QPRO XQ4000E/EX QML High-Reliability FPGAs
16 www.xilinx.com DS021 (v2.2 ) June 25, 2000
1-800-255-7778 Product Specification
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XQ4000E IOB Output Switching Characteristic Guidelines
Testing of switching parameters is modeled after testing
methods specified by MIL-M-38510/605. All devices are
100% functionally tested. Internal timing parameters are
der ived from m easuring i nter n al tes t patter ns. Listed bel ow
are representative values. For more specific, more precise,
and worst-case guaranteed data, use the values reported
by the static timing analyzer (TRCE in the Xilinx Develop-
ment S y stem) and back-ann otated to th e simu lation n etlist.
These path delays, provided as a guideline, have been
extracted from the static timing analyzer report. All timing
parameters assume worst-case operating conditions (sup-
ply voltage and junction temperature). For Propagation
Delays, slew-rate = fast unless otherwise noted. Values
apply to all XQ400 0E devices unless othe rw ise noted.
Symbol Description -3 -4 UnitsMin Max Min Max
Propag a tion Delays (TTL Output Levels)
TOKPOF Clock (OK) to pad, fast - 6. 5 - 7.5 ns
TOKPOS Clock (OK) to pad, sl ew-rate limited - 9.5 - 11 .5 ns
TOPF O utp ut (O) to pad, fast - 5.5 - 8.0 ns
TOPS Outp ut (O) to pad, slew-rate limited - 8. 6 - 12.0 ns
TTSHZ 3-state to p ad High-Z, slew-ra te independent - 4.2 - 10 .0 ns
TTSONF 3-st ate to p ad active and valid, fast - 8.1 - 10.0 ns
TTSONS 3-state to pad active and valid, sl ew-ra te limited - 11. 1 - 13.7 ns
Propag a tion Delays (CMO S Output Levels)
TOKPOFC Clock (OK ) to pad, fast - 7.8 - 9.5 ns
TOKPOSC Cl ock (OK) to pad, slew-rate lim ited - 11.6 - 13 .5 ns
TOPFC Outp ut (O) to pad, fast - 9.7 - 10.0 ns
TOPSC Output (O) to pad, slew-rate limited - 13.4 - 14.0 ns
TTSHZC 3-state to pad High-Z, slew-rate independent - 4.3 - 5.2 ns
TTSONFC 3-state to pad active and valid, fast - 7. 6 - 9.1 ns
TTSONSC 3-st ate to pad active and valid, sl ew-ra te limited - 11.4 - 13 .1 ns
Setup and Hold Times
TOOK Output (O) to clock (OK) setup time 4.6 - 5.0 - ns
TOKO Output (O) to clock (OK) hold time 0 - 0 - ns
TECOK Cl ock ena ble (EC) to clock (OK) setup 3.5 - 4.8 - ns
TOKEC Clock ena ble (EC) to clock (OK) h old 1.2 - 1.2 - ns
Clock
TCH Clock High 4.0 - 4.5 - ns
TCL Clock Low 4.0 - 4.5 - ns
Global Set/Reset(3)
TRRO Delay from GSR net to pad - 11.8 - 15.0 ns
TMRW GSR width 11.5 - 13.0 - ns
TMRO GSR inactiv e to first active clock (OK) edge 11.5 - 13.0 - ns
Notes:
1. Output timi ng is meas ured a t pi n threshold, with 50 pF external cap acitiv e loads (inc l. test fixture). Slew-rate li mited output rise/fall
times are appro x imatel y two tim es lon ger than fast o utput rise /f al l tim es. F or t he e ff ect of c apacit iv e l oads on g r ound bounce, se e the
“Additional XC4000 Data” section on the Xilinx w eb site, www.xilinx.com/partinfo/databook.htm.
2. Voltage levels of unused pads, bonded or unbonded, must be valid logic levels. Each can be configured with the inter nal pull-up
(default) or pull-down resistor, or co nfigured as a driven output, or can be driv en from an external source.
3. Timing is based on the XC4005E. For other devices see the XACT timing calculator.