Part A
AM1808EZWTD4
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 4891 PCS
- Package
- NFBGA-361
- Series
- 내장형 마이크로프로세서
Replacement verdict
Compatible functional replacement candidate
The AM1806BZWT4 is a viable functional replacement candidate for the AM1808EZWTD4 in designs that do not require the additional peripheral set and memory interface options of the AM1808. Both devices share the same ARM926EJ-S core, package footprint, and industrial temperature range, but the AM1806 omits the SATA controller, uPP, and certain EMIF/display capabilities present on the AM1808. Engineers should validate peripheral requirements and pin multiplexing before substituting.
Core Architecture
High match
Package Type
High match
Peripheral Set
Validation required
Memory Interface
Validation required
Parts at a glance
Part B
AM1806BZWT4
텍사스 인스트루먼트(주)
- Lifecycle
- Active
- Stock
- 7006 PCS
- Package
- LFBGA-361
- Series
- 내장형 마이크로프로세서
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM1808EZWTD4 | AM1806BZWT4 | Why it matters |
|---|---|---|---|
| Core Processor | ARM926EJ-S | ARM926EJ-S | Both use the same ARM926EJ-S core, so instruction set and software compatibility are preserved. |
| Number of Cores / Bus Width | 1 Core, 32-Bit | 1 Core, 32-Bit | Identical core count and bus width ensure the same processing architecture for drop-in substitution. |
| Speed | 456MHz | 456MHz | Matching clock speed means timing-sensitive firmware and peripherals behave the same. |
| Package / Case | 361-LFBGA | 361-LFBGA | Same package and pin count allow the parts to share a PCB footprint. |
| Operating Temperature | -40°C to 90°C (TJ) | -40°C to 90°C (TJ) | Identical temperature range ensures equivalent environmental robustness. |
| On-Chip RAM | 128KB | 128KB | Same internal SRAM capacity affects buffer and stack behavior in embedded applications. |
| Voltage - I/O | 1.8V, 3.3V | 1.8V, 3.3V | Matching I/O voltage levels ensure direct compatibility with surrounding circuitry. |
| Ethernet | 10/100 Mbps (1) | 10/100 Mbps (1) | Same Ethernet MAC capability preserves networking functionality. |
| USB | USB 2.0 + PHY (2) | USB 2.0 + PHY (2) | Identical USB controller and PHY configuration maintains host/device connectivity options. |
| Display & Interface Controllers | LCD, UART, I2C, SPI, McASP, McSPI, PWM | LCD, UART, I2C, SPI, McASP, McSPI, PWM | Same peripheral set ensures existing drivers and board-level interfaces remain usable. |
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 | AM1808EZWTD4 | 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 | 456MHz | 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 ~ 90°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 AM1808EZWTD4 and AM1806BZWT4?
The AM1808EZWTD4 is based on the AM1808 SoC, which includes an ARM926EJ-S core plus an integrated LCD controller and a SATA controller, while the AM1806BZWT4 is based on the AM1806 SoC, which omits the LCD controller and SATA interface. Both are Sitara ARM9 devices in a 361-ball NFBGA (ZWT) package, but the AM1808EZWTD4 is rated for the extended temperature range (T4, -40°C to 90°C) whereas the AM1806BZWT4 is rated for the commercial temperature range (0°C to 90°C).
Are the AM1808EZWTD4 and AM1806BZWT4 pin-compatible?
Both devices are offered in the same 361-ball ZWT NFBGA package, but they are not functionally interchangeable because the AM1808 exposes LCD and SATA interfaces that the AM1806 does not. Pin-compatibility must be confirmed against the respective datasheets and pin multiplexing tables before any board-level substitution.
What ARM core and clock speed do these devices use?
Both the AM1808EZWTD4 and AM1806BZWT4 integrate an ARM926EJ-S RISC core. The AM1808 is specified up to 456 MHz, and the AM1806 is also specified up to 456 MHz in its highest speed grade; the exact operating frequency must be confirmed from the device-specific datasheet ordering information.
Do both parts include a SATA controller?
No. The AM1808 includes an integrated SATA controller, while the AM1806 does not. Designs requiring SATA connectivity must use the AM1808EZWTD4 or another AM1808 variant.
Do both parts include an LCD controller?
No. The AM1808 integrates an LCD controller, whereas the AM1806 does not include an LCD controller. Applications requiring a display interface should select the AM1808EZWTD4.
What is the operating temperature range difference between the two parts?
The AM1808EZWTD4 carries the T4 temperature suffix, indicating an extended industrial range of -40°C to 90°C. The AM1806BZWT4 carries the T4 suffix as well in its ordering code, but the AM1806 commercial variants are typically rated 0°C to 90°C; the exact range for a given orderable part must be verified from the manufacturer's datasheet ordering table.
What memory and peripheral interfaces are common to both devices?
Both devices share the AM180x platform feature set, including DDR2/mDDR memory support, an EMIFA external memory interface, USB 2.0 OTG and host, Ethernet MAC (EMAC), UART, SPI, I2C, and McASP audio serial ports. The AM1808 adds the LCD and SATA blocks on top of this common peripheral set.
Can the AM1806BZWT4 be used as a drop-in replacement for the AM1808EZWTD4?
No. Because the AM1806 lacks the LCD controller and SATA controller present on the AM1808, and because the temperature grades differ, the AM1806BZWT4 is not a drop-in replacement. Any substitution requires a full review of the pin multiplexing, peripheral requirements, and thermal specifications against the target design.