Specifications

www.digikey.com/maxim-industrial 35
Programmable logic controllers (PLCs)
CPU functions
Benefits
• Improve system security
– Cryptographic hardware accelerators
for RSA, DSA, ECDSA, SHA-1, SHA-2, AES,
DES, and 3DES
– Security supervisor provides tamper
detection and response
– Cryptography engine execution at
65MHz
• Smallest board space requirement
– 6mm x 6 mm, 40-pin TQFN package
– 7mm x 7mm, 49-ball CSBGA package
MAXQ1850
The MAXQ1850 is the industry’s smallest, high-security microcon-
troller. This single-cycle RISC processor executes 16-bit instructions
and uses a 32-bit data path for unmatched processing efficiency
and C code optimization. With hardware-accelerated symmetric
and asymmetric encryption routines, it has the flexibility to be a
stand-alone controller or a coprocessor depending on the secure
application’s requirement.
System cost is highly optimized with integrated active tamper
sensors. These sensors detect and react to attacks by erasing the
internal, secure 8KB battery-backed nonvolatile SRAM. The micro-
controller only uses 130nA to back up the secure SRAM and operate
the tamper sensors.
Smallest secure microcontroller minimizes system size
Block diagram of the MAXQ1850.
JTAG
OSC/PLL
TIMERS/
COUNTERS
POWER
MANAGEMENT
INTERRUPT
CONTROLLER
8KB
SECURE
NV SRAM
WATCHDOG
256KB
FLASH
16KB
ROM
ISO 7816 USART SPI USB GPIOs
MAXQ30
32-BIT
RISC CORE
MMU
ENVIRONMENTAL
SENSORS
EXTERNAL SENSOR
CONTROLLER
SECURE RTC RNG
UNIQUE ID
AES
USER ENGINE
DES/3DES
USER ENGINE
2048-BIT MAA
(RSA, DSA, ECDSA)
CRC-16/32
GENERATOR
SHA-1, SHA-2
CORE
MAXQ1850