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Symbols
- fmax
- Maximum clock frequency; highest rate at which a clock input can be
driven and still maintain stable transitions.
- ICC
- The current drawn by the macro, into the VCC supply pin of the circuit.
For individual macros, the current drawn by that macro (TYPICAL). When
computing the supply current for an array, it will be a function of
the macros used in the array plus the overhead current for the I/O mode.
It may also be a function of the number of TTL input macros.
- ICC HIGH
- The current drawn by the macro when the output is logical HIGH.
- ICC HIGH-Z
- The current drawn by the macro when the output of high-impedance OFF.
- ICC LOW
- The current drawn by the macro when the output is logical LOW.
- IEE
- The current drawn by the macro, into the VEE supply of the circuit.
For individual macros, the current drawn by that macro (TYPICAL). When
computing the supply current for an array, it will be a function of
the macros used in the array plus the overhead current for the I/O mode.
- II
- Input HIGH current at maximum Vin.
- IIL
- TTL input current when the input logic level is LOW.
- IIH
- TTL input current when the input logic level is HIGH.
- IOH
- TTL output current when the output logic level is HIGH.
- IOL
- TTL output current when the output logic level is LOW. The current
drawn by the macro is the sink capability of an output. For AMCC bipolar
Logic Arrays this is 20 mA.
- IOS
- Output short circuit current.
- PW
- Pulse width. The minimum time required between edges of the driving
signal. AMCC specifies PW as the worst-case (the minimum for which operation
is guaranteed).
- Th
- Hold time; the minimum time between the application of an active edge
of the clock signal and the removal of the data signal being clocked.
A negative hold time implies that the data may be removed before the
arrival of the active edge of the clocking signal.
- TJ
- Junction temperature of a device; specified as the maximum for which
operation can be guaranteed. For MILITARY circuits, TJ = 150o C. For
COMMERCIAL circuits, TJ = 130o C.
- TPHL
- Propagation delay time, HIGH-to-LOW-level output.
- TPHZ
- Output disable time, HIGH-to-high-impedance (off) output.
- TPLH
- Propagation delay time, LOW-to-HIGH-level output.
- TPLZ
- Output disable time, LOW-to-high-impedance (off) output.
- TPZL
- Output enable time, high-impedance (off) to LOW output.
- TPZH
- Output enable time, high-impedance (off) to HIGH output.
- Trec
- Recovery time; the minimum time required between the removal of a
set or reset and the next active edge of the clock for the correct operation
of the device to be guaranteed.
- Tsu
- Set-up time; the minimum time between the application of a data signal
and the active edge of the clock. A negative set-up time implies that
the data must remain "set-up" after the active edge of the clock. AMCC
specifies Tsu as worst-case (the minimum for which operation is guaranteed).
- VIH
- High-level input voltage. The minimum voltage that should be applied
to the input of a device for a logical 1 voltage level. A maximum may
be specified; the input current will become very large if this maximum
is exceeded.
- VIK
- Input clamp diode voltage, limits input swing below ground (TTL).
- VIL
- Low-level input voltage. The maximum voltage that should be applied
to the input of the device for a logical 0 voltage level.
- VOH
- High-level output voltage.
- VOL
- Low-level output voltage.
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