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 AM1808EZWTA3 and AM1808BZWT3 are functionally compatible Sitara AM1808 ARM926EJ-S applications processors sharing the same core, package, and peripheral set; the extended temperature rating of the EZWTA3 variant is the primary differentiator, so validation against the target thermal profile is recommended before substituting in extended-temperature designs.
Package Type
High match
Core Architecture
High match
Operating Temperature Range
Validation required
Peripheral and Interface Set
High match
Parts at a glance
Part B
AM1808BZWT3
德州儀器
- Lifecycle
- Active
- Stock
- 7191 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 | AM1808BZWT3 | Why it matters |
|---|---|---|---|
| Core Processor | ARM926EJ-S | ARM926EJ-S | Identical CPU core ensures the same instruction set and software compatibility for drop-in substitution. |
| Core Size / Data Bus Width | 32-bit | 32-bit | Same bus width means identical memory addressing and peripheral interfacing behavior. |
| Max Clock Frequency | 456 MHz | 456 MHz | Matching operating frequency guarantees equivalent processing throughput and timing characteristics. |
| Package / Case | 361-LFBGA (16x16) | 361-LFBGA (16x16) | Same package and footprint allow direct PCB replacement without layout changes. |
| Number of I/O | 128 | 128 | Identical I/O count preserves peripheral connectivity options in existing designs. |
| Operating Temperature Range | -40°C to 105°C | -40°C to 105°C | Same temperature rating ensures equivalent environmental robustness for industrial applications. |
| Supply Voltage (Core) | 1.2 V | 1.2 V | Matching core voltage means the same power supply design can be reused. |
| On-Chip RAM | 8KB | 8KB | Same internal SRAM capacity preserves firmware memory allocation and performance. |
| Ethernet / Connectivity | 10/100 Ethernet MAC, USB 2.0, UART, SPI, I2C | 10/100 Ethernet MAC, USB 2.0, UART, SPI, I2C | Identical peripheral set ensures the same communication interfaces are available for system integration. |
| Mounting Type | Surface Mount | Surface Mount | Same mounting method confirms assembly process 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 | AM1808BZWT3 |
|---|---|---|
| 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 | 375MHz |
| 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) | SATA 3Gbps (1) |
| USB | USB 1.1 + PHY (1), 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 ~ 105°C (TJ) | 0°C ~ 90°C (TJ) |
Frequently asked questions
What are the key differences between the AM1808EZWTA3 and AM1808BZWT3?
Both are Sitara AM1808 ARM926EJ-S application processors in a 361-ball NFBGA (ZWT) package. The primary documented difference is the operating temperature range: the AM1808EZWTA3 is rated for the extended industrial temperature range of -40°C to 105°C (junction), while the AM1808BZWT3 is rated for the industrial temperature range of -40°C to 90°C (junction). Core, memory, and peripheral features are otherwise the same AM1808 configuration.
Are the AM1808EZWTA3 and AM1808BZWT3 pin-to-pin and package compatible?
Yes. Both devices use the same 361-ball NFBGA (ZWT) package with identical ball assignments, so they are pin-to-pin compatible and share the same PCB land pattern. The difference is the qualified temperature grade, not the package or pinout.
Can the AM1808BZWT3 be used as a drop-in replacement for the AM1808EZWTA3?
Only if the application's maximum junction temperature stays within the AM1808BZWT3's -40°C to 90°C rating. Because the AM1808EZWTA3 supports operation up to 105°C junction, replacing it with the BZWT3 variant in a design that exceeds 90°C junction would violate the device's specified operating conditions. Thermal analysis of the target design should be performed before substitution.
What CPU core and clock speed do the AM1808EZWTA3 and AM1808BZWT3 use?
Both devices integrate an ARM926EJ-S RISC core running at up to 375 MHz, with 16 KB instruction and 16 KB data caches, 8 KB of RAM, and 128 KB of on-chip ROM. These core parameters are common to the AM1808 ZWT devices.
Do both variants include the same integrated peripherals?
Yes. Both are AM1808 devices and include the same peripheral set: an EMIFA external memory interface, DDR2/mDDR controller, two USB 2.0 OTG ports, three UARTs, two SPI ports, two I2C ports, an LCD controller, a 10/100 Ethernet MAC (EMAC), an SATA controller, and an uPP parallel port, among others. The temperature grade is the distinguishing attribute between the two orderable part numbers.
What is the difference in junction temperature rating between the two parts?
The AM1808EZWTA3 is specified for a junction temperature range of -40°C to 105°C (extended industrial). The AM1808BZWT3 is specified for -40°C to 90°C (industrial). Designs with high ambient temperatures or limited thermal dissipation should account for this 15°C difference in allowable junction temperature.
Are both parts RoHS compliant and lead-free?
Both the AM1808EZWTA3 and AM1808BZWT3 are offered in RoHS-compliant, lead-free (Pb-free) NFBGA packaging per Texas Instruments' standard ordering information. Designers should confirm the specific orderable part number's compliance status against the current TI product page or datasheet before final qualification.