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Microchip Technology AT83C24-TISIL
- Part No.:
- AT83C24-TISIL
- Manufacturer:
- Microchip Technology
- Category:
- Specialized
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
AT83C24-TISIL.pdf
- Description:
- IC INTERFACE SPECIALIZED 28SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,224
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Product details
Overview
AT83C24-TISIL from Microchip Technology (formerly Atmel) is a smart card reader interface IC with integrated DC/DC converter, ISO 7816-compliant card power management, and TWI host control. It delivers programmable card supply voltages (1.8V/3V/5V), supports synchronous cards via C4/C8 contacts, provides 8 kV+ ESD protection on card I/O pins, and operates across 2.85–5.5 V input with <200 mV ripple - used in EFT/POS terminals and set-top boxes.
For engineers reviewing the AT83C24-TISIL datasheet, AT83C24-TISIL pinout, AT83C24-TISIL application, or AT83C24-TISIL equivalent, this page details its smart card interface architecture, TWI-configurable activation/deactivation sequencing, voltage supervisor functions (POR/PFD), low-power shutdown modes (down to 20 µA), and dual-package support (SO28/QFN28) for embedded secure transaction systems.
Technical Context
The AT83C24-TISIL implements a dedicated smart card interface controller with hardware- and software-driven activation sequences, automatic reset transition (ART) timing control, and independent CRST/CCLK generation sourced from CLK, DCCLK, A2/CK, or register bits. Its analog drivers include logic-level shifters between host (EVCC-referenced) and card (CVCC-referenced) domains, with programmable pull-ups and ESD-hardened I/O.
It integrates a high-efficiency (80–98%) step-up converter for CVCC generation, a 16-bit timer for ATR delay capture, and a two-wire interface (TWI) supporting up to 8 devices on one bus via A2/A1/A0 address configuration. The device supports both transparent mode (direct ISO 7816 signal pass-through) and full register-controlled operation with status polling and interrupt-driven card presence detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Card Supply Voltage | Programmable 1.8V ±0.14V / 3V ±0.2V / 5V ±5% - enables single-chip support for ISO 7816 Class A/B/C cards without external LDOs. |
| Input Voltage Range | 2.85 V to 5.5 V - allows direct connection to common system rails (3.3V or 5V) without pre-regulation. |
| Step-up Converter Efficiency | 80–98% - minimizes thermal load and extends battery life in portable readers. |
| Operating Current | ≤1 mA max active current; 20 µA typical in power-down (no card) - enables always-on card detection in low-power systems. |
| ESD Protection | 8 kV+ on CIO/CC4/CC8 pins (HBM) - meets MIL-STD-883 Class 3 for robust field deployment in public terminals. |
| Temperature Range | −40°C to +85°C - qualified for industrial and commercial EFT/POS environments. |
| TWI Address Range | 7-bit slave address 0x40–0x4F - supports up to 8 parallel devices on shared bus with A2/A1/A0 pin strapping. |
Pinout & Package
AT83C24-TISIL is available in SO28 (standard small-outline IC) and QFN28 (4×4 mm, 0.5 mm pitch) packages. Both variants share identical pin functions and electrical characteristics; pin numbering follows JEDEC MS-012 (SOIC) and JEDEC MO-220 (QFN) standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A2/CK- | TWI Address Input / Transparent Clock Source | Straps upper bit of 7-bit slave address at reset; in transparent mode, carries host clock to CCLK. |
| CRST | Smart Card Reset Output | Drives card RST contact; configurable via ART timer or direct CARDRST bit control per ISO 7816 timing. |
| CCLK | Smart Card Clock Output | Delivers programmable clock (4–48 MHz) to card; source selectable among CLK, DCCLK, A2/CK, or register bit. |
| CIO | Smart Card I/O Bidirectional Data | 8 kV+ ESD-hardened interface to card I/O contact; level-shifted to CVCC domain; supports ATR exchange. |
| CPRES | Card Presence Input | Detects mechanical insertion/extraction; polarity and filtering (4–256 samples) programmable via CONFIG1. |
| PRES/INT | Open-Drain Interrupt Output | Signals card insertion, ATR error, over-current, or CVCC fault; IT_SEL bit selects card-presence vs. event-interrupt mode. |
| RESET | Open-Drain System Reset I/O | Active-low reset input/output: asserts on POR/PFD, drives external devices, and reinitializes TWI interface. |
| LI | DC/DC Inductor Connection | Connects external 4.7 µH coil; supplies charge-pump current for step-up converter; may tie directly to VCC if unused. |
| CVCC | Programmable Card Supply Output | Regulated output for card power; requires external decoupling capacitor; monitored for out-of-range faults. |
| DVCC | Digital Core Supply | Internally generated 3V rail for digital logic; must be decoupled with 100 nF capacitor; not shared externally. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7816-3 Compliant Interface | Full support for T=0/T=1 protocols, ATR parsing, and EMV2000/GSM/WHQL-certified timing sequences. |
| Hardware-Accelerated Activation | Automatic CRST/CCLK sequencing triggered by CMDVCC edge, eliminating firmware overhead for standard card sessions. |
| Configurable Power Monitoring | POWERMON bit selects PFD supervision of either VCC or internal 3V regulator - ensures fail-safe deactivation during brownout. |
| Low-Power Shutdown Modes | Two-tier power-down: Mode 3 (90 µA) disables analog blocks only; Mode 4 (30 µA) adds pulsed 3V regulator for ultra-low standby. |
| Transparent Mode Operation | Direct pass-through of host RST/CLK/I/O/C4/C8 signals with level shifting - reduces BOM and simplifies migration from discrete interfaces. |
Applications
| EMV Payment Terminals | Secure ID Card Readers |
|---|---|
Use Scenario: Contact-based chip card transactions in unattended kiosks and point-of-sale systems requiring tamper-resistant power control and ATR validation. IC Role / Device Role / Timing Role: Smart card interface controller managing CVCC ramp, CRST assertion, CCLK delivery, and ATR timeout detection per ISO 7816-3 Annex A. Use Value: Integrated step-up converter eliminates external DC/DC IC; 8 kV ESD protection avoids external TVS diodes; TWI configurability enables dynamic voltage switching between 3V and 5V cards. |
Use Scenario: Government-issued e-passports and national ID cards deployed in border control and citizen service terminals. IC Role / Device Role / Timing Role: Secure card power sequencer enforcing EMV2000-defined activation timing (ta/tb/tc), card presence latching, and fault-triggered deactivation. Use Value: Automatic Reset Transition (ART) timer captures precise ATR delay for forensic logging; programmable CDS filtering rejects mechanical switch bounce in high-traffic readers. |
| Set-Top Box Conditional Access | Industrial Secure Firmware Updaters |
Use Scenario: Pay-TV smart card interfaces in consumer STBs where space, cost, and reliability are critical constraints. IC Role / Device Role / Timing Role: ICAM-compatible smart card bridge translating host TWI commands into ISO 7816 card signals with level-shifting and short-circuit protection. Use Value: EVCC-referenced level shifters enable direct connection to 1.6–5.5 V host MCUs; LI pin allows optional integration of external inductor for optimized efficiency. |
Use Scenario: Field-upgradable industrial controllers requiring secure boot authentication via contact smart cards before firmware execution. IC Role / Device Role / Timing Role: Trusted card interface enforcing power-fail safe deactivation (PFD) and POR-initiated register reset to prevent partial session corruption. Use Value: Power-on reset and power-fail detector (PFD) guarantee clean state recovery; SHUTDOWN bit enables deterministic low-power entry prior to MCU sleep. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart card interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SLB9670 | Trusted Platform Module (TPM) with integrated smart card controller; lacks programmable CVCC and step-up converter. | Designed for PC platform trust anchors, not standalone card readers; no TWI host interface. | Select SLB9670 only when TPM functionality (SHA-256, RSA key storage) is required alongside basic card access. |
| ST8024 | Single-supply 3.3V-only smart card interface; no DC/DC converter; supports only 3V/5V cards (no 1.8V). | Targeted at cost-sensitive 3.3V embedded systems; lacks card presence filtering and ART timer. | Choose ST8024 for fixed-voltage, non-battery-powered applications where CVCC flexibility and ultra-low standby are not needed. |
Compared with SLB9670 and ST8024, AT83C24-TISIL uniquely combines programmable multi-voltage card power, integrated step-up conversion, and TWI-configurable activation sequencing - making it the only option supporting 1.8V cards, battery-powered operation, and field-upgradeable voltage profiles in a single IC.
Availability
AT83C24-TISIL is available at Aetrix Electronics and suitable for EFT/POS terminals, secure ID readers, set-top box conditional access modules, and industrial firmware updaters requiring stable component supply, long-term lifecycle assurance, and compliance with ISO 7816 and EMV2000 standards.
Supply support for AT83C24-TISIL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT83C24 product line. The company specializes in secure microcontrollers, analog interface ICs, and embedded security solutions.
The AT83C24-TISIL belongs to Microchip's Smart Card Interface IC family, designed specifically to reduce bill-of-materials and firmware complexity in contact-based secure transaction systems while meeting global financial and identity card certification requirements.
FAQ
What is the primary function of the AT83C24-TISIL in a smart card system?
The AT83C24-TISIL serves as a complete smart card interface controller that manages card power (CVCC), clock (CCLK), reset (CRST), and data (CIO) signals while providing TWI-based host communication. It handles ISO 7816-compliant activation/deactivation sequences, voltage regulation, ESD protection, and fault monitoring - enabling direct connection between a host MCU and contact smart cards without discrete support components. AT83C24-TISIL replaces multiple discrete regulators, level shifters, and protection devices in EFT/POS and ID reader designs.
Does AT83C24-TISIL support 1.8V smart cards, and how is the voltage selected?
Yes, AT83C24-TISIL supports 1.8V smart cards via its programmable CVCC output. Voltage selection is controlled by the VCARD[1:0] bits in the CONFIG0 register: setting VCARD[1:0] = 01 configures 1.8V ±0.14V output. This setting initiates the internal step-up converter and enables the card interface. AT83C24-TISIL automatically adjusts drive strength and timing parameters to meet ISO 7816 Class C requirements for 1.8V operation - confirmed in the Electrical Characteristics section of the datasheet.
How does the AT83C24-TISIL handle card presence detection and debouncing?
AT83C24-TISIL uses the CPRES pin for card presence detection, with polarity configurable via the CARDDET bit in CONFIG1 and filtering depth set by CDS[2:0] (4 to 256 samples). An internal pull-up can be enabled/disabled using the PULLUP bit. Debouncing is implemented in hardware by sampling CPRES synchronously to the master clock (CLK), ensuring noise immunity without firmware intervention. AT83C24-TISIL generates an INSERT interrupt on valid transitions, and the PRES/INT pin reflects card status based on IT_SEL configuration - all verified in the "Card Presence Detection" section of the datasheet.
Can AT83C24-TISIL operate without an external inductor, and what is the impact?
Yes, AT83C24-TISIL can operate without an external inductor by connecting LI directly to VCC and disabling the step-up converter via the STEPREG bit in CONFIG4. In this mode, CVCC is supplied from an external source (e.g., a system LDO), and the internal DC/DC block is bypassed. The device retains full smart card interface functionality, including level shifting, ESD protection, and TWI control - but loses programmable voltage generation and efficiency benefits. AT83C24-TISIL datasheet Table 16 confirms minimum VCC requirements for this configuration.
What TWI address options are available for AT83C24-TISIL, and how are they configured?
AT83C24-TISIL supports eight unique 7-bit TWI slave addresses (0x40–0x4F), determined by the logic levels on A2/CK-, A1/RST-, and A0/3V pins at power-on reset. These pins are sampled once during reset to set the address; subsequent changes have no effect until next reset. Address mapping is defined in Table 2 of the datasheet, with write addresses ending in 0 and read addresses ending in 1 (e.g., A2=0/A1=0/A0=0 → write=0x40, read=0x41). AT83C24-TISIL also supports general-call reset (0x00 + 0x06) for synchronized initialization of multiple devices.
AT83C24-TISIL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- -
- Interface:
- 2-Wire
- Voltage - Supply:
- 3V ~ 5.5V
- Supplier Device Package:
- 28-SO
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
AT83C24-TISIL FAQ
1.How can I place an order for AT83C24-TISIL through Aetrix?
Please submit a Request for Quotation (RFQ) for AT83C24-TISIL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT83C24-TISIL reliable?
The price and inventory of AT83C24-TISIL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT83C24-TISIL is usually 5 days.
3.What payment methods are accepted for AT83C24-TISIL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT83C24-TISIL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT83C24-TISIL?
AT83C24-TISIL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT83C24-TISIL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT83C24-TISIL?
For technical support, including AT83C24-TISIL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT83C24-TISIL requirements.
6.How does Aetrix verify that AT83C24-TISIL is sourced from the original manufacturer or authorized distributors?
All AT83C24-TISIL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT83C24-TISIL meets industry standards.
7.What is the process for return or replacement of AT83C24-TISIL?
All AT83C24-TISIL units undergo pre-shipment inspection (PSI). If there is an issue with AT83C24-TISIL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT83C24-TISIL part is unused and in its original packaging.
Return procedure for AT83C24-TISIL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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