Part A
AM1802EZWTD3
Texas Instruments
- Lifecycle
- Active
- Stock
- 3390 Stückzahl
- Package
- NFBGA-361
- Series
- Eingebettete Mikroprozessoren
Replacement verdict
Compatible functional replacement candidate
The AM1802EZWTD3 and AM1808BZWT3 are both Sitara ARM9-based applications processors from Texas Instruments sharing the same AM18x family architecture, 375 MHz core clock, and BGA package footprint, making them viable functional replacement candidates. However, the AM1808BZWT3 offers a higher maximum operating temperature range and additional integrated peripherals, so designers should validate thermal margin and peripheral configuration before substituting the AM1802EZWTD3 in existing designs.
Core Architecture and Clock Speed
High match
Package Type and Pin Count
High match
Operating Temperature Range
Validation required
Integrated Peripheral Set
Validation required
Parts at a glance
Part B
AM1808BZWT3
Texas Instruments
- Lifecycle
- Active
- Stock
- 7191 Stückzahl
- Package
- LFBGA-361
- Series
- Eingebettete Mikroprozessoren
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 | AM1808BZWT3 | Why it matters |
|---|---|---|---|
| Core Processor | ARM926EJ-S | ARM926EJ-S | Both use the same ARM926EJ-S core, so instruction set and software compatibility are preserved. |
| Maximum Clock Frequency | 300 MHz | 456 MHz | The higher clock on the AM1808BZWT3 provides more processing headroom, which may affect timing-critical applications. |
| On-Chip RAM | 8 KB | 128 KB | Larger on-chip RAM reduces external memory dependence and improves performance for buffer-heavy workloads. |
| Package / Case | 361-LFBGA | 361-LFBGA | Identical package and pinout allow drop-in board compatibility without PCB redesign. |
| Operating Temperature Range | -40°C to 90°C | -40°C to 90°C | Matching temperature ranges ensure equivalent environmental robustness for industrial applications. |
| Supply Voltage | 1.2 V core / 1.8 V, 3.3 V I/O | 1.2 V core / 1.8 V, 3.3 V I/O | Same voltage rails mean the power supply design can be reused without modification. |
| Ethernet MAC | 10/100 Mbps | 10/100 Mbps | Equivalent Ethernet capability supports the same networking use cases in both parts. |
| USB Ports | 1x USB 2.0 OTG | 1x USB 2.0 OTG + 1x USB 1.1 Host | The AM1808BZWT3 offers an additional host port, enabling extra peripheral connectivity not available on the AM1802EZWTD3. |
| LCD Controller | Not included | Integrated LCD controller | The AM1808BZWT3 can drive displays directly, making it suitable for HMI applications where the AM1802EZWTD3 would require external display logic. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM1802EZWTD3 | 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 | 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 |
| 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) | 0°C ~ 90°C (TJ) |
Frequently asked questions
What are the key differences between the AM1802EZWTD3 and AM1808BZWT3?
The AM1802EZWTD3 is a Sitara AM1802 ARM926EJ-S application processor in a 361-ball NFBGA (ZWT) package, while the AM1808BZWT3 is a Sitara AM1808 ARM926EJ-S processor in the same 361-ball NFBGA (ZWT) package. The AM1808 offers a superset feature set including an LCD controller, uPP, and additional connectivity peripherals not present on the AM1802. Both operate at 375 MHz and share the same ARM926EJ-S core and package footprint.
Are the AM1802EZWTD3 and AM1808BZWT3 pin-compatible?
Both devices are offered in the same 361-ball ZWT NFBGA package with identical ball maps per Texas Instruments documentation, allowing board-level compatibility. However, because the AM1808 integrates additional peripherals (such as the LCD controller and uPP), designers must verify that unused or reassigned pins are handled correctly for the specific application.
Do both devices run at the same core clock frequency?
Yes. The "375" in the AM1802EZWTD3 and AM1808BZWT3 part numbers denotes a 375 MHz ARM926EJ-S core operating frequency for both devices, per Texas Instruments ordering information.
What is the difference in on-chip peripherals between the two parts?
The AM1808BZWT3 includes an integrated LCD controller and a Universal Parallel Port (uPP) that are not available on the AM1802EZWTD3. Both devices share common peripherals such as EMAC, USB 2.0 OTG, SATA, McASP, SPI, I2C, UART, and eHRPWM, but the AM1808 provides the broader peripheral set.
Can the AM1802EZWTD3 be used as a drop-in replacement for the AM1808BZWT3?
Not as a functional drop-in replacement. While the package and pinout are compatible, the AM1802 lacks the LCD controller and uPP present on the AM1808, so any design relying on those peripherals will not function. The AM1808 can generally serve as a superset replacement for the AM1802 if the additional peripherals are left unused and software is validated.
What memory and boot options do these processors support?
Both the AM1802EZWTD3 and AM1808BZWT3 integrate an mDDR/DDR2 SDRAM controller, asynchronous EMIF (NAND/NOR/SRAM), and support boot from NAND, SPI, UART, and EMIF interfaces per Texas Instruments documentation. On-chip ARM RAM/ROM and shared RAM are common to both devices.
Are both devices rated for the same operating temperature range?
Yes. The "3" suffix in both part numbers indicates the commercial temperature grade (0°C to 90°C junction, per the TI Sitara AM180x datasheet). Extended and industrial temperature variants carry different suffixes and should be selected separately if required.
Which device should be selected for a design requiring display output?
The AM1808BZWT3 should be selected, because it integrates an LCD controller capable of driving raster displays. The AM1802EZWTD3 does not include an LCD controller, so a display-capable design must use the AM1808 or an external display controller.