GAL20V8 Data Sheet - ZMiTAC

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Specifications GAL20V8 SWITCHING WAVEFORMS INPUT or I/O FEEDBACK VALID INPUT tsu th INPUT or I/O FEEDBACK COMBINATIONAL OUTPUT VALID INPUT tpd CLK REGISTERED OUTPUT tco 1/fmax (external fdbk) Combinatorial Output Registered Output INPUT or I/O FEEDBACK COMBINATIONAL OUTPUT tdis ten OE REGISTERED OUTPUT tdis ten Input or I/O to Output Enable/Disable OE to Output Enable/Disable twh twl CLK CLK 1/fmax (w/o fb) Clock Width REGISTERED FEEDBACK 1/fmax (internal fdbk) tcf tsu fmax with Feedback 14
Specifications GAL20V8 fmax DESCRIPTIONS CLK LOGIC ARRAY REGISTER CLK tsu tco fmax with External Feedback 1/(tsu+tco) LOGIC ARRAY REGISTER Note: fmax with external feedback is calculated from measured tsu and tco. CLK tcf tpd LOGIC ARRAY tsu + th REGISTER fmax with No Feedback Note: fmax with no feedback may be less than 1/(twh + twl). This is to allow for a clock duty cycle of other than 50%. fmax with Internal Feedback 1/(tsu+tcf) Note: tcf is a calculated value, derived by subtracting tsu from the period of fmax w/internal feedback (tcf = 1/fmax - tsu). The value of tcf is used primarily when calculating the delay from clocking a register to a combinatorial output (through registered feedback), as shown above. For example, the timing from clock to a combinatorial output is equal to tcf + tpd. SWITCHING TEST CONDITIONS +5V Input Pulse Levels GND to 3.0V Input Rise and GAL20V8B 2 – 3ns 10% – 90% Fall Times GAL20V8C 1.5ns 10% – 90% Input Timing Reference Levels 1.5V Output Timing Reference Levels 1.5V Output Load See Figure 3-state levels are measured 0.5V from steady-state active level. FROM OUTPUT (O/Q) UNDER TEST R 2 R 1 C * L TEST POINT *C L INCLUDES TEST FIXTURE AND PROBE CAPACITANCE GAL20V8B Output Load Conditions (see figure) Test Condition R1 R2 CL A 200Ω 390Ω 50pF B Active High ∞ 390Ω 50pF Active Low 200Ω 390Ω 50pF C Active High ∞ 390Ω 5pF Active Low 200Ω 390Ω 5pF GAL20V8C Output Load Conditions (see figure) Test Condition R1 R2 CL A 200Ω 200Ω 50pF B Active High ∞ 200Ω 50pF Active Low 200Ω 200Ω 50pF C Active High ∞ 200Ω 5pF Active Low 200Ω 200Ω 5pF 15
Page 1 and 2: I I I I I I GAL20V8 High Performanc
Page 3 and 4: Specifications GAL20V8 OUTPUT LOGIC
Page 5 and 6: Specifications GAL20V8 5 REGISTERED
Page 7 and 8: Specifications GAL20V8 7 COMPLEX MO
Page 9 and 10: Specifications GAL20V8 9 SIMPLE MOD
Page 11 and 12: Specifications GAL20V8C AC SWITCHIN
Page 13: Specifications GAL20V8B AC SWITCHIN
Page 17 and 18: Specifications GAL20V8 POWER-UP RES
Page 19 and 20: Specifications GAL20V8 GAL 20V8C: T
Page 21 and 22: Specifications GAL20V8 GAL 20V8B-7/
Page 23: Specifications GAL20V8 GAL 20V8B-15

GAL20V8 Data Sheet - ZMiTAC

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