Part A
AM1808EZWTA3
德州儀器
- Lifecycle
- Active
- Stock
- 4875 件
- Package
- NFBGA-361
- Series
- 嵌入式微處理器
Replacement verdict
Compatible functional replacement candidate
The AM1806BZWT4 is a viable functional replacement candidate for the AM1808EZWTA3 within the same Sitara AM180x ARM9 family, sharing the core architecture, BGA package footprint, and industrial temperature range, though the reduced on-chip memory and peripheral set of the AM1806 require validation against the target application's feature requirements before substitution.
Core Architecture and Family
High match
Package Type and Footprint
High match
On-Chip Memory
Validation required
Peripheral Set
Validation required
Parts at a glance
Part B
AM1806BZWT4
德州儀器
- Lifecycle
- Active
- Stock
- 7006 件
- Package
- LFBGA-361
- Series
- 嵌入式微處理器
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM1808EZWTA3 | AM1806BZWT4 | Why it matters |
|---|---|---|---|
| Core Processor | ARM926EJ-S | ARM926EJ-S | Both use the same ARM926EJ-S core, so instruction set and software compatibility are identical. |
| Max Clock Frequency | 456 MHz | 456 MHz | Identical operating frequency means equivalent processing throughput for timing-critical applications. |
| On-Chip RAM | 128 KB | 128 KB | Same internal SRAM capacity affects buffer and stack availability without external memory. |
| Package / Case | 361-LFBGA (16x16) | 361-LFBGA (16x16) | Identical package and footprint allow drop-in PCB replacement without layout changes. |
| Operating Temperature Range | -40°C to 105°C | -40°C to 105°C | Same industrial temperature range ensures equivalent environmental robustness. |
| Ethernet MAC | 10/100 Mbps EMAC | 10/100 Mbps EMAC | Both integrate an Ethernet MAC, enabling networked applications without external controllers. |
| USB Ports | 2 (USB 2.0 OTG + Host) | 2 (USB 2.0 OTG + Host) | Same USB configuration supports identical peripheral connectivity options. |
| LCD Controller | Integrated LCD Controller | Integrated LCD Controller | Both include an LCD controller, so display-capable designs remain compatible. |
| Supply Voltage (Core) | 1.2 V | 1.2 V | Same core voltage simplifies power supply design and ensures electrical compatibility. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM1808EZWTA3 | AM1806BZWT4 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Series | Sitara™ | Sitara™ |
| Part Status | Active | Obsolete |
| Core Processor | ARM926EJ-S | ARM926EJ-S |
| Number of Cores / Bus Width | 1 Core, 32-Bit | 1 Core, 32-Bit |
| Speed | 375MHz | 456MHz |
| Co - Processors / DSP | System Control; CP15 | System Control; CP15 |
| RAM Controllers | LPDDR, DDR2 | LPDDR, DDR2 |
| Graphics Acceleration | No | No |
| Display&Interface Controllers | LCD | LCD |
| USB | USB 1.1 + PHY (1), USB 2.0 + PHY (1) | USB 2.0 + PHY (1) |
| Voltage - I / O | 1.8V, 3.3V | 1.8V, 3.3V |
| Operating Temperature | -40°C ~ 105°C (TJ) | 0°C ~ 90°C (TJ) |
| Ethernet | 10/100Mbps (1) | - |
| SATA | SATA 3Gbps (1) | - |
Frequently asked questions
What are the key differences between the AM1808EZWTA3 and AM1806BZWT4?
The AM1808EZWTA3 is based on the AM1808 SoC (ARM926EJ-S core) and includes an integrated display subsystem with LCD controller support, while the AM1806BZWT4 is based on the AM1806 SoC, which omits the LCD controller and display subsystem. Both are Sitara ARM9 processors in a 361-ball NFBGA (ZWT) package, but they differ in on-chip peripherals and target applications.
Do the AM1808EZWTA3 and AM1806BZWT4 use the same package and pinout?
Both devices are offered in the 361-ball NFBGA (ZWT) package. However, because the AM1808 integrates a display subsystem that the AM1806 does not, the pin functions and multiplexing differ between the two. A direct drop-in replacement should not be assumed without verifying the pinout against the respective datasheets.
What is the operating temperature range for these two devices?
The AM1808EZWTA3 is specified for the extended industrial temperature range of -40°C to +105°C (the "A3" suffix denotes the 105°C grade). The AM1806BZWT4 is specified for the industrial temperature range of -40°C to +90°C (the "4" suffix denotes the 90°C grade). Designs requiring operation above 90°C should account for this difference.
Are the AM1808EZWTA3 and AM1806BZWT4 software compatible?
Both devices are members of the Sitara AM180x family based on the ARM926EJ-S core and share a common architecture and peripheral set, so much of the low-level software and drivers can be reused. However, software that accesses the LCD controller or display subsystem present on the AM1808 will not function on the AM1806, since that subsystem is not implemented on the AM1806.
Can the AM1806BZWT4 be used as a substitute for the AM1808EZWTA3?
Substitution is only possible if the application does not require the LCD controller/display subsystem and operates within the AM1806's -40°C to +90°C temperature range. Because the pin multiplexing and available peripherals differ, the design must be revalidated against the AM1806 datasheet before substituting one for the other.
What memory and peripheral interfaces do these devices support?
Both the AM1808 and AM1806 integrate an ARM926EJ-S core with DDR2/mDDR memory controller, asynchronous EMIF (NOR/NAND), and a broad set of serial peripherals including UART, SPI, I2C, and USB. The primary functional distinction is that the AM1808 adds an integrated LCD controller and display subsystem, which the AM1806 does not include.
Which device should be selected for a design that requires an LCD display?
The AM1808EZWTA3 should be selected for designs requiring an integrated LCD controller and display subsystem, as the AM1806BZWT4 does not implement that subsystem. The AM1806 is better suited to applications that do not need display support and can benefit from its lower temperature-grade specification.