73S8014BN Datasheet, PDF (1/29 Pages) Maxim Integrated Products – Smart Card Interface

19-5669; Rev 2; 12/11
73S8014BN
Smart Card Interface
DS_8014BN_057
DESCRIPTION
The 73S8014BN is a single smart card (ICC) interface circuit
designed to provide full electrical compliance with ISO 7816-3,
EMV® 4.2, and NDS specifications. It is derived from the
73S8024RN industry-standard electrical interface, but adds
support for 1.8V smart card applications. The 73S8014BN has
been optimized to match set-top box/A/V conditional access
applications. The optimization adds functionality while creating
a device with a smaller pin count. For NDS applications
requiring an on-chip adjustable POR, see the Maxim
73S8024RN series of interface ICs.
The 73S8014BN interfaces with the host processor through the
same bus (digital I/Os) as the 73S8024RN and most other
8024 type devices. As a result, the 73S8014BN is a very
attractive cost-reduction path from traditional 8024 ICs.
Interfacing with the system controller is done through a control
bus, composed of digital inputs to control the 73S8014BN, and
one interrupt output to inform the system controller of the card
presence, device readiness and faults.
The card clock can be generated by an on-chip oscillator using
an external crystal or by connection to an externally supplied
clock signal. In addition, the clock divider provides divisor
values of divide by 1, 2, 4, and 8 that are controlled through a
single pin.
The 73S8014BN incorporates an ISO 7816-3
activation/deactivation sequencer that controls the card
signals. Level-shifters drive the card signals with the selected
card voltage (1.8V, 3V, or 5V), coming from an internal low
dropout (LDO) voltage regulator. This LDO regulator is
powered by a dedicated power-supply input, VPC. Digital
circuitry is powered separately by a digital power supply, VDD.
With its embedded LDO regulator, the 73S8014BN is a cost-
effective solution for any application where a 5V (typically -5%
+10%) power supply is available.
Emergency card deactivation is initiated upon card extraction
or upon any fault detected by the protection circuitry. The fault
can be a card overcurrent, VCC undervoltage, or power-supply
fault (VDD). The card overcurrent circuitry is a true current-
detection function, as opposed to VCC voltage drop detection,
as usually implemented in non-Maxim 8024 interface ICs.
The 73S8014BN contains a power-down mode with typical
power consumption of 1µA on each of the VDD and VPC
supplies. The power-down mode is controlled through existing
control pins without the need for a dedicated control pin.
APPLICATIONS
• Set-Top Box Conditional Access and Pay-per-View
• General-Purpose Smart Card Readers
ADVANTAGES
• NDS Compliant
• Same Advantages as the Maxim 73S80xxR Family:
 Card VCC Generated by an LDO Regulator
 Very Low Power Dissipation (Saves Up to 1/2W)
 Fewer External Components Are Required
 Better Noise Performance
• True Card Overcurrent Detection
• Firmware Compatibility with 8024 ICs
• Small-Format 20-Pin SO Package Capable of Fully
Supporting NDS Applications
• Power-Down Mode
FEATURES
• Card Interface
 Complies with ISO 7816-3, EMV 4.2, and NDS
 Supports 3V/5V Cards Up to 65mA and 1.8V Cards Up
to 40mA
 ISO 7816-3 Activation/Deactivation Sequencer
 Automated Deactivation Upon Hardware Fault (i.e.,
Upon Drop on VDD Power Supply or Card Overcurrent)
 Overcurrent Detection 145mA max
 Card CLK Clock Frequency Up to 20MHz
• System Controller Interface
 Three Digital Inputs Control the Card
Activation/Deactivation, Card Reset, Power-Down, and
Card Voltage
 One Digital Input Controls the Card Clock Frequency
 One Digital Output, Interrupt to the System Controller,
Reports to the Host the Card Presence, Device
Readiness, and Faults
 Crystal Oscillator or Host Clock, Up to 27MHz
• Regulator Power Supply
 4.75V to 5.5V (EMV 4.2)
 4.85V to 5.5V (NDS)
• Digital Interfacing: 2.7V to 3.6V
• ±6kV ESD Protection on the Card Interface
• 20-Pin SO Package
• RoHS-Compliant (6/6)/Lead(Pb)-Free Package
EMV is a registered trademark of EMVCo LLC.
Rev. 2
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