Texas Instruments TL431CPK Reference voltage Adj Shunt ADJUSTABLE PRECISION SHUNT REGULATOR
Product Specification
Features • 5 ns pin-to-pin logic delays • System frequency up to 178 MHz • 144 macrocells with 3,200 usable gates • Available in small footprint packages - 100-pin TQFP (81 user I/O pins) - 144-pin TQFP (117 user I/O pins) - 144-CSP (117 user I/O pins) - Pb-free available for all packages • Optimized for high-performance 3.3V systems - Low power operation - 5V tolerant I/O pins accept 5V, 3.3V, and 2.5V signals - 3.3V or 2.5V output capability - Advanced 0.35 micron feature size CMOS Fast FLASH™ technology • Advanced system features - In-system programmable - Superior pin-locking and routability with Fast CONNECT™ II switch matrix - Extra wide 54-input Function Blocks - Up to 90 product-terms per macrocell with individual product-term allocation - Local clock inversion with three global and one product-term clocks - Individual output enable per output pin with local inversion - Input hysteresis on all user and boundary-scan pin inputs - Bus-hold circuitry on all user pin inputs - Full IEEE Standard 1149.1 boundary-scan (JTAG) • Fast concurrent programming • Slew rate control on individual outputs • Enhanced data security features • Excellent quality and reliability - Endurance exceeding 10,000 program/erase cycles - 20 year data retention - ESD protection exceeding 2,000V • Pin-compatible with 5V-core XC95144 device in the 100-pin TQFP package WARNING: Programming temperature range of TA = 0° C to +70° C
Description
The XC95144XL is a 3.3V CPLD targeted for high-performance,
low-voltage applications in leading-edge communications
and computing systems. It is comprised of eight54V18 Function Blocks, providing 3,200 usable gates with
propagation delays of 5 ns.
Power Estimation
Power dissipation in CPLDs can vary substantially depending
on the system frequency, design application and output
loading. To help reduce power dissipation, each macrocell
in a XC9500XL device may be configured for low-power
mode (from the default high-performance mode). In addition,
unused product-terms and macrocells are automatically
deactivated by the software to further conserve power.
For a general estimate of ICC, the following equation may be
used:
ICC(mA) = MCHS(0.175*PTHS + 0.345) + MCLP(0.052*PTLP
+ 0.272) + 0.04 * MCTOG(MCHS +MCLP)* f
where:
MCHS = # macrocells in high-speed configuration
PTHS = average number of high-speed product terms
per macrocell
MCLP = # macrocells in low power configuration
PTLP = average number of low power product terms per
macrocell
f = maximum clock frequency
MCTOG = average % of flip-flops toggling per clock
(~12%)
This calculation was derived from laboratory measurements
of an XC9500XL part filled with 16-bit counters and allowing
a single output (the LSB) to be enabled. The actual ICC
value varies with the design application and should be verified
during normal system operation. Figure 1 shows the
above estimation in a graphical form. For a more detailed
discussion of power consumption in this device,
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XC95144XL-10TQG100C CPLD Complex Programmable Logic Device Images
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