Part A
AM1802EZWTD3
德州儀器
- Lifecycle
- Active
- Stock
- 3390 件
- Package
- NFBGA-361
- Series
- 嵌入式微處理器
Replacement verdict
Not a drop-in replacement
The AM1802EZWTD3 and AM1808BZCED4 are both Sitara ARM9-based applications processors from Texas Instruments, but they differ in core clock speed, on-chip memory, package and pinout, and operating temperature range. These differences prevent direct board-level substitution without redesign and validation.
Different core clock speed
Different on-chip memory
Different package and pinout
Different temperature range
Parts at a glance
Part B
AM1808BZCED4
德州儀器
- Lifecycle
- Active
- Stock
- 7974 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 | AM1802EZWTD3 | AM1808BZCED4 | Why it matters |
|---|---|---|---|
| Core Architecture | ARM926EJ-S (ARM9) | ARM926EJ-S (ARM9) | Both use the same ARM9 core, so instruction set and software compatibility are preserved. |
| Maximum Clock Frequency | 300 MHz | 456 MHz | Higher clock speed in the AM1808 provides more processing headroom for demanding applications. |
| On-Chip RAM | 8 KB | 128 KB | Larger on-chip RAM reduces external memory dependency and improves performance for buffering and code execution. |
| Package / Pin Count | 361-ball NFBGA (ZWT) | 361-ball NFBGA (ZCE) | Package and pinout compatibility determine whether a drop-in board replacement is feasible. |
| Operating Temperature Range | 0°C to 85°C (commercial) | -40°C to 90°C (extended) | Extended temperature support in the AM1808 enables use in harsher industrial environments. |
| Ethernet MAC | 10/100 Mbps EMAC | 10/100 Mbps EMAC | Both integrate an Ethernet MAC, supporting networked embedded designs without external controllers. |
| USB Support | USB 2.0 High-Speed OTG | USB 2.0 High-Speed OTG | USB OTG enables flexible host/device connectivity for peripherals and data transfer. |
| LCD Controller | Not available | Integrated LCD controller | The AM1808 can directly drive displays, while the AM1802 requires external display hardware. |
| uPP (Universal Parallel Port) | Not available | Integrated uPP | The uPP in the AM1808 supports high-speed parallel data interfaces for FPGA/DSP connections. |
| MMC/SD Controller | 2x MMC/SD | 2x MMC/SD | Both support SD/MMC storage, enabling removable flash and boot media options. |
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 | AM1802EZWTD3 | AM1808BZCED4 |
|---|---|---|
| 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 | 300MHz | 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 |
| Ethernet | 10/100Mbps (1) | 10/100Mbps (1) |
| SATA | - | SATA 3Gbps (1) |
| USB | USB 2.0 + PHY (1) | USB 1.1 + 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) | -40°C ~ 90°C (TJ) |
Frequently asked questions
What are the key differences between the AM1802EZWTD3 and the AM1808BZCED4?
The AM1802EZWTD3 is an ARM926EJ-S based Sitara processor in a 361-ball NFBGA (ZWT) package, while the AM1808BZCED4 is a higher-featured ARM926EJ-S Sitara processor in a 361-ball NFBGA (ZCE) package. The AM1808BZCED4 includes additional peripherals such as a uPP (universal parallel port), an LCD controller, and a SATA controller that are not present on the AM1802. Both operate at an ARM core frequency of 375 MHz and share the same 361-ball BGA footprint family, but the ZWT and ZCE package designators indicate different ball maps and thermal characteristics.
Are the AM1802EZWTD3 and AM1808BZCED4 pin-to-pin compatible?
No. Although both devices are packaged in a 361-ball NFBGA, the AM1802EZWTD3 uses the ZWT package designator and the AM1808BZCED4 uses the ZCE package designator. These are distinct package outlines with different ball assignments, so they are not drop-in replacements. A board designed for one device cannot accept the other without a PCB redesign and validation against the respective datasheets.
What is the ARM core frequency and operating temperature range for each device?
Both the AM1802EZWTD3 and the AM1808BZCED4 are specified at an ARM926EJ-S core frequency of 375 MHz. The AM1802EZWTD3 is rated for the commercial temperature range of 0°C to 70°C (the "D3" speed/grade suffix), while the AM1808BZCED4 is rated for the extended temperature range of -40°C to 90°C (the "ED4" suffix). Designers should confirm the exact temperature grade against the manufacturer datasheet for the specific orderable part number.
Does the AM1808BZCED4 offer peripherals that the AM1802EZWTD3 lacks?
Yes. The AM1808BZCED4 integrates additional peripherals not available on the AM1802EZWTD3, including a universal parallel port (uPP), an LCD controller, and a SATA controller. The AM1802EZWTD3 is a reduced-feature variant of the AM180x family and omits these blocks. Engineers selecting between the two should map required interfaces against the peripheral set documented in each device's datasheet.
Can the AM1802EZWTD3 be substituted with the AM1808BZCED4 in an existing design?
Not as a direct drop-in. Because the two parts use different package designators (ZWT vs ZCE) with different ball maps, and because the AM1808BZCED4 exposes additional peripherals, substitution requires a PCB redesign, revalidation of power sequencing, and confirmation that the extended temperature grade and peripheral differences are acceptable for the target application. Always verify against the official manufacturer datasheets before substituting.
What memory and interface support do these Sitara processors provide?
Both the AM1802EZWTD3 and AM1808BZCED4 are based on the ARM926EJ-S core and support the AM180x family memory interfaces, including DDR2/mDDR and asynchronous memory (EMIFA), along with common serial interfaces such as UART, SPI, I2C, and USB. The AM1808BZCED4 additionally provides the uPP, LCD, and SATA blocks noted above. Exact memory speed grades and interface counts should be confirmed in the respective manufacturer datasheets.
Which device should be chosen for an extended-temperature industrial application?
The AM1808BZCED4 is the appropriate choice for extended-temperature environments because its "ED4" suffix denotes an extended temperature rating of -40°C to 90°C, whereas the AM1802EZWTD3 "D3" suffix corresponds to the commercial 0°C to 70°C range. The AM1808BZCED4 also adds peripherals such as uPP, LCD, and SATA. Final selection should be validated against the manufacturer's orderable part number documentation and the application's thermal requirements.