NXP Semiconductors TDA8020HL/C2,151

Overview

TDA8020HL/C2,151 from NXP Semiconductors (formerly Philips) is a dual smart card interface IC designed for ISO 7816-3 and EMV2000-compliant applications. It integrates two independent 6-contact card interfaces with programmable 3 V/5 V VCC outputs (up to 60 mA per card), an I²C-bus control interface (400 kHz), integrated DC-to-DC converter (doubler/tripler/follower), and automatic activation/deactivation sequencers - enabling secure, standards-conforming card handling in banking terminals and set-top boxes.

For engineers reviewing the TDA8020HL/C2,151 datasheet, TDA8020HL/C2,151 pinout, TDA8020HL/C2,151 application, or TDA8020HL/C2,151 equivalent, this device delivers dual-card support with hardware-enforced power sequencing, ESD-hardened card contacts (6 kV), voltage supervisor–driven emergency deactivation, and I²C address configurability via SAD0/SAD1 pins - critical for embedded financial and identity systems requiring high reliability and regulatory compliance.

Technical Context

The TDA8020HL/C2,151 implements two independent ISO 7816-3 sequencers clocked by a 2.5 MHz internal oscillator (2–3.2 MHz typ.), each managing cold/warm reset, clock enable timing, and ATR window detection (42100 CLK cycles for C2 variant). Its multimode DC-to-DC converter dynamically selects doubler (VDD < 3.4 V, 5 V card), tripler (VDD < 3.4 V, 3 V card), or follower (VDD > 3.5 V) operation based on VDD and target VCC, delivering regulated VUP (4.0–5.5 V) to dual VCC buffers.

Control and status are handled exclusively via a 400 kHz I²C-bus slave interface with four configurable addresses (SAD0/SAD1), supporting START/STOP, WARM, 3V/5V, PDOWN, CLKSEL, and I/OEN bit-level register writes. Status reads return real-time flags including PRES, MUTE, EARLY, PROT, and SUPL - all asserted as active-low IRQ pulses requiring acknowledgment before clearing.

Key Specifications

Pinout & Package

LQFP32 package (SOT358-1): plastic low-profile quad flat package, 32 leads, body size 7 × 7 × 1.4 mm, exposed pad not specified, RoHS-compliant lead finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST8020B and SLB9670, the TDA8020HL/C2,151 uniquely provides true dual independent ISO 7816-3 interfaces with hardware sequencers, auto-selecting DC-to-DC conversion, and I²C configurability - making it irreplaceable in multi-slot, standards-certified financial or identity terminals where concurrent card operation and regulatory compliance are mandatory.

Availability

TDA8020HL/C2,151 is available at Aetrix Electronics and suitable for banking terminals, set-top boxes, and internet kiosks requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing for ISO/EMV-certified designs.

Supply support for TDA8020HL/C2,151 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 identification markets, with deep heritage in smart card and secure element technology.

The TDA8020HL series was developed specifically for dual-interface, EMV2000-compliant smart card readers - targeting high-reliability financial, government, and pay-TV applications where hardware-enforced timing, power safety, and standards conformance are non-negotiable.

FAQ

What is the operating temperature range for the TDA8020HL/C2,151?

The TDA8020HL/C2,151 is rated for −40 °C to +85 °C ambient operation, matching the TDA8020HL/C2 variant specification. This extended range supports deployment in uncontrolled environments such as outdoor kiosks, industrial terminals, and automotive infotainment systems where thermal stability is critical. The device incorporates internal thermal shutdown protection that triggers automatic emergency deactivation if junction temperature exceeds safe limits.

How does the TDA8020HL/C2,151 handle dual-card power sequencing?

The TDA8020HL/C2,151 uses two independent hardware sequencers to manage activation and deactivation for each card separately. Each sequencer controls VCC ramp-up (0.09–0.14 V/µs), clock enable timing, RST assertion, and I/O enable - all synchronized to the internal 2.5 MHz oscillator. Sequencing is fully autonomous and complies with ISO 7816-3 timing requirements, including ATR window detection (42100 clock cycles for C2 variant) and warm/cold reset toggling.

Does the TDA8020HL/C2,151 support both 3 V and 5 V smart cards simultaneously?

Yes, the TDA8020HL/C2,151 supports independent 3 V and 5 V operation per card: VCC1 can be set to 3 V while VCC2 is set to 5 V, or both can operate at the same voltage. The DC-to-DC converter automatically configures as doubler, tripler, or follower based on VDD and the selected VCC targets. Each VCC output is current-limited to 90 mA and features dedicated decoupling requirements (2 × 100 nF, ESR < 100 mΩ).

What protections does the TDA8020HL/C2,151 provide against electrical faults?

The TDA8020HL/C2,151 includes comprehensive hardware protections: ±6 kV HBM ESD on all card contacts; current limiting on CLK (±70 mA), RST (±20 mA), I/O (±15 mA), and VCC (90 mA); automatic emergency deactivation on supply dropout, overload, overheating, or card removal; and integrated voltage supervisor with power-on reset and drop-out detection. All fault conditions assert the open-drain IRQ pin and set corresponding bits (PROT, SUPL, etc.) in the status register.

Can multiple TDA8020HL/C2,151 devices share the same I²C bus?

Yes, up to four TDA8020HL/C2,151 devices can operate in parallel on a single I²C bus using the SAD0 and SAD1 address selection pins. These pins configure two address bits, yielding four unique 7-bit slave addresses (40H, 42H, 44H, 46H for Card 1; 48H, 4AH, 4CH, 4EH for Card 2). Each device responds only to its assigned address, enabling scalable multi-slot reader architectures without bus contention.