Analog Devices Inc./Maxim Integrated DS8113-RNG+TR

Overview

DS8113-RNG+ from Maxim Integrated is a smart card analog front-end IC designed to interface microcontrollers with ISO 7816-, EMV™-, and GSM11-11-compliant smart cards. It supports 1.8V, 3V, and 5V card operation, delivers up to 80mA at 5V with ±5% regulation, provides 8kV IEC ESD protection on card lines, and achieves ultra-low stop-mode current of <10nA. It is used in secure payment terminals and access control readers where low-power card activation and robust level shifting are required.

For engineers reviewing the DS8113-RNG+ datasheet, DS8113-RNG+ pinout, DS8113-RNG+ application, or DS8113-RNG+ equivalent, this page details its dual-supply architecture, programmable clock division (÷1/2/4/8), automatic activation/deactivation sequencing, integrated VCC generation, and fault detection for short-circuit, overtemperature, and card removal - all critical for EMV Level 1–certifiable designs.

Technical Context

The DS8113-RNG+ implements a dedicated hardware sequencer that autonomously manages smart card power-up (tACT ≤ 220μs) and deactivation (tDEACT ≤ 100μs), including controlled VCC ramping, CLK enable timing, and RST assertion. Its analog front-end includes three bidirectional level-shifting transceivers (I/O, AUX1, AUX2) with 11kΩ internal pullups, active pullup pulse (tPU = 100ns), and ±15mA current limiting.

It uses a dual-supply topology: VDD (2.7–6.0V) powers digital logic and host interfaces, while VDDA (≥5.0V) feeds the card voltage generator. Clock generation supports external crystal (up to 20MHz) or buffered clock input, with synchronous divider selection via CLKDIV1/CLKDIV2 pins - no glitching during frequency changes, and guaranteed 45–55% duty cycle on CLK output.

Key Specifications

Pinout & Package

DS8113-RNG+ is housed in a 28-pin SO (Small Outline) package, RoHS-compliant and lead-free, with operating temperature range of –40°C to +85°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX3232ESE+ and ST8024B, DS8113-RNG+ uniquely integrates triple-voltage regulation, autonomous EMV-compliant sequencing, and 8kV ESD in a single 28-pin SO package - reducing total solution size by >40% and eliminating firmware timing-critical activation routines.

Availability

DS8113-RNG+ is available at Aetrix Electronics and suitable for banking payment terminals, POS systems, ATM card readers, and secure access control panels requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for DS8113-RNG+ 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

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, communications, and security applications.

The DS8113-RNG+ belongs to Maxim's secure transaction interface product line, engineered specifically for ISO 7816/EMV/GSM11-11 smart card readers - emphasizing low-power operation, autonomous sequencing, and certified ESD robustness.

FAQ

What is the primary function of the DS8113-RNG+ in a smart card system?

The DS8113-RNG+ serves as a fully integrated analog front-end that bridges a host microcontroller to an ISO 7816 smart card. It generates regulated 1.8V/3V/5V card supply voltages, provides level-shifted and ESD-protected I/O, CLK, RST, and AUX lines, and executes autonomous activation/deactivation sequences - eliminating the need for discrete regulators, level shifters, and timing-critical firmware control in DS8113-RNG+ implementations.

How does the DS8113-RNG+ achieve ultra-low stop-mode current?

The DS8113-RNG+ enters stop mode when CMDVCC, 5V/3V, and 1_8V are all driven high while the card interface is inactive. In this state, all internal analog circuits-including the VCC generator, oscillator, and transceivers-are disabled, resulting in a typical current draw of less than 10nA. The OFF pin mirrors the PRES signal during stop mode, enabling wake-on-card-insert functionality without additional external circuitry in DS8113-RNG+ designs.

Can the DS8113-RNG+ support EMV Level 1 certification?

Yes, the DS8113-RNG+ is designed to meet EMV Level 1 requirements. It guarantees 45–55% CLK duty cycle, ≤8ns CLK rise/fall times (CL = 30pF), 100ns active pullup on I/O, and 8kV IEC 61000-4-2 ESD protection on card lines - all critical parameters verified in the DS8113-RNG+ datasheet. Maxim also provides an EMV Level 1 library for the MAXQ2000 microcontroller and reference hardware to accelerate certification.

What happens if both 1_8V and 5V/3V pins are set high simultaneously on the DS8113-RNG+?

If 1_8V and 5V/3V are both high while CMDVCC is also high, the DS8113-RNG+ enters stop mode - regardless of card presence. This is a defined functional state, not a fault. To avoid unintended entry, the DS8113-RNG+ datasheet specifies a minimum 100ns delay between changing 1_8V and 5V/3V states. During normal operation, 1_8V has priority: when asserted high, it forces 1.8V VCC output irrespective of 5V/3V state.

Does the DS8113-RNG+ require external components for basic operation?

Yes, the DS8113-RNG+ requires external passive components for stable operation: two decoupling capacitors (100nF + 220nF, ESR < 100mΩ) between VCC and CGND; a 20MHz crystal (or external clock source) across XTAL1/XTAL2; and proper separation of PGND, GND, and CGND planes. No external regulators, level shifters, or ESD protection devices are needed - all are integrated into the DS8113-RNG+ die.