Part A
AM1802EZWTD3
Texas Instruments
- Lifecycle
- Active
- Stock
- 3390 PCS
- Package
- NFBGA-361
- Series
- Embedidos - Microprocessadores
Replacement verdict
Compatible functional replacement candidate
The AM1806BZWT4 is a viable functional replacement candidate for the AM1802EZWTD3, sharing the same ARM926EJ-S core architecture and comparable peripheral integration, though the higher maximum operating frequency, different package footprint, and reduced on-chip memory require careful validation before substitution in existing designs.
Core Architecture
Validation required
Maximum Operating Frequency
Validation required
Package Type
Not compatible
On-Chip Memory
Validation required
Parts at a glance
Part B
AM1806BZWT4
Texas Instruments
- Lifecycle
- Active
- Stock
- 7006 PCS
- Package
- LFBGA-361
- Series
- Embedidos - Microprocessadores
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 | AM1806BZWT4 | Why it matters |
|---|---|---|---|
| Core Processor | ARM926EJ-S | ARM926EJ-S | Both use the same ARM9 core, so instruction set and toolchain compatibility are preserved. |
| Maximum Clock Frequency | 300 MHz | 456 MHz | Higher clock speed in the AM1806 provides more processing headroom for compute-intensive tasks. |
| On-Chip RAM | 8 KB | 128 KB | Larger internal RAM reduces external memory dependency and improves deterministic performance. |
| Package / Case | 361-LFBGA (16x16) | 361-NFBGA (16x16) | Different package ball-out and thermal characteristics affect PCB layout and assembly. |
| Operating Temperature Range | -40°C to 90°C | -40°C to 105°C | Wider temperature range in the AM1806 suits harsher industrial environments. |
| Ethernet MAC | 10/100 Mbps | 10/100 Mbps | Both integrate an EMAC, enabling networked embedded designs without external controllers. |
| USB Ports | 1x USB 2.0 OTG | 1x USB 2.0 OTG + 1x USB 1.1 Host | Additional USB host on the AM1806 allows direct connection of peripherals like storage or HID devices. |
| LCD Controller | Not included | Integrated LCD controller | The AM1806 can drive displays directly, eliminating an external display controller in HMI designs. |
| UART Interfaces | 3 | 3 | Same number of serial ports supports equivalent connectivity for legacy and peripheral devices. |
| 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 | Identical supply rails allow reuse of the same power design and sequencing circuitry. |
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 | AM1806BZWT4 |
|---|---|---|
| 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 | 456MHz |
| 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 AM1806BZWT4?
The AM1802EZWTD3 is an ARM926EJ-S based Sitara processor in a 361-ball NFBGA (ZWT) package, while the AM1806BZWT4 is an ARM926EJ-S based Sitara processor in a 361-ball NFBGA (ZWT) package with a different feature set and speed grade. The AM1806BZWT4 includes an LCD controller and additional peripherals not present on the AM1802, and the "4" suffix indicates a 456 MHz speed grade versus the AM1802EZWTD3's 375 MHz. Pin compatibility should be verified against the respective datasheets before substitution.
Are the AM1802EZWTD3 and AM1806BZWT4 pin-to-pin compatible?
Both devices are offered in the same 361-ball NFBGA (ZWT) package, but pin-to-pin compatibility is not guaranteed because the AM1806BZWT4 exposes additional peripheral functions (such as the LCD controller) on pins that may be assigned differently on the AM1802EZWTD3. A direct drop-in replacement should only be attempted after comparing the pin multiplexing tables in both official datasheets.
What is the maximum operating frequency of each device?
The AM1802EZWTD3 is rated for a 375 MHz ARM926EJ-S core clock, while the AM1806BZWT4 is rated for a 456 MHz ARM926EJ-S core clock, as indicated by the speed-grade suffix in each part number. Designs migrating between the two must confirm that external memory and peripheral timing margins support the higher clock rate of the AM1806BZWT4.
Does the AM1806BZWT4 include an LCD controller that the AM1802EZWTD3 lacks?
Yes. The AM1806BZWT4 integrates a liquid crystal display (LCD) controller for direct interfacing to passive or active display panels, whereas the AM1802EZWTD3 does not include an LCD controller. This is a primary functional differentiator between the two Sitara devices and affects pin usage and board-level design.
Can the AM1802EZWTD3 be replaced by the AM1806BZWT4 in an existing design?
Replacement is possible only after validating package pinout, power sequencing, clock tree, and peripheral multiplexing against the official Texas Instruments datasheets for both devices. Because the AM1806BZWT4 adds an LCD controller and runs at a higher core frequency, firmware, boot configuration, and PCB routing may require changes; a direct substitution without design review is not recommended.
What memory interfaces do these processors support?
Both the AM1802EZWTD3 and AM1806BZWT4 provide a 16/32-bit DDR2/mDDR SDRAM controller, an asynchronous EMIF (EMIFA) for NOR/NAND flash and SRAM, and a dedicated NAND flash interface, consistent with the AM180x Sitara family architecture. Exact supported memory speeds and bus widths should be confirmed in the respective device datasheets.
Are both devices available in the same package and temperature grade?
Both the AM1802EZWTD3 and AM1806BZWT4 are supplied in the 361-ball NFBGA (ZWT) package. The "D3" and "4" suffixes in the part numbers denote speed grade rather than temperature range; the extended temperature designation is indicated separately in the ordering information of each datasheet, so the exact operating temperature range must be verified from the manufacturer's ordering tables.