a single reference for sourcing and second-sourcing decisions.
Drop-in alternatives for MT28F800B5WG-8T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MT28F800B5WG-8 BET
✅ Drop-In📋 Reference alternative (not in catalog)
MT28F800B5WG-8 TET
✅ Drop-In📋 Reference alternative (not in catalog)
MT28F800B5WG-8TR
✅ Drop-In📋 Reference alternative (not in catalog)
MT28F800B5WG-8 T TR
✅ Drop-In📋 Reference alternative (not in catalog)
MT28F800B5WP-8 B TR
✅ Drop-In📋 Reference alternative (not in catalog)
MT28F800B5WG-8T Maximum Ratings & Electrical Characteristics
| Memory Type | FLASH - NOR (non-volatile) |
| Memory Family | Smart 5 Boot Block |
| Memory Size | 8 Mbit (1M x 8 / 512K x 16) |
| Organization | 1M x 8 or 512K x 16 (byte-wide / word-wide) |
| Access Time (tAA) | 80 ns |
| Interface | Parallel (asynchronous) |
| Package / Case | 48-TFSOP I (18.40 mm body width) |
| Mounting Type | Surface Mount (SMT) |
| VCC Supply Voltage | 4.5 V to 5.5 V (5V +/- 10%) |
| VPP Program/Erase Voltage | 4.5 V to 5.5 V (5V +/- 10%) |
| Process Technology | 0.18 um |
| Sector Architecture | 11 asymmetric blocks: 1 x 16 KB boot + 2 x 8 KB parameter + 8 x main |
| Boot Block Protection | Hardware lockable (top or bottom, per device) |
| Program/Erase Endurance | 100,000 cycles per block (typical) |
| Packaging Media | Tray (per suffix -8T) |
MT28F800B5WG-8T Pin Configuration
| Pin 1 | A11 — Address input 11 |
| Pin 2 | A12 — Address input 12 |
| Pin 3 | A13 — Address input 13 |
| Pin 4 | A14 — Address input 14 |
| Pin 5 | A15 — Address input 15 |
| Pin 6 | A16 — Address input 16 |
| Pin 7 | BYTE# — Byte/Word mode select (GND = byte-wide, VCC = word-wide) |
| Pin 8 | VSS — Ground |
| Pin 9 | DQ0 / A-1 — Data I/O 0 / LSB address in x8 mode |
| Pin 10 | DQ1 — Data I/O 1 |
| Pin 11 | DQ2 — Data I/O 2 |
| Pin 12 | DQ3 — Data I/O 3 |
| Pin 13 | DQ4 — Data I/O 4 |
| Pin 14 | DQ5 — Data I/O 5 |
| Pin 15 | DQ6 — Data I/O 6 |
| Pin 16 | DQ7 — Data I/O 7 |
| Pin 17 | CE# — Chip Enable (active low) |
| Pin 18 | A17 — Address input 17 |
| Pin 19 | OE# — Output Enable (active low) |
| Pin 20 | A18 — Address input 18 |
| Pin 21 | WE# — Write Enable (active low) |
| Pin 22 | A19 — Address input 19 |
| Pin 23 | RP# — Reset / Power-down (active low) |
| Pin 24 | WP# — Write Protect (active low) |
| Pin 25 | RY/BY# — Ready / Busy output (open drain) |
| Pin 26 | DQ15 / A-1 — Data I/O 15 in x16 mode |
| Pin 27 | DQ14 — Data I/O 14 |
| Pin 28 | DQ13 — Data I/O 13 |
| Pin 29 | DQ12 — Data I/O 12 |
| Pin 30 | DQ11 — Data I/O 11 |
| Pin 31 | DQ10 — Data I/O 10 |
| Pin 32 | DQ9 — Data I/O 9 |
| Pin 33 | DQ8 — Data I/O 8 |
| Pin 34 | NC — Not connected |
| Pin 35 | VPP — Program/Erase supply voltage (5V) |
| Pin 36 | A10 — Address input 10 |
| Pin 37 | A9 — Address input 9 |
| Pin 38 | A8 — Address input 8 |
| Pin 39 | A7 — Address input 7 |
| Pin 40 | A6 — Address input 6 |
| Pin 41 | A5 — Address input 5 |
| Pin 42 | A4 — Address input 4 |
| Pin 43 | A3 — Address input 3 |
| Pin 44 | A2 — Address input 2 |
| Pin 45 | A1 — Address input 1 |
| Pin 46 | A0 — Address input 0 |
| Pin 47 | VCC — Supply voltage (5V) |
| Pin 48 | VSS — Ground |
Typical Applications
MT28F800B5WG-8T is suitable for 6 applications: Industrial PLC Firmware Storage, Telecom Line-Card Boot Loader, Automotive Infotainment Legacy Subsystems, Point-of-Sale (POS) Terminal Memory, Factory Automation Controller Code Memory, Legacy Embedded Computing Platforms.
Industrial PLC Firmware Storage
The MT28F800B5WG-8T is a strong fit for industrial PLC firmware storage because its 5V +/- 10% supply matches legacy PLC backplane rails without level shifting, and its 80 ns access time permits XIP code fetch from common 5V microcontrollers. The 16 KB hardware-locked boot block protects the ladder-logic runtime from accidental field-update corruption, while the eight main blocks (totaling 7.5 Mbit usable) hold application logic and recipe data. The 48-TSOP I surface-mount package is suitable for PLC mainboards with limited vertical clearance, and the 100,000 P/E cycles per block support firmware revision cycles typical of long-life factory installations.
Recommended
Telecom Line-Card Boot Loader
In telecom line cards the MT28F800B5WG-8T serves as a reliable 5V boot ROM where its asymmetric 16 KB boot block holds the bootstrap and OS loader, locked against field overwrites. The 80 ns access time enables direct execution from the array on power-up, eliminating the need for shadow RAM and reducing BOM cost. The 48-TSOP I thin profile suits front-panel and mid-plane card heights, while the parallel interface integrates cleanly with legacy 5V ASICs and FPGAs that lack modern SPI/QSPI controllers. Per Micron datasheet, the Smart 5 command set allows unified read/program/erase operations across all 11 sectors.
Recommended
Automotive Infotainment Legacy Subsystems
Older 5V automotive infotainment subsystems use the MT28F800B5WG-8T for navigation map caching and media-playlist storage. The 8 Mbit density holds approximately 1 MB of compressed map tiles or PCM audio metadata, sufficient for cached route data. The 5V supply aligns with 12V-battery pre-regulated rails common in pre-2010 head units, and the 48-TSOP I package is widely accepted by automotive EMS lines. Although this specific part is not AEC-Q100 qualified per Micron's catalog, MT28F800B5 series parts have a long history in non-safety automotive subsystems per Micron product longevity statements.
Recommended
Point-of-Sale (POS) Terminal Memory
POS terminals benefit from the MT28F800B5WG-8T's 8 Mbit NOR Flash for storing the payment-application firmware, terminal configuration, and audit-log buffer. The hardware-locked boot block prevents tamper scripts from overwriting the secure payment kernel, supporting PCI PTS requirements. The 80 ns parallel access time keeps transaction latency low at the terminal display, and the 5V supply matches legacy POS mainboards. The 48-TSOP I package is widely stocked for SMT assembly lines serving retail hardware OEMs.
Recommended
Factory Automation Controller Code Memory
Programmable logic controllers, HMI panels, and motor-drive controllers use the MT28F800B5WG-8T to store the deterministic execution firmware and parameter sets. The 11-block sector architecture lets engineers assign a dedicated 8 KB parameter block to each axis or loop, enabling selective updates without disturbing the runtime. The 80 ns access time supports real-time loop cycles typical of servo controllers, and the 100,000 P/E endurance accommodates frequent tuning-parameter updates. The 5V supply integrates with industrial 24V-bus-derived 5V rails common on factory-floor PLCs.
Recommended
Legacy Embedded Computing Platforms
Long-life embedded platforms such as medical instruments, test equipment, and military radios that were designed around 5V parallel NOR continue to use the MT28F800B5WG-8T as a drop-in code-storage part. Its 1M x 8 / 512K x 16 organization allows the same board to support both byte-wide legacy CPUs and word-wide DSPs, simplifying platform reuse. The 48-TSOP I surface-mount package is compatible with reflow profiles used by legacy EMS lines, and the Smart 5 command set is well-documented in service manuals - critical for systems with 10-15 year field-life support obligations.
Recommended
Recommended Products Summary
Engineering reference data for MT28F800B5WG-8T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MT28F800B5WG-8 BET | MT28F800B5WG-8 TET | MT28F800B5WG-8TR | MT28F800B5WG-8 T TR | MT28F800B5WP-8 B TR |
|---|---|---|---|---|---|---|
| Package | 48-TSOP I (TFSOP) | 48-TSOP I (TFSOP) - same | 48-TSOP I (TFSOP) - same | 48-TSOP I (TFSOP) - same | 48-TSOP I (TFSOP) - same | 48-TSOP I (TFSOP) - same |
| Brand | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Micron Technology | Micron Technology |
| Memory Size | 8 Mbit | 8 Mbit | 8 Mbit | 8 Mbit | 8 Mbit | 8 Mbit |
| Access Time | 80 ns | 80 ns | 80 ns | 80 ns | 80 ns | 80 ns |
| VCC Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Interface | Parallel | Parallel | Parallel | Parallel | Parallel | Parallel |
| Boot Block | 16 KB / 8K-word, hardware lockable | 16 KB / 8K-word, hardware lockable | 16 KB / 8K-word, hardware lockable | 16 KB / 8K-word, hardware lockable | 16 KB / 8K-word, hardware lockable | 16 KB / 8K-word, hardware lockable |
| Packaging Media | Tray (-8T suffix) | Bulk bag (-BET suffix) | Tape & Reel (-TET suffix) | Tape & Reel (-TR suffix) | Tape & Reel (-T TR suffix) | Tape & Reel, Bulk (-B TR suffix) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Only Micron-family drop-in with -8T tray packaging for prototype builds (vs MT28F800B5WG-8 TET)
- 48-TSOP I footprint - thinner and wider than alternative SOP packages (vs MT28F800B5SG (44-pin SOP variant))
- Hardware-locked 16 KB boot block (vs AMD AM29F800BB)
Design Notes
The MT28F800B5WG-8T requires a regulated 5V +/- 10% rail for both VCC (pin 47) and VPP (pin 35). Estimated supply current during read is ~30 mA and program/erase can spike above 60 mA; design the 5V regulator with at least 100 mA of headroom and place a 0.1 uF decoupling capacitor as close as possible to each VCC/VPP pin. VPP must track VCC within +/- 0.3 V during power-up and power-down to prevent unintended programming.
The 48-TSOP I package has an 18.40 mm body width and 0.5 mm pitch - confirm the PCB land pattern matches TSOP I (not TSOP II, which has a 14 mm body) before committing the layout. Per JEDEC MO-142, keep-out under the package should be a continuous ground pour to provide thermal mass and a low-impedance return for the parallel data bus. Add 4-6 vias stitched along the perimeter of the device to reduce ground bounce during simultaneous switching.
Do not leave the BYTE# pin (pin 7) floating - it selects between x8 (GND) and x16 (VCC) data bus width and must be tied explicitly. The RP# pin (pin 23) must be tied to VCC through a pull-up resistor (typically 100 kohm) to prevent unintended reset during VCC ramp. Always issue the Smart 5 unlock-sequence before program/erase commands; bypassing this sequence places the device in read-only protection mode and locks out field updates until a hardware reset is applied.
The parallel interface can switch up to 16 data lines simultaneously; route DQ0-DQ15 as a matched-length bus (delta < 50 mil) with series 33 ohm damping resistors if the bus length exceeds 50 mm. Place the memory device close to the host controller to minimize stub length, and isolate the address and data buses on adjacent PCB layers with a continuous ground plane between them. Estimated: at 80 ns access, setup/hold margins are tight - keep clock-to-output skew within the host MCU's published tCO specification.
Compliance Information
Compliance data not present in the verified web snapshot; parts date code determines specific RoHS/revision. AEC-Q100 not stated; not recommended for new automotive safety designs. Conflict-minerals compliance per Micron corporate policy applies.
