Part A
AM1808EZWTA3
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 4875 個数
- Package
- NFBGA-361
- Series
- 組み込み - マイクロプロセッサ
Replacement verdict
Compatible functional replacement candidate
The AM1806BZCEA3 is a viable functional replacement candidate for the AM1808EZWTA3, sharing the same ARM926EJ-S core, package footprint, and industrial temperature range, though the reduced on-chip memory and absence of an LCD controller require validation against the target application's memory and display requirements.
CPU Core and Architecture
High match
On-Chip Memory
Validation required
Package Type
High match
Integrated Display Controller
Validation required
Parts at a glance
Part B
AM1806BZCEA3
STマイクロエレクトロニクス
- Lifecycle
- Active
- Stock
- 160 個数
- Package
- LFBGA-361
- Series
- 組み込み - マイクロプロセッサ
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 | AM1806BZCEA3 | Why it matters |
|---|---|---|---|
| Core Processor | ARM926EJ-S | ARM926EJ-S | Both use the same ARM926EJ-S core, so instruction set and software compatibility are preserved. |
| Max Clock Frequency | 456 MHz | 456 MHz | Identical clock speed means timing-sensitive code and peripherals behave the same. |
| Package / Case | 361-LFBGA (16x16) | 361-NFBGA (16x16) | Different package ball-out or substrate type can affect PCB footprint and assembly compatibility. |
| Operating Temperature Range | -40°C to 105°C (TA) | -40°C to 105°C (TA) | Same industrial temperature range supports use in the same environmental conditions. |
| On-Chip RAM | 128KB | 128KB | Equal internal SRAM affects buffer sizes and boot behavior identically. |
| Ethernet MAC | 10/100 Mbps MAC (EMAC) | Not included | The AM1808 includes an on-chip Ethernet MAC while the AM1806 does not, so networked designs cannot be directly substituted. |
| USB Ports | 2 (USB 2.0 OTG + Host) | 2 (USB 2.0 OTG + Host) | Matching USB capability preserves connectivity options for peripherals and host functions. |
| LCD Controller | Integrated LCD controller | Not included | The AM1808 supports direct display interfaces while the AM1806 lacks an LCD controller, limiting display-based designs. |
| Supply Voltage (Core) | 1.2 V | 1.2 V | Same core voltage allows reuse of the same power supply design. |
| Serial Interfaces | UART, SPI, I2C, McASP, McSPI | UART, SPI, I2C, McASP, McSPI | Identical serial peripheral set maintains compatibility with existing board-level connections. |
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 | AM1806BZCEA3 |
|---|---|---|
| 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 |
| 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) | -40°C ~ 105°C (TJ) |
| Ethernet | 10/100Mbps (1) | - |
| SATA | SATA 3Gbps (1) | - |
Frequently asked questions
What are the key differences between the AM1808EZWTA3 and AM1806BZCEA3?
The AM1808EZWTA3 is based on the AM1808 SoC, which includes an ARM926EJ-S core plus an integrated LCD controller and a SATA controller, and it is supplied in a 361-ball NFBGA (ZWT) package. The AM1806BZCEA3 is based on the AM1806 SoC, which uses the same ARM926EJ-S core but omits the LCD controller and SATA interface, and it is supplied in a 361-ball NFBGA (ZCE) package. Both are Sitara ARM processors from Texas Instruments, but the AM1808 offers additional display and storage interfaces that the AM1806 does not.
Are the AM1808EZWTA3 and AM1806BZCEA3 pin-compatible?
No. Although both devices are packaged in a 361-ball NFBGA, the AM1808EZWTA3 uses the ZWT package and the AM1806BZCEA3 uses the ZCE package. These are distinct package designators with different ball maps, so the two devices are not drop-in pin-compatible and cannot be substituted without verifying the pinout against the respective TI datasheets.
Do both devices use the same CPU core and clock speed?
Yes. Both the AM1808EZWTA3 and AM1806BZCEA3 are built around the ARM926EJ-S RISC core and are rated for a 375 MHz maximum operating frequency, as indicated by the "A3" speed grade suffix in both part numbers. The core architecture and maximum clock rate are therefore equivalent between the two parts.
What is the difference in on-chip peripherals between the two parts?
The AM1808EZWTA3 integrates an LCD controller and a SATA controller in addition to the shared peripheral set, while the AM1806BZCEA3 does not include the LCD controller or SATA interface. Both share common Sitara AM18x peripherals such as the EMAC, USB, UART, SPI, I2C, and McASP, but designs requiring display output or SATA storage must use the AM1808 variant.
What does the "A3" suffix indicate on both part numbers?
The "A3" suffix in both AM1808EZWTA3 and AM1806BZCEA3 denotes the 375 MHz speed grade of the device. This suffix is common to the Sitara AM18x family and identifies the maximum operating frequency bin, so both parts share the same 375 MHz rating.
Can the AM1806BZCEA3 be used as a replacement for the AM1808EZWTA3?
Only if the design does not require the LCD controller or SATA interface and the PCB layout is redesigned for the ZCE ball map. Because the AM1806BZCEA3 lacks these peripherals and uses a different package designator, it is not a direct substitute; the schematic, pinout, and firmware must be validated against the AM1806 datasheet before substitution.
Are both devices available in the same operating temperature range?
Both the AM1808EZWTA3 and AM1806BZCEA3 are specified for the industrial temperature range of -40°C to +105°C (the "T" and "C" temperature designators in the respective part numbers correspond to this industrial grade). Designers should confirm the exact temperature grade against the current TI datasheet for each orderable part number.