19-5669; Rev 2; 12/11
73S8014BN
Smart Card Interface
DS_8014BN_057
DESCRIPTION
APPLICATIONS
•
•
Set-Top Box Conditional Access and Pay-per-View
General-Purpose Smart Card Readers
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.
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
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.
•
•
•
True Card Overcurrent Detection
Firmware Compatibility with 8024 ICs
Small-Format 20-Pin SO Package Capable of Fully
Supporting NDS Applications
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.
•
Power-Down Mode
FEATURES
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.
•
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
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
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
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.
.
Three Digital Inputs Control the Card
Activation/Deactivation, Card Reset, Power-Down, and
Card Voltage
.
.
One Digital Input Controls the Card Clock Frequency
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.
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
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.
.
.
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
1
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