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Analog Devices Inc./Maxim Integrated DS8313-RRX+
- Part No.:
- DS8313-RRX+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
DS8313-RRX+.pdf
- Description:
- IC INTERFACE SPECIALIZED 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,326
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Product details
Overview
The DS8313-RRX+ from Maxim Integrated is a smart card analog front-end IC designed to interface microcontrollers with ISO 7816-compliant 1.8V, 3V, and 5V smart cards-excluding AUX1/C4 and AUX2/C8 contacts. It delivers regulated VCC outputs (5V/80mA, 3V/65mA, 1.8V/30mA), supports flexible clock division (÷1, ÷2, ÷4, ÷8), and achieves ultra-low stop-mode current (<10nA). It is used in banking POS terminals, PIN pads, and telecom SIM/SAM readers.
For engineers reviewing the DS8313-RRX+ datasheet, DS8313-RRX+ pinout, DS8313-RRX+ application, or DS8313-RRX+ equivalent, this page provides verified functional specifications, confirmed pin roles, real-world use-value per application, and two validated alternative parts for smart card interface design.
Technical Context
The DS8313-RRX+ implements a dual-supply architecture: VDD (2.7–6.0V) powers digital logic and host interfaces, while VDDA (≥4.75V) supplies the internal card-voltage generator. Its internal sequencer autonomously manages activation/deactivation-including controlled VCC ramp-up/down, precise CLK timing, and RST synchronization-without host firmware intervention.
It integrates ESD protection (±8kV HBM on card I/O), short-circuit and overtemperature fault detection, and a programmable presence-detect debounce (8ms typ). Clock generation accepts either an external 20MHz crystal (XTAL1/XTAL2) or buffered clock input (XTAL1), with divider selection via CLKDIV1/CLKDIV2 pins per Table 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Digital Supply Voltage (VDD) | 2.7V to 6.0V - matches host MCU rail; enables direct level-shifting of I/OIN and control signals |
| Analog Supply (VDDA) | 4.75V to 6.0V - required minimum to guarantee 5V ±5% VCC output at up to 80mA |
| VCC Output Capability | 5V/80mA, 3V/65mA, 1.8V/30mA - sufficient for full ISO 7816 Class A/B/C cards without external regulators |
| Stop-Mode Current | <10nA - enables multi-year battery life in portable smart card readers and secure tokens |
| ESD Protection (Card I/O) | ±8kV HBM - meets IEC 61000-4-2 Level 4 for robust field deployment in public-access terminals |
| Activation Time (tACT) | 50–220μs - ensures fast card response after CMDVCC assertion, critical for low-latency ATR exchange |
| CLK Frequency Range | 0–10MHz - fully compliant with ISO 7816-3 fmax = 5MHz (with 2× oversampling) and EMV 2000 timing |
Pinout & Package
DS8313-RRX+ is housed in a 28-pin SO (Small Outline) package, RoHS-compliant and lead-free. Pin functions are validated per Maxim's official DS8313/DS8314 datasheet Rev 1 (May 2009), with no NC pins assigned to signal roles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | CLKDIV1, CLKDIV2 | Binary-select inputs for CLK output frequency division (÷1, ÷2, ÷4, ÷8) - must be changed sequentially with ≥10ns delay |
| 3 | 5V/3V | Logic-controlled VCC selection: high = 5V, low = 3V - overridden by 1_8V when active |
| 4 | 1_8V | Active-high enable for 1.8V VCC output - highest priority in voltage selection hierarchy |
| 6, 18 | VDDA | Analog supply input (pin 18 is NC on DS8314 only; functional on DS8313-RRX+) |
| 10 | PRES | Active-high card presence input - triggers 8ms hardware debounce before OFF assertion |
| 11 | I/O | Smart card data line (C7 contact) - bidirectional, internally level-shifted, 11kΩ pullup to VCC |
| 14 | CGND | Dedicated card ground reference - must be connected directly to smart card C1 contact |
| 15 | CLK | Smart card clock output (C3 contact) - 0–10MHz, 45–55% duty cycle, slew rate controlled per ISO 7816 |
| 16 | RST | Smart card reset output (C2 contact) - synchronized to activation sequence; driven low during deactivation |
| 17 | VCC | Regulated smart card supply output - decoupled with dual 100nF caps (ESR < 100mΩ) to CGND |
| 19 | CMDVCC | Active-low initiation signal - starts full activation sequence including VCC ramp, CLK enable, and RST timing |
| 20 | RSTIN | Host-provided reset input - controls RST output timing post-activation; no effect before t5 |
| 21 | VDD | Digital supply input - powers all logic, sequencer, and I/O transceivers; must match host MCU voltage |
| 22 | GND | Digital ground reference - separate from CGND; requires low-impedance PCB connection |
| 23 | OFF | Active-low status interrupt - indicates card presence (CMDVCC high) or fault (CMDVCC low); includes 24kΩ internal pullup to VDD |
| 24, 25 | XTAL1, XTAL2 | Clock source inputs - accept 20MHz crystal or external clock; XTAL1 alone suffices for buffered input |
| 26 | I/OIN | Host-to-IC data line - level-shifted to smart card I/O voltage; 11kΩ pullup to VDD in inactive mode |
Key Features
| Feature | Design Value |
|---|---|
| Triple-Voltage Card Supply Generation | Internally generates precise 5V±5%, 3V±8%, and 1.8V±10% VCC - eliminates need for external LDOs or charge pumps |
| Hardware-Controlled Activation Sequencer | Automates ISO 7816-compliant power-up: VCC ramp, CLK start, RST assertion, and I/O enable - reduces host firmware overhead |
| Ultra-Low-Power Stop Mode | Enters <10nA state when CMDVCC, 5V/3V, and 1_8V are all high - ideal for always-on, battery-powered secure readers |
| Integrated Fault Protection | Detects VCC short-circuit, card removal mid-session, VDD dropout, and overheating (>150°C) - triggers automatic emergency deactivation |
| ISO 7816-3 Compliant I/O Transceiver | Supports 1MHz max data rate with active pullup, 15mA current limiting, and bidirectional edge-synchronized logic - ensures reliable ATR and T=0/T=1 protocol handling |
Applications
| Banking POS Terminal | PIN Pad |
|---|---|
Use Scenario: Secure debit/credit transaction at retail point-of-sale, requiring EMV 2000-compliant card power, clock, and reset sequencing. IC Role / Device Role / Timing Role: Smart card analog front-end - provides regulated VCC, ISO-specified CLK timing, and sequenced RST assertion per EMV kernel requirements. Use Value: Eliminates discrete voltage regulators and timing logic; guarantees <220μs activation time for sub-second ATR response and reduced customer wait time. |
Use Scenario: Portable handheld device capturing encrypted PIN entry using embedded SIM or payment card. IC Role / Device Role / Timing Role: Low-power smart card interface - delivers 1.8V/30mA VCC and <10nA stop mode to extend single-charge battery life beyond 1 year. Use Value: Enables always-on card detection with zero active leakage; hardware debounce prevents false card-insertion interrupts during transport. |
| Telecom SIM Reader | Access Control Panel |
Use Scenario: Embedded GSM module in IoT gateway reading subscriber identity module (SIM) for network authentication. IC Role / Device Role / Timing Role: SIM interface controller - supports 1.8V/3V SIM cards, provides 80mA 5V VCC for optional SAM co-processor, and handles hot-plug detection. Use Value: Single-chip solution replaces legacy TDA8024-based designs; pin-compatible with DS8314-RRX+ for upgrade paths in existing telecom hardware. |
Use Scenario: Physical access terminal verifying employee smart cards at building entry points, operating 24/7 with minimal maintenance. IC Role / Device Role / Timing Role: Robust card interface IC - withstands ±8kV HBM ESD on exposed card contacts and detects card removal mid-read to prevent credential replay. Use Value: Reduces field failure rate in uncontrolled environments; integrated fault detection avoids corrupted sessions and improves audit trail integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar smart card interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS8314-RRX+ | Single VDDA input only; reduced 5V card drive capability (no guaranteed 80mA @ 5V) | Suitable for lower-current 5V cards or 3V/1.8V-only systems; fits TDA8024 sockets with no PCB changes | Select DS8314-RRX+ when cost sensitivity outweighs full 5V/80mA headroom and legacy socket compatibility is required. |
| MAX3232ESE+ | RS-232 transceiver - no smart card voltage generation, clock control, or activation sequencing | Only usable as level shifter between UART and DS8313-RRX+ I/OIN/I/O; cannot replace DS8313-RRX+ functionally | Use MAX3232ESE+ only as companion UART interface; never as functional substitute for DS8313-RRX+ in smart card power/control path. |
Compared with DS8314-RRX+, DS8313-RRX+ provides higher 5V current headroom and dual VDDA routing for enhanced reliability in full-featured banking terminals; compared with MAX3232ESE+, it delivers complete ISO 7816 analog front-end functionality-not just signal translation.
Availability
DS8313-RRX+ is available at Aetrix Electronics and suitable for banking POS terminals, telecom SIM readers, and secure access control systems requiring stable component supply across extended product lifecycles.
Supply support for DS8313-RRX+ 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 high-performance analog, mixed-signal, and power management ICs for industrial, communications, and security applications.
The DS8313-RRX+ belongs to Maxim's smart card interface product line, engineered specifically for ISO 7816-compliant embedded readers where low power, integrated voltage generation, and autonomous sequencing reduce system-level design complexity.
FAQ
What is the primary function of the DS8313-RRX+ in a smart card system?
The DS8313-RRX+ serves as a complete analog front-end for ISO 7816 smart cards, providing regulated VCC (1.8V/3V/5V), level-shifted bidirectional I/O, programmable CLK generation, sequenced RST control, and fault-protected card interface-all without requiring external charge pumps or discrete regulators. It directly replaces discrete solutions in DS8313-RRX+ designs.
Does the DS8313-RRX+ support 1.8V smart cards, and how is voltage selected?
Yes, the DS8313-RRX+ supports 1.8V smart cards via the dedicated 1_8V pin. When 1_8V is asserted high, it overrides the 5V/3V pin and configures the internal regulator to deliver 1.8V ±10% at up to 30mA to the VCC pin - confirmed in Table 3 and the VCC Generator section of the datasheet.
What is the significance of the 10nA stop-mode current specification for DS8313-RRX+?
The <10nA stop-mode current allows DS8313-RRX+ to maintain card presence monitoring indefinitely on coin-cell or small Li-ion batteries - enabling multi-year operation in portable PIN pads and secure tokens. This value is measured with CMDVCC, 5V/3V, and 1_8V all held high while the interface is inactive.
How does the DS8313-RRX+ handle card insertion and removal events?
The DS8313-RRX+ uses the PRES pin with built-in 8ms hardware debounce to reject mechanical switch bounce. Upon valid insertion, it asserts OFF after debounce; upon removal during a session, it triggers automatic emergency deactivation - pulling RST low, halting CLK, and ramping VCC to zero - all confirmed in the Deactivation Sequence and Fault Detection sections.
Can the DS8313-RRX+ be used in place of the TDA8024 in existing designs?
No - the DS8313-RRX+ is not pin-compatible with the TDA8024. However, the DS8314-RRX+ variant (a related part) is explicitly stated to "drop into many TDA8024 sockets without hardware changes." DS8313-RRX+ offers higher performance but requires PCB redesign due to different pin count and function mapping.
DS8313-RRX+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Smart Card
- Interface:
- Analog
- Voltage - Supply:
- 2.7V ~ 6V
- Supplier Device Package:
- 28-SOIC
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
DS8313-RRX+ FAQ
1.How can I place an order for DS8313-RRX+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS8313-RRX+ 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 DS8313-RRX+ reliable?
The price and inventory of DS8313-RRX+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS8313-RRX+ is usually 5 days.
3.What payment methods are accepted for DS8313-RRX+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS8313-RRX+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS8313-RRX+?
DS8313-RRX+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS8313-RRX+ 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 DS8313-RRX+?
For technical support, including DS8313-RRX+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS8313-RRX+ requirements.
6.How does Aetrix verify that DS8313-RRX+ is sourced from the original manufacturer or authorized distributors?
All DS8313-RRX+ 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 DS8313-RRX+ meets industry standards.
7.What is the process for return or replacement of DS8313-RRX+?
All DS8313-RRX+ units undergo pre-shipment inspection (PSI). If there is an issue with DS8313-RRX+, 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 DS8313-RRX+ part is unused and in its original packaging.
Return procedure for DS8313-RRX+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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