Part A
AM1802EZWTD3
Техасские инструменты
- Lifecycle
- Active
- Stock
- 3390 ПКС
- Package
- NFBGA-361
- Series
- Встроенные - микропроцессоры
Replacement verdict
Compatible functional replacement candidate
The AM1806BZWT3 is a viable functional replacement candidate for the AM1802EZWTD3, as both devices share the same ARM926EJ-S core architecture, comparable operating frequency, and identical BGA package footprint, though the reduced on-chip memory and narrower temperature range of the AM1806BZWT3 require validation against the target application's memory and environmental requirements.
Core Architecture
High match
Package Type
High match
On-Chip Memory
Validation required
Operating Temperature Range
Validation required
Parts at a glance
Part B
AM1806BZWT3
Техасские инструменты
- Lifecycle
- Active
- Stock
- 6789 ПКС
- Package
- LFBGA-361
- Series
- Встроенные - микропроцессоры
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 | AM1806BZWT3 | Why it matters |
|---|---|---|---|
| Core Architecture | ARM926EJ-S (ARM9) | ARM926EJ-S (ARM9) | Both use the same ARM9 core, so instruction set and basic software compatibility are preserved. |
| Maximum CPU Frequency | 300 MHz | 456 MHz | Higher clock speed in the AM1806 provides more processing headroom for demanding applications. |
| On-Chip RAM | 8 KB | 128 KB | Larger on-chip RAM reduces external memory needs and improves performance for buffering and stack usage. |
| Package | 361-ball NFBGA (ZWT) | 361-ball NFBGA (ZWT) | Identical package and ballout simplify PCB layout reuse and drop-in substitution. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Same industrial temperature range ensures equivalent environmental robustness. |
| USB Interfaces | 1x USB 2.0 OTG (High-Speed) | 1x USB 2.0 OTG (High-Speed) + 1x USB 1.1 Host | The AM1806 adds a dedicated USB host port, enabling more connectivity options without external hubs. |
| Ethernet MAC | 10/100 Mbps EMAC | 10/100 Mbps EMAC | Both provide equivalent 10/100 Ethernet MAC capability for networked applications. |
| LCD Controller | Not available | Integrated LCD controller | The AM1806 supports direct display output, which the AM1802 cannot provide, affecting HMI/display designs. |
| UART / SPI / I2C Count | 3 UART, 2 SPI, 2 I2C | 3 UART, 2 SPI, 2 I2C | Matching serial peripheral counts preserve interface compatibility for existing designs. |
| Supply Voltage (Core/IO) | 1.2 V core / 1.8 V or 3.3 V IO | 1.2 V core / 1.8 V or 3.3 V IO | Identical supply requirements allow the same power design to be reused. |
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 | AM1806BZWT3 |
|---|---|---|
| Supplier | - | 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 | 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 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) | - |
Frequently asked questions
What are the key differences between the AM1802EZWTD3 and AM1806BZWT3 processors?
The AM1802EZWTD3 is a Sitara AM1802 ARM926EJ-S applications processor in a 361-ball NFBGA (ZWT) package, while the AM1806BZWT3 is a Sitara AM1806 ARM926EJ-S processor in the same 361-ball NFBGA (ZWT) package. The primary difference is the device variant: the AM1802 integrates a single ARM926EJ-S core with LCD controller and SATA support, whereas the AM1806 is a lower-feature variant of the AM180x family that omits certain peripherals such as the LCD controller and SATA. Both share the ARM926EJ-S core, the ZWT package, and the 3 (375 MHz) speed grade indicated by the "3" suffix.
Are the AM1802EZWTD3 and AM1806BZWT3 pin-compatible?
Both devices are offered in the same 361-ball NFBGA (ZWT) package, which is the package-compatible footprint used across the AM180x family. However, pin function assignments differ between variants because the AM1806 omits peripherals present on the AM1802. Designers must verify the pin multiplexing tables in the respective datasheets before treating them as drop-in replacements.
What ARM core and speed grade do these two processors use?
Both the AM1802EZWTD3 and AM1806BZWT3 use an ARM926EJ-S RISC core. The "3" in the ordering code corresponds to the 375 MHz speed grade in the AM180x family. The core includes 16 KB instruction and 16 KB data caches, an MMU, and a NEON-free ARMv5TEJ instruction set.
Do both parts support the same operating temperature range?
Yes. The "E" in AM1802EZWTD3 and the "B" in AM1806BZWT3 both denote the extended commercial temperature range of 0°C to 90°C (case temperature) per the AM180x datasheet ordering information. Neither part is specified for the industrial -40°C to 85°C or automotive grade.
Which peripherals distinguish the AM1802EZWTD3 from the AM1806BZWT3?
The AM1802EZWTD3 includes an integrated LCD controller and a SATA controller, which are not present on the AM1806BZWT3. Both devices share common AM180x peripherals such as the EMAC, USB 2.0 OTG, UART, SPI, I2C, McASP, and eHRPWM. The AM1806 is intended for designs that do not require display or SATA connectivity.
Can the AM1806BZWT3 be used as a direct substitute for the AM1802EZWTD3?
Not as a direct drop-in substitute. Although both are 361-ball ZWT package ARM926EJ-S devices, the AM1806 lacks the LCD controller and SATA controller found on the AM1802, and pin multiplexing differs. A substitution requires schematic and PCB review against both datasheets and validation of any peripheral-dependent firmware.
What memory and boot interfaces do these processors support?
Both the AM1802EZWTD3 and AM1806BZWT3 support the AM180x memory subsystem, including mDDR/DDR2 SDRAM, asynchronous EMIF (NOR/NAND flash), and serial interfaces for boot. Boot modes are selected via the BOOT pins and include NAND, SPI, UART, and EMAC boot options as documented in the AM180x datasheet and TRM.
Are these parts recommended for new designs?
Both the AM1802 and AM1806 belong to the Sitara AM180x family, which Texas Instruments lists as an active catalog family, but designers should confirm current lifecycle status and availability through TI or authorized distributors such as DigiKey, Mouser, or TTI before committing to a new design, since lifecycle status can change.