LF 125 kHzNXP

HITAG S

Name: NXP HITAG S
Brand: NXP

The NXP HITAG S is an LF 125 kHz RFID tag IC, with 256 bit (HITAG S256) or 2048 bit (HITAG S2048) total memory, organized in 64 pages of 32 bits each, up to 100000 erase/write cycles, 10 years data retention, operating at 100 kHz to 150 kHz, under HITAG proprietary protocol (based on HITAG 1), ISO 11784/85 Animal ID compliant ISO 14223/ISO 18000-2 targeted.

Secure LF, automotive and industrial

Official Datasheet ↗

Frequency

100 kHz to 150 kHz

Protocol

HITAG proprietary protocol (based on HITAG 1), ISO 11784/85 Animal ID compliant, ISO 14223/ISO 18000-2 targeted

Memory

256 bit (HITAG S256) or 2048 bit (HITAG S2048) total memory, organized in 64 pages of 32 bits each, up to 100000 erase/write cycles, 10 years data retention

Interface

RF (contactless), integrated resonance capacitor 210 pF ±5%

Temp Range

-25°C to +85°C (junction temperature)

Form Factor

Sawn gold-bumped 8" wafer, sawn gold-megabumped 8" wafer, MOA4 (PLLMC contactless chip card module SOT500-2), HVSON2 (3×2×0.85 mm SOT899-1)

Full Specifications

Manufacturer	NXP
Frequency Category	LF 125 kHz
Frequency	100 kHz to 150 kHz
Protocol	HITAG proprietary protocol (based on HITAG 1), ISO 11784/85 Animal ID compliant, ISO 14223/ISO 18000-2 targeted
Memory	256 bit (HITAG S256) or 2048 bit (HITAG S2048) total memory, organized in 64 pages of 32 bits each, up to 100000 erase/write cycles, 10 years data retention
Interface	RF (contactless), integrated resonance capacitor 210 pF ±5%
Temperature Range	-25°C to +85°C (junction temperature)
Form Factor	Sawn gold-bumped 8" wafer, sawn gold-megabumped 8" wafer, MOA4 (PLLMC contactless chip card module SOT500-2), HVSON2 (3×2×0.85 mm SOT899-1)
Security	32-bit Unique Identification Number (UID), 48-bit secret key based encrypted authentication, secure memory lock functionality, plain mode and authentication mode operation

Engineering Brief

HITAG S is a 125 kHz LF contactless transponder IC offering two memory options (256-bit or 2048-bit) with backward compatibility to existing HITAG 1/2 reader infrastructure. The chip features fast anticollision protocol (100 tags in 3.2 seconds), integrated 210 pF resonance capacitor, and selectable plain or 48-bit encrypted authentication modes. Data rates support 5.2 kbit/s reader-to-tag and selectable 2/4/8 kbit/s tag-to-reader communication with Manchester and bi-phase coding, plus optional Transponder-Talks-First mode for rapid identification applications.

Typical Applications

Standards & Compliance

Frequently Asked Questions

What memory sizes are available for the NXP HITAG S?

The HITAG S is available in two memory configurations: HITAG S256 with 256 bits and HITAG S2048 with 2048 bits of total memory. Both versions organize memory in 64 pages of 32 bits each.

Is HITAG S compatible with existing HITAG readers?

Yes, HITAG S maintains backward compatibility with existing HITAG 1 and HITAG 2 reader infrastructure while using the HITAG proprietary protocol. It operates at 125 kHz LF frequency range (100-150 kHz).

What security features does the HITAG S offer?

HITAG S provides a 32-bit Unique Identification Number (UID), 48-bit secret key based encrypted authentication, and secure memory lock functionality. It supports both plain mode and authentication mode operation for flexible security requirements.

How fast is the HITAG S anticollision performance?

The HITAG S features fast anticollision protocol capable of reading 100 tags in 3.2 seconds. Data rates are 5.2 kbit/s from reader-to-tag and selectable 2/4/8 kbit/s from tag-to-reader.

What ISO standards does HITAG S comply with?

HITAG S is compliant with ISO 11784/85 for animal identification and targets ISO 14223 and ISO 18000-2 standards for RFID animal tracking and item management.

What is the data retention and write endurance of HITAG S?

HITAG S memory supports up to 100,000 erase/write cycles and offers 10 years of data retention, making it suitable for long-term automotive and industrial applications.

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