NXP Semiconductors TDA8023TT/C1,118

Overview

TDA8023TT/C1,118 from NXP Semiconductors is a low-power, I²C-controlled smart card analog interface IC in TSSOP28 package, delivering ISO 7816-3/EMVCo 4.3-compliant VCC regulation (1.8 V/3 V/5 V ±8 %), programmable clock generation (up to 10 MHz), and integrated DC-to-DC converter with capacitive or inductive topology. It performs full supply, protection, and sequencing functions between microcontroller and contact smart cards in banking terminals.

For engineers reviewing the TDA8023TT/C1,118 datasheet, TDA8023TT/C1,118 pinout, TDA8023TT/C1,118 application, or TDA8023TT/C1,118 equivalent, key selection criteria include its dual-supply architecture (VDD up to 6.5 V, VDD(INTF) independent), shutdown current <10 µA, thermal/short-circuit protection on all card contacts, and hardware-accelerated activation/deactivation sequences compliant with EMVCo 4.3.

Technical Context

The TDA8023TT/C1,118 integrates an ISO 7816-3–compliant sequencer with automatic hardware-triggered deactivation on card removal, overtemperature, or VDD dropout. Its DC-to-DC converter auto-selects capacitive doubler/tripler/follower or inductive mode based on external component configuration and input/output voltage conditions.

It implements a 400 kHz I²C-bus slave interface with two configurable addresses (via SAD0), register-mapped control of CLK division (÷1, ÷2, ÷4, ÷5), RST pulse timing via 16-bit counter, and status monitoring (ACTIVE, PRESL, PROT, SUPL) with open-drain INT output. All card I/O lines feature ESD protection >6 kV and current limiting (I/O: ±15 mA, RST: ±20 mA, CLK: ±70 mA).

Key Specifications

Pinout & Package

Package: TSSOP28 (SOT361-1), plastic thin shrink small outline, 4.4 mm body width, 0.65 mm pitch - suitable for compact reader PCBs with automated assembly.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart card interface applications.

Compared with SLB9670TT and ST8023T, the TDA8023TT/C1,118 uniquely combines full EMVCo 4.3–compliant hardware sequencing, auto-sensing DC-to-DC topology, and 1.8 V/3 V/5 V card support in a single TSSOP28 package - making it the only solution that directly replaces legacy readers without firmware or layout changes.

Availability

TDA8023TT/C1,118 is available at Aetrix Electronics and suitable for banking terminals, internet kiosks, and portable card readers requiring stable component supply across long-life industrial deployments.

Supply support for TDA8023TT/C1,118 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in contactless and contact smart card interfaces.

The TDA8023TT/C1,118 belongs to NXP's secure transaction interface product line, engineered specifically for EMVCo- and ISO 7816–compliant smart card readers where hardware-level fault recovery, low-power operation, and multi-voltage card support are mandatory.

FAQ

What is the maximum clock frequency supported by the TDA8023TT/C1,118 for smart card communication?

The TDA8023TT/C1,118 generates a card clock (CLK) output up to 10 MHz, derived from a 20 MHz CLKIN input using programmable dividers (÷1, ÷2, ÷4, or ÷5). This meets ISO 7816-3 asynchronous timing requirements and supports high-speed synchronous protocols. The TDA8023TT/C1,118 also provides a 1 MHz low-power clock mode during inactive sessions to minimize card current draw.

Does the TDA8023TT/C1,118 support 1.8 V smart cards, and how is voltage accuracy ensured?

Yes, the TDA8023TT/C1,118 supports 1.8 V smart cards with VCC regulation accuracy of ±8 % (1.66 V to 1.94 V), fully compliant with EMVCo 4.3 and ISO 7816-3. Regulation is achieved via its integrated DC-to-DC converter, which auto-selects follower mode for 1.8 V output and includes built-in ripple filtering and controlled rise/fall times. The TDA8023TT/C1,118 maintains this accuracy across load currents up to 35 mA.

How does the TDA8023TT/C1,118 handle card insertion and removal events?

The TDA8023TT/C1,118 uses dedicated PRES (card presence) input with 10 ms hardware debouncing and triggers automatic activation/deactivation sequences per ISO 7816-3. On insertion, it executes a controlled VCC ramp, CLK enable, and RST assertion; on removal, it initiates emergency deactivation - dropping VCC with controlled slew rate and asserting INT to signal fault. The TDA8023TT/C1,118 performs these actions autonomously without MCU intervention.

What protection features does the TDA8023TT/C1,118 provide for smart card contacts?

The TDA8023TT/C1,118 provides comprehensive protection: thermal shutdown, short-circuit protection on all card contacts (C1–C8), ±6 kV HBM ESD on card-side pins, and current limiting on I/O (±15 mA), RST (±20 mA), CLK (±70 mA), and VCC (~90 mA). If any limit is exceeded, the TDA8023TT/C1,118 immediately executes an emergency deactivation sequence and asserts the INT pin.

Can the TDA8023TT/C1,118 operate with different DC-to-DC converter topologies, and how is selection performed?

Yes, the TDA8023TT/C1,118 supports both capacitive (doubler/tripler/follower) and inductive DC-to-DC configurations. Topology selection is fully automatic: the TDA8023TT/C1,118 detects external components (e.g., 100 nF caps vs. 6.8 µH inductor + diode) and configures its internal converter accordingly - no register writes or firmware logic required. This enables flexible, cost-optimized BOM choices across 1.8 V/3 V/5 V card types.