TTL Electrical Inverter
Digital
·
Generic
·
Curated by CircuitSim
Details
Manufacturer
Generic
Part number
—
Pins
4
Used in
No circuits
Added
Sep 2026
About this component
Supply-aware generic TTL-family teaching inverter with finite input loading, asymmetric output resistance, propagation delay, rail offsets, input/output capacitance, and quiescent current. It is an educational family model, not a specific 74-series part.
Parameters
Logic levels and noise margins
4 parameters
VIL
Maximum low input voltage
Family VIL limit used with VIH to define the switching midpoint and low-state noise margin.
0.8 V
VIH
Minimum high input voltage
Family VIH limit used with VIL to define the switching midpoint and high-state noise margin.
2 V
VOH_DROP
Unloaded high-level drop
Voltage subtracted from VCC before high-state loading.
1.3 V
VOL_OFFSET
Unloaded low-level offset
Baseline low-output voltage before sink-current loading.
0.15 V
Electrical loading
6 parameters
ROUT_H
High-state output resistance
Thevenin resistance while sourcing a logic high.
130 ohm
ROUT_L
Low-state output resistance
Thevenin resistance while sinking a logic low.
25 ohm
RIN_P
Input pull-up resistance
Simplified TTL input current path from VCC to IN.
12.5k ohm
RIN_N
Input leakage resistance
Simplified high-input leakage path from IN to GND.
250k ohm
CIN
Input capacitance
Capacitive load presented at IN.
3p F
COUT
Internal output capacitance
Internal output capacitance added to external loads.
3p F
Timing and power
2 parameters
TPD
Propagation delay
Approximate input-to-output 50% delay before external load effects.
10n s
IQ
Quiescent supply current
Static current drawn from VCC to GND.
2m A
Pins
Pins
4 pins
1
IN
TTL-family logic input with finite pull-up, leakage resistance, and capacitance.
2
OUT
Inverted output with finite high- and low-state resistance.
3
VCC
Positive logic supply; use a current probe here for supply-current and power lessons.
4
GND
Logic-supply reference.
Public circuits using this component
No public circuits are using this component yet.
Drop TTL Electrical Inverter into your circuit
Official component · simulated with full SPICE accuracy · free to get started.