ACR39T-A1 - Payment terminal ACS - Free user manual and instructions
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| Product Type | Smart Card Reader / Payment Terminal |
| Model | ACR39T-A1 |
| Brand | ACS (Advanced Card Systems) |
| Interface | USB 2.0 (Full Speed) |
| Card Compatibility | ISO 7816 Class A, B, C (5V, 3V, 1.8V) smart cards; ISO 14443 Type A & B contactless cards |
| Dimensions (L x W x H) | Approximately 78 mm x 48 mm x 12 mm |
| Weight | Approximately 30 g |
| Power Supply | USB bus-powered (5V DC, 500 mA) |
| Operating Temperature | 0°C to 50°C |
| Storage Temperature | -20°C to 70°C |
| Operating Humidity | Up to 90% non-condensing |
| Main Functions | Read and write contact and contactless smart cards; support for EMV Level 1 and payment applications; secure PIN entry |
| Supported Operating Systems | Windows (7/8/10/11), Linux, macOS, Android (via OTG) |
| LED Indicators | Power/Activity LED |
| Compliance | CE, FCC, RoHS, EMV Level 1 (contact and contactless) |
| Included Accessories | USB cable, quick start guide |
| Maintenance & Cleaning | Disconnect from USB; clean with a soft dry cloth; avoid liquids and abrasives |
| Safety Instructions | Use only with certified USB ports; keep away from extreme temperatures and moisture |
| Spare Parts & Repairability | No user-serviceable parts; contact authorized service center for repairs |
| General Information | Designed for secure payment transactions; supports contactless and contact card technologies |
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USER MANUAL ACR39T-A1 ACS
ACR39T-A1 [USB Type A] Smart Card Reader

Technical Specifications V1.06
Table of Contents
1.0. Introduction .... 3 1.1. Smart Card Reader 3 1.2. Ease of Integration....3 2.0. Features 4 3.0. Supported Card Types ....5 3.1. MCU Cards 5 3.2. Memory-based Smart Cards....5 4.0. Typical Applications....6 5.0. Technical Specifications....7 6.0. Opening the SIM card cover 9
1.0. Introduction
The ACR39T-A1 hails the new and modern technology in the world of smart card readers. It is a SIM-sized smart card reader that is small in size but packs a lot of features. Being a compact and powerful smart card reader, the ACR39T-A1 brings together sophisticated technology with modern design to meet rigorous requirements in various smart card-based applications.

1.1. Smart Card Reader
ACR39T-A1 supports ISO 7816 Class A, B, and C smart cards (5 V, 3 V, and 1.8 V) and works well with most memory cards and microprocessor cards with the T=0 and T=1 protocol. It also features a USB Full Speed interface and a smart card read/write speed of up to 600 Kbps. This makes it ideal for a broad range of solutions, such as Physical and Logical Access Control, Digital Signature, and Online Banking.
1.2. Ease of Integration
The ACR39T-A1 has PC/SC and CCID compliance, making it easy to install and use as it is specifically designed to be integrated into any computer-based environment. Its drivers are compatible with operating systems such as Windows®, Linux®, Mac OS®, and Solaris. In addition, ACR39T-A1 may now be used on mobile devices running the Android™ platform with versions 3.1 and later.
With its numerous features, the ACR39T-A1 is clearly the perfect smart card reader for your smart card solution.
2.0. Features
• USB Full Speed Interface - USB Type A Connector - Plug and Play – CCID support brings utmost mobility • Includes protective USB cap - Smart Card Reader:
- Contact Interface:
■ Supports ISO 7816 Class A, B, and C (5 V, 3 V, 1.8 V) and 1.6V SIM-sized cards ■ Supports microprocessor cards with T=0 and T=1 protocol ■ Supports memory cards ■ Supports PPS (Protocol and Parameters Selection) ■ Features Short Circuit Protection
• Application Programming Interface:
- Supports PC/SC; supports CT-API (through wrapper on top of PC/SC)
• Supports Android™ 3.1 and later • Compliant with the following standards:
- EN 60950/IEC 60950, ISO 7816, PC/SC, CCID, CE, FCC, WEEE
- RoHS 2, REACH, VCCI (Japan)
- Microsoft® WHQL
3.0. Supported Card Types
3.1. MCU Cards
ACR39T-A1 operates with MCU cards following either the T=0 or T=1 protocol.
3.2. Memory-based Smart Cards
ACR39T-A1 works with several memory-based smart cards such as:
- Cards following the I2C bus protocol (free memory cards) with maximum 128 bytes page with capability, including: Atmel®: AT24C01/02/04/08/16/32/64/128/256/512/1024
- SGS-Thomson: ST14C02C, ST14C04C
- Gemplus: GFM1K, GFM2K, GFM4K, GFM8K
- Cards with intelligent 1 KB EEPROM with write-protect function, including:
○ Infineon®: SLE4418, SLE4428, SLE5518 and SLE5528
- Cards with intelligent 256-byte EEPROM with write-protect function, including:
○ Infineon®: SLE4432, SLE4442, SLE5532 and SLE5542
4.0. Typical Applications
- e-Government • e-Banking and e-Payment • e-Healthcare • Public Key Infrastructure • Network Security
- Access Control
- Loyalty Program
5.0. Technical Specifications




Physical Characteristics
Dimensions 49.5 mm (L) × 21.5 mm (W) × 9.0 mm (H)
Weight 8.5 g
Color .... Black
USB Host Interface
Protocol ...... USB CCID
Connector Type.... Standard Type A
Power Source...... From USB port
Speed.... USB Full Speed (12 Mbps)
Supply Voltage 5 V
Contact Smart Card Interface
Number of Slot.... 1 SIM-sized Card Slot (optional with MicroSIM-sized)
Standard ..... ISO 7816 Parts 1-3, Class A, B, C (5 V, 3 V, 1.8 V)
Protocol....T=0; T=1; Memory Card Support
Supply Current Max. 50 mA
Smart Card Read/Write Speed..... 9.6 Kbps - 600 Kbps
Short Circuit Protection ..... (+5) V/GND on all pins
Clock Frequency 4.80 MHz
Card Connector .... Contact
Card Insertion Cycles ...... Min. 10,000
Built-in Peripheral
LED ...... Green
Application Programming Interface
PC-linked Mode..... PC/SC
CT-API (through wrapper on top of PC/SC)
Operating Conditions
Temperature.... 0 °C - 60 °C
Humidity ...... Max. 90% (non-condensing)
MTBF 500,000 hrs
Certifications/Compliance
EN 60950/IEC 60950, ISO 7816, USB Full Speed, PC/SC, CCID, CE, FCC, WEEE, RoHS 2, REACH VCCI (Japan), Microsoft® WHQL
Device Driver Operating System Support
Windows® XP, Windows Vista®, Windows® 7, Windows® 8, Windows® 8.1, Windows® 10
Windows® Server 2003, Windows® Server 2008, Windows® Server 2008 R2, Windows® Server 2012,
Windows® Server 2012 R2, Windows® Server 2016
Linux®, Mac OS®, Solaris, Android™ 3.1 and later













6.0. Opening the SIM card cover
- Open the SIM card cover from the back part of the reader.

- Pull out the back cover from the top end.

- Remove the cover completely to insert/remove the SIM card to/from the reader.

Android is a trademark of Google LLC.
Atmel is a registered trademark of Atmel Corporation or its subsidiaries, in the US and/or other countries.
Infineon is a registered trademark of Infineon Technologies AG.
Linux® is the registered trademark of Linus Torvalds in the U.S. and other countries.
Mac OS is a trademark of Apple Inc., registered in the U.S. and other countries.
Microsoft, Windows, and Windows Vista are registered trademarks of Microsoft Corporation in the United States and/or other countries.