ATA5577M3 vs HITAG µ

ATA5577M3 offers multi-protocol emulation (EM4100, T5557, Indala) with 330-bit user memory. HITAG µ provides ISO 11784/11785 compliance and variants up to 1760 bits.

Side-by-side specs

Frequency

ATA5577M3: 125 kHz
HITAG µ: 100-150 kHz (LF)

Protocol

ATA5577M3: EM4100, EM4102, T5557, Hitag, Indala, and other LF formats
HITAG µ: ISO 11784, ISO 11785 (Animal ID); designed for ISO/IEC 14223; Reader Talks First (RTF) with anti-collision, Transponder Talks First (TTF)

Memory

ATA5577M3: 363 bits total (330 bits user programmable)
HITAG µ: HITAG µ: 128 bits total (4 blocks); HITAG µ Advanced: 512 bits (16 blocks); HITAG µ Advanced+: 1760 bits (55 blocks). Up to 10,000 erase/write cycles, 10 years data retention

Interface

ATA5577M3: RF (contactless)
HITAG µ: RF contactless (inductive coupling); integrated resonance capacitor 210 pF ±3% or 280 pF ±5%

Temp Range

ATA5577M3: -40°C to +85°C
HITAG µ: -40°C to +85°C (junction), -55°C to +125°C (storage)

Form Factor

ATA5577M3: Wafer, SO8, TSSOP8
HITAG µ: Sawn gold-bumped 8" wafer (550×550 µm die), HVSON2 (SOT899-1, 3×2×0.85 mm), SOT-1122 (XSON3, 1×1.45×0.5 mm)

Security

ATA5577M3: 32-bit password protection for read/write operations
HITAG µ: 48-bit Unique Identification Number (UID); 32-bit password with memory lock functionality and password-protected read/write regions

Spec	ATA5577M3	HITAG µ
Frequency	125 kHz	100-150 kHz (LF)
Protocol	EM4100, EM4102, T5557, Hitag, Indala, and other LF formats	ISO 11784, ISO 11785 (Animal ID); designed for ISO/IEC 14223; Reader Talks First (RTF) with anti-collision, Transponder Talks First (TTF)
Memory	363 bits total (330 bits user programmable)	HITAG µ: 128 bits total (4 blocks); HITAG µ Advanced: 512 bits (16 blocks); HITAG µ Advanced+: 1760 bits (55 blocks). Up to 10,000 erase/write cycles, 10 years data retention
Interface	RF (contactless)	RF contactless (inductive coupling); integrated resonance capacitor 210 pF ±3% or 280 pF ±5%
Temp Range	-40°C to +85°C	-40°C to +85°C (junction), -55°C to +125°C (storage)
Form Factor	Wafer, SO8, TSSOP8	Sawn gold-bumped 8" wafer (550×550 µm die), HVSON2 (SOT899-1, 3×2×0.85 mm), SOT-1122 (XSON3, 1×1.45×0.5 mm)
Security	32-bit password protection for read/write operations	48-bit Unique Identification Number (UID); 32-bit password with memory lock functionality and password-protected read/write regions

Verdict

Choose the ATA5577M3 if you need universal compatibility across legacy LF RFID systems. This chip emulates multiple protocols including EM4100, EM4102, T5557, Hitag, and Indala formats, making it ideal for access control retrofits or multi-vendor environments where readers expect different data structures. With 363 bits total memory (330 bits user-programmable), it provides sufficient storage for basic credential data and supports 32-bit password protection for read/write operations. The ATA5577M3 operates at standard 125 kHz and functions as a flexible, programmable tag that can adapt to existing infrastructure without reader replacement. It suits applications like building access control, parking systems, or industrial asset tracking where interoperability with diverse reader populations is critical. Choose the HITAG µ family if you require ISO-compliant animal identification, higher memory capacity, or advanced anti-collision capabilities. The HITAG µ operates across 100-150 kHz with three memory variants: 128 bits (4 blocks), 512 bits (16 blocks), or 1760 bits (55 blocks) in the Advanced+ version, significantly exceeding the ATA5577M3's capacity. It supports ISO 11784/11785 and ISO/IEC 14223 standards essential for livestock tracking and veterinary applications, with both Reader Talks First (RTF) anti-collision and Transponder Talks First (TTF) modes. The integrated resonance capacitor (210 pF ±3% or 280 pF ±5%) simplifies antenna design and reduces external components. With 10,000 erase/write cycles, 10-year data retention, and a 48-bit UID alongside 32-bit password protection with granular memory locking, the HITAG µ offers superior durability and security for applications like animal management, supply chain logistics requiring extended read ranges, or harsh environments needing reliable long-term data storage.

FAQ

Can ATA5577M3 emulate HITAG protocol tags?

Yes, the ATA5577M3 supports Hitag emulation among its multi-protocol capabilities, but it cannot replicate the full ISO 11784/11785 compliance or anti-collision features native to the HITAG µ family.

Which chip has more user memory capacity?

The HITAG µ Advanced+ offers 1760 bits total memory across 55 blocks, substantially more than the ATA5577M3's 330 bits of user-programmable memory. The base HITAG µ (128 bits) and Advanced (512 bits) variants also offer different capacity options.

What is the advantage of HITAG µ integrated resonance capacitor?

The integrated 210 pF or 280 pF resonance capacitor in HITAG µ eliminates the need for external tuning components, reducing bill-of-materials cost and simplifying antenna design compared to the ATA5577M3 which requires external capacitors.

Sourcing ATA5577M3 or HITAG µ in volume?

Roxtron builds custom RFID and NFC products around both ATA5577M3 and HITAG µ. Tell us your project — quantities, form factor, timeline — and we'll come back within 24 hours with pricing and lead times.