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Altera Corporation
APEX 20K Programmable Logic Device Family Data Sheet
Preliminary Information
...and More
Features
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Designed for low-power operation
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1.8-V and 2.5-V supply voltage (see
Table 2)–
MultiVoltTM I/O interface support to interface with 1.8-V, 2.5-V,
3.3-V, and 5.0-Vdevices (see
Table 2)
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ESB offering programmable power-saving mode
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Flexible clock management circuitry with up to four phase-locked
loops (PLL)
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Built-in low-skew clock tree
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Up to eight global clock signals
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TM feature reducing clock delay and skew
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ClockBoostTM feature providing clock multiplication and
division
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ClockShiftTM programmable clock phase and delay shifting
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Powerful I/O features
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Compliant with peripheral component interconnect Special
Interest Group (PCI SIG) PCI Local Bus Specification,
Revision 2.2
for 3.3-V operation at 33 or 66 MHz and 32 or 64 bits
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Support for high-speed external memories, including DDR
SDRAM and ZBT SRAM (ZBT is a trademark of Integrated
Device Technology, Inc.)
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Bidirectional I/O performance (tCO + tSU) up to 370 MHz
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LVDS performance up to 624 Mbits per channel
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Direct connection from I/O pins to local interconnect providing
fast tCO and tSU times for complex logic
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MultiVolt I/O interface support to interface with 1.8-V, 2.5-V,
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Programmable clamp to VCCIO
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Individual tri-state output enable control for each pin
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Programmable output slew-rate control to reduce switching
noise
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Support for advanced I/O standards, including low-voltage
differential signaling (LVDS), LVPECL, PCI-X, AGP, CTT, stub-
series terminated logic (SSTL-3 and SSTL-2), and Gunning
transceiver logic plus (GTL+) and high-speed terminated logic
(HSTL Class I)
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Supports hot-socketing operation
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Pull-up on I/O pins before and during configuration