AT88SC25616C-SI Atmel, AT88SC25616C-SI Datasheet - Page 2

• Manufacturer Part Number: AT88SC25616C-SI
• Manufacturer: Atmel

Specifications of AT88SC25616C-SI

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Package Type: SOIC
• Mounting: Surface Mount
• Pin Count: 8
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Not Compliant

Smart Card Applications
Embedded Applications
Pin Descriptions
Supply Voltage (V
Clock (SCL/CLK)
2
AT88SC25616C
Description
CC
)
The AT88SC25616C member of the CryptoMemory family is a high-performance secure
memory providing 256 Kbits of user memory with advanced security and cryptographic
features built in. The user memory is divided into 16 2-byte zones, each of which may be
individually set with different security access rights or combined together to provide
space for 1 to 4 data files.
The AT88SC25616C provides high security, low cost, and ease of implementation with-
out the need for a microprocessor operating system. The embedded cryptographic
engine provides for dynamic, symmetric-mutual authentication between the device and
host, as well as performing stream encryption for all data and passwords exchanged
between the device and host. Up to four unique key sets may be used for these opera-
tions. The AT88SC25616C offers the ability to communicate with virtually any smart
card reader using the asynchronous T = 0 protocol (Gemplus Patent) defined in ISO
7816-3. Communication speeds up to 153,600 baud are supported by utilizing ISO
7816-3 Protocol and Parameter Selection.
Through dynamic, symmetric-mutual authentication, data encryption, and the use of
encrypted checksums, the AT88SC25616C provides a secure place for storage of sen-
sitive information within a system. With its tamper detection circuits, this information
remains safe even under attack. A 2-wire serial interface running at 1.5 MHz is used for
fast and efficient communications with up to 15 devices that may be individually
addressed. The AT88SC25616C is available in industry standard 8-lead packages with
the same familiar pinout as 2-wire serial EEPROMs.
Figure 1. Block Diagram
The V
In the asynchronous T = 0 protocol, the SCL/CLK input is used to provide the device
with a carrier frequency f. The nominal length of one bit emitted on I/O is defined as an
“elementary time unit” (ETU) and is equal to 372/f.
When the synchronous protocol is used, the SCL/CLK input is used to positive edge
clock data into the device and negative edge clock data out of the device.
SCL/CLK
SDA/IO
GND
CC
VCC
RST
input is a 2.7V to 5.5V positive voltage supplied by the host.
Asynchronous
ISO Interface
Management
Synchronous
Reset Block
Interface
Power
Certification Unit
Answer to Reset
Encryption and
Authentication,
Data Transfer
Verification
Password
Generator
EEPROM
Random
5017DS–SMEM–7/04