Advanced Very-Low-Voltage CMOS Logic Data Book.pdf

killerljj · 发表于 2007-7-13 19:53:57

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Advanced Very-Low-Voltage CMOS Logic Data Book.pdf

INTRODUCTION
The new Texas Instruments (TI) AVC (Advanced Very-Low-Voltage CMOS) logic family
provides designers the tools to create tomorrow’s advanced high-speed systems with
propagation delays of less than 2 ns. Although optimized for 2.5-V systems, AVC logic
supports operating voltages between 1.2 V and 3.6 V. The AVC family features TI’s new
Dynamic Output Control (DOC) circuitry, which dynamically lowers circuit output impedance
during signal transition for fast rise and fall times, then raises the impedance after signal
transition to reduce ringing.
Trends in digital electronics design emphasize lower power consumption, lower supply
voltages, faster operating speeds, smaller timing budgets, and heavier loads. Many designs
are making the transition from 3.3 V to 2.5 V, with bus speeds increasing beyond 100 MHz.
Signal integrity need not be compromised to meet these design requirements. The TI AVC
family is designed to meet the needs of these high-speed, low-voltage systems, including
next-generation high-performance workstations, PCs, networking servers, and
telecommunications switching equipment.
Key features are:
• Sub-2-ns maximum tpd at 2.5 V for AVC16245
• Designed for next-generation, high-performance PCs, workstations, and servers
• DOC circuitry enhances high-speed, low-noise operation.
• Supports mixed-voltage systems
• Optimized for 2.5 V; operable from 1.2 V to 3.6 V
• Bus-hold option eliminates need for external resistors on unused input pins.
• Ioff supports partial power down.