Part A
AM1808EZWTD4
Texas Instruments
- Lifecycle
- Active
- Stock
- 4891 PCS
- Package
- NFBGA-361
- Series
- Microprocesseur intégré
Replacement verdict
Compatible functional replacement candidate
The AM1806BZWT3 is a viable functional replacement candidate for the AM1808EZWTD4 in applications where the reduced on-chip memory and absence of an external memory interface are acceptable. Both devices share the same ARM926EJ-S core, 375 MHz clock rate, and NFBGA-361 package, but the AM1808EZWTD4 offers additional integrated features that the AM1806BZWT3 does not provide. Designers should validate memory requirements and peripheral interfaces before substituting.
Core Architecture
High match
Package Type
High match
On-Chip Memory
Validation required
External Memory Interface
Not compatible
Parts at a glance
Part B
AM1806BZWT3
Texas Instruments
- Lifecycle
- Active
- Stock
- 6789 PCS
- Package
- LFBGA-361
- Series
- Microprocesseur intégré
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AM1808EZWTD4 | AM1806BZWT3 | 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 | The higher clock on the AM1808EZWTD4 provides more processing headroom; a drop to 375 MHz may affect timing-critical applications. |
| On-Chip RAM | 128 KB | 128 KB | Identical on-chip RAM means internal buffering and stack capacity are unchanged. |
| Package / Case | 361-LFBGA (16x16) | 361-LFBGA (16x16) | Same package and footprint allow drop-in PCB compatibility without layout changes. |
| Operating Temperature Range | -40°C to 90°C (TJ) | -40°C to 90°C (TJ) | Matching temperature grades ensure equivalent environmental robustness for industrial applications. |
| Ethernet MAC | 10/100 Mbps MAC (with MDIO) | 10/100 Mbps MAC (with MDIO) | Both integrate an Ethernet MAC, so networked designs remain functionally equivalent. |
| USB Ports | 2 (1x USB 2.0 OTG + 1x USB 1.1 Host) | 2 (1x USB 2.0 OTG + 1x USB 1.1 Host) | Identical USB configuration supports the same peripheral connectivity options. |
| LCD Controller | Integrated LCD Controller | Integrated LCD Controller | Both include an LCD controller, preserving display interface capability for HMI designs. |
| Supply Voltage (Core) | 1.2 V (Core), 1.8/3.3 V (I/O) | 1.2 V (Core), 1.8/3.3 V (I/O) | Same voltage rails mean the existing power supply design can be reused unchanged. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AM1808EZWTD4 | 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 | 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) | 0°C ~ 90°C (TJ) |
| Ethernet | 10/100Mbps (1) | - |
| SATA | SATA 3Gbps (1) | - |
Frequently asked questions
What are the key differences between the AM1808EZWTD4 and AM1806BZWT3?
The AM1808EZWTD4 is an ARM926EJ-S based Sitara processor running at 456 MHz in a 361-ball NFBGA (ZWT) package, while the AM1806BZWT3 is a similar Sitara ARM926EJ-S device running at 375 MHz in the same 361-ball NFBGA (ZWT) package. The primary differences are operating frequency and the specific feature set/ordering variant defined in the respective datasheets.
Are the AM1808EZWTD4 and AM1806BZWT3 pin-compatible?
Both devices are offered in the same 361-ball NFBGA (ZWT) package, but pin compatibility must be confirmed against the official Texas Instruments datasheets and pin multiplexing tables for each specific device, since peripheral assignments and available functions can differ between the AM1808 and AM1806 families.
What is the maximum operating frequency of each device?
The AM1808EZWTD4 is specified at 456 MHz, and the AM1806BZWT3 is specified at 375 MHz, per the respective Texas Instruments Sitara AM1808 and AM1806 datasheets.
Do both devices use the same ARM core architecture?
Yes. Both the AM1808EZWTD4 and AM1806BZWT3 are based on the ARM926EJ-S RISC core with ARMv5TEJ instruction set support, as documented in the Texas Instruments Sitara AM1808/AM1806 datasheets.
Can the AM1806BZWT3 be used as a drop-in replacement for the AM1808EZWTD4?
Not as a guaranteed drop-in replacement. Although both are in the 361-ball ZWT package, the AM1808 and AM1806 differ in operating frequency and peripheral feature set, so a substitution requires validating pin multiplexing, clocking, and peripheral availability against the official TI datasheets for the target design.
What package type do these devices use?
Both the AM1808EZWTD4 and AM1806BZWT3 are supplied in a 361-ball NFBGA (ZWT) package, as specified in the Texas Instruments ordering information for the Sitara AM1808 and AM1806 product families.
Where can verified technical parameters for these devices be obtained?
Verified parameters should be taken from the official Texas Instruments datasheets and product pages for the AM1808 and AM1806, or from authorized distributors such as DigiKey, Mouser, or TTI, which publish manufacturer-sourced ordering and specification data.