Part A
AM1808BZWTD4
德州儀器
- Lifecycle
- Active
- Stock
- 1425 件
- Package
- LFBGA-361
- Series
- 嵌入式微處理器
Replacement verdict
Compatible functional replacement candidate
The AM1806BZCEA3 is a viable functional replacement candidate for the AM1808BZWTD4 only when the reduced feature set, lower maximum clock rate, and narrower temperature range are acceptable for the target design. Both devices share the same ARM926EJ-S core, BGA package footprint, and Sitara AM1x platform architecture, but the AM1808BZWTD4 offers higher performance, an extended temperature range, and additional integrated peripherals that the AM1806BZCEA3 does not provide. Designers must validate clock-dependent timing, peripheral availability, and thermal margin before committing to the substitution.
Core Architecture
Validation required
Maximum Clock Frequency
Validation required
Package Type
Validation required
Operating Temperature Range
Not compatible
Parts at a glance
Part B
AM1806BZCEA3
德州儀器
- Lifecycle
- Active
- Stock
- 160 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 | AM1808BZWTD4 | 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 | 375 MHz | A higher maximum clock allows more processing throughput; a slower part may not meet timing requirements of the original design. |
| Package / Case | 361-LFBGA (16x16) | 361-LFBGA (16x16) | Identical package and footprint allow drop-in board placement without PCB redesign. |
| Operating Temperature Range | -40°C to 90°C (TJ) | -40°C to 105°C (TJ) | The wider temperature range of the AM1806 suits harsher environments; substituting a narrower-range part may violate thermal margins. |
| On-Chip RAM | 8KB ARM RAM + 128KB shared RAM | 8KB ARM RAM + 128KB shared RAM | Matching internal memory sizes ensures firmware memory maps and buffer allocations remain valid. |
| Ethernet MAC | 10/100 Mbps EMAC with MDIO | Not available | The AM1808 includes an integrated Ethernet MAC while the AM1806 does not, so networked applications cannot be directly substituted. |
| USB Ports | 2 (USB 2.0 OTG + Host) | 2 (USB 2.0 OTG + Host) | Identical USB capability preserves connectivity options for peripherals and host functions. |
| LCD Controller | Integrated LCD controller | Not available | The AM1808 supports direct display interfacing; the AM1806 lacks this, so display-based designs cannot use it as a drop-in replacement. |
| Supply Voltage (Core) | 1.2 V (1.14–1.32 V) | 1.2 V (1.14–1.32 V) | Same core voltage means the existing power supply design remains compatible. |
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 | AM1808BZWTD4 | AM1806BZCEA3 |
|---|---|---|
| Supplier | - | Rochester Electronics, LLC,Texas Instruments |
| Series | Sitara™ | Sitara™ |
| Part Status | Obsolete | Obsolete |
| Core Processor | ARM926EJ-S | ARM926EJ-S |
| Number of Cores / Bus Width | 1 Core, 32-Bit | 1 Core, 32-Bit |
| Speed | 456MHz | 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 ~ 90°C (TJ) | -40°C ~ 105°C (TJ) |
| Ethernet | 10/100Mbps (1) | - |
| SATA | SATA 3Gbps (1) | - |
Frequently asked questions
What are the primary differences between the AM1808BZWTD4 and the AM1806BZCEA3?
The AM1808BZWTD4 is a Sitara ARM Microprocessor (MPU) based on the ARM926EJ-S core, supplied in a 361-ball NFBGA (ZWT) package and specified for the commercial temperature range of 0°C to 90°C. The AM1806BZCEA3 is a lower-featured variant of the same AM180x family, supplied in a 361-ball NFBGA (ZCE) package and specified for the extended temperature range of -40°C to 90°C. The AM1808 integrates additional peripherals such as a SATA controller and a uPP (universal parallel port), which are not available on the AM1806.
Are the AM1808BZWTD4 and AM1806BZCEA3 pin-to-pin compatible?
No. Although both devices are housed in a 361-ball NFBGA package, the AM1808BZWTD4 uses the ZWT package designator while the AM1806BZCEA3 uses the ZCE package designator. These are distinct ball maps with different signal assignments, so the two devices are not drop-in replacements and require separate PCB layouts.
Do both devices use the same CPU core and clock speed?
Yes. Both the AM1808BZWTD4 and the AM1806BZCEA3 are built on the ARM926EJ-S RISC core and are rated for a maximum operating frequency of 456 MHz, as documented in the Texas Instruments AM180x Sitara ARM Microprocessor datasheet (SPRS653).
What is the operating temperature range of each device?
The AM1808BZWTD4 is specified for the commercial temperature range of 0°C to 90°C (case temperature). The AM1806BZCEA3 is specified for the extended temperature range of -40°C to 90°C (case temperature). Designs requiring sub-zero operation should use the extended-temperature AM1806BZCEA3.
Which peripherals distinguish the AM1808BZWTD4 from the AM1806BZCEA3?
The AM1808BZWTD4 includes a SATA 3.0 Gbps controller and a universal parallel port (uPP), in addition to the shared AM180x peripheral set (EMAC, USB 2.0 OTG, LCD controller, McASP, SPI, I2C, UART, and eHRPWM). The AM1806BZCEA3 omits the SATA controller and uPP, so applications requiring SATA storage or high-speed parallel capture must use the AM1808BZWTD4.
Can the AM1806BZCEA3 be used as a substitute for the AM1808BZWTD4?
Only if the design does not require SATA or uPP functionality and the PCB is redesigned for the ZCE ball map. Because the two devices use different package ball maps and the AM1806 lacks the SATA and uPP peripherals, a direct substitution is not possible without schematic and layout changes validated against the respective Texas Instruments datasheets.
Are both devices RoHS compliant and lead-free?
Yes. Both the AM1808BZWTD4 and the AM1806BZCEA3 are offered by Texas Instruments in RoHS-compliant, lead-free (Pb-free) NFBGA packages, consistent with the ordering information in the AM180x datasheet (SPRS653). Designers should confirm the specific orderable part number's compliance status on the manufacturer or authorized distributor page before production release.