component

MM74HC273MTC

Public Made by Adom

by adom

onsemi Flip Flops, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentlogic icsmm74hc273mtcfactory-2.0.0extractor-text
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

PCB Footprint

Open full view ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.

Datasheet

Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Download PDF
Contents

README

markdown

MM74HC273MTC

onsemi · Flip Flops · TSSOP-20

MM74HC273MTC from onsemi, in a TSSOP-20. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 CLEAR input Common active-low asynchronous clear input that sets all eight Q outputs low when held LOW.
2 1Q output Flip-flop 1 Q output, drives up to 10 LS-TTL loads.
3 1D input Flip-flop 1 data input, transferred to 1Q on the LOW-to-HIGH transition of CLOCK.
4 2D input Flip-flop 2 data input, transferred to 2Q on the LOW-to-HIGH transition of CLOCK.
5 2Q output Flip-flop 2 Q output, drives up to 10 LS-TTL loads.
6 3Q output Flip-flop 3 Q output, drives up to 10 LS-TTL loads.
7 3D input Flip-flop 3 data input, transferred to 3Q on the LOW-to-HIGH transition of CLOCK.
8 4D input Flip-flop 4 data input, transferred to 4Q on the LOW-to-HIGH transition of CLOCK.
9 4Q output Flip-flop 4 Q output, drives up to 10 LS-TTL loads.
10 GND power_in Ground reference for the device.
11 CLOCK input Common clock input, data is transferred to the outputs on the LOW-to-HIGH transition.
12 5Q output Flip-flop 5 Q output, drives up to 10 LS-TTL loads.
13 5D input Flip-flop 5 data input, transferred to 5Q on the LOW-to-HIGH transition of CLOCK.
14 6D input Flip-flop 6 data input, transferred to 6Q on the LOW-to-HIGH transition of CLOCK.
15 6Q output Flip-flop 6 Q output, drives up to 10 LS-TTL loads.
16 7Q output Flip-flop 7 Q output, drives up to 10 LS-TTL loads.
17 7D input Flip-flop 7 data input, transferred to 7Q on the LOW-to-HIGH transition of CLOCK.
18 8D input Flip-flop 8 data input, transferred to 8Q on the LOW-to-HIGH transition of CLOCK.
19 8Q output Flip-flop 8 Q output, drives up to 10 LS-TTL loads.
20 VCC power_in Positive supply voltage, recommended 2 V to 6 V (absolute maximum 7.0 V).

Key specifications

Parameter Value
Manufacturer onsemi
Package TSSOP-20
Category Logic ICs
Pins 20

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage VCC -0.5 7 V 4
DC Input Voltage VIN -1.5 1.5 V -1.5 to VCC+1.5V; max given as offset above VCC 4
DC Output Voltage VOUT -0.5 0.5 V -0.5 to VCC+0.5V; max given as offset above VCC 4
Clamp Diode Current IIK, IOK -20 20 mA 4
DC Output Current, per pin IOUT -25 25 mA 4
DC VCC or GND Current, per pin ICC -50 50 mA 4
Storage Temperature Range TSTG -65 150 °C 4
Power Dissipation PD 600 mW S.O. Package only: 500 mW 4
Lead Temperature TL 260 °C Soldering 10 seconds 4
Supply Voltage VCC 2 6 V 4
DC Input or Output Voltage VIN, VOUT 0 6 V 0 to VCC; max given as VCC 4
Operating Temperature Range TA -40 85 °C 4
Input Rise or Fall Time tr, tf 1000 ns VCC = 2.0V 4
Input Rise or Fall Time tr, tf 500 ns VCC = 4.5V 4
Input Rise or Fall Time tr, tf 400 ns VCC = 6.0V 4
Minimum HIGH Level Input Voltage VIH 1.5 V VCC = 2.0V, TA = -40 to 85°C 4
Minimum HIGH Level Input Voltage VIH 3.15 V VCC = 4.5V, TA = -40 to 85°C 4
Minimum HIGH Level Input Voltage VIH 4.2 V VCC = 6.0V, TA = -40 to 85°C 4
Maximum LOW Level Input Voltage VIL 0.5 V VCC = 2.0V, TA = -40 to 85°C 4
Maximum LOW Level Input Voltage VIL 1.35 V VCC = 4.5V, TA = -40 to 85°C 4
Maximum LOW Level Input Voltage VIL 1.8 V VCC = 6.0V, TA = -40 to 85°C 4
Minimum HIGH Level Output Voltage VOH 1.9 2 V VIN = VIH or VIL, /IOUT/ ≤ 20 µA, VCC = 2.0V, TA = -40 to 85°C 4
Minimum HIGH Level Output Voltage VOH 4.4 4.5 V VIN = VIH or VIL, /IOUT/ ≤ 20 µA, VCC = 4.5V, TA = -40 to 85°C 4
Minimum HIGH Level Output Voltage VOH 5.9 6 V VIN = VIH or VIL, /IOUT/ ≤ 20 µA, VCC = 6.0V, TA = -40 to 85°C 4
Minimum HIGH Level Output Voltage VOH 3.84 4.2 V VIN = VIH or VIL, /IOUT/ ≤ 4.0 mA, VCC = 4.5V, TA = -40 to 85°C 4
Minimum HIGH Level Output Voltage VOH 5.34 5.7 V VIN = VIH or VIL, /IOUT/ ≤ 5.2 mA, VCC = 6.0V, TA = -40 to 85°C 4
Maximum LOW Level Output Voltage VOL 0 0.1 V VIN = VIH or VIL, /IOUT/ ≤ 20 µA, VCC = 2.0V, TA = -40 to 85°C 4
Maximum LOW Level Output Voltage VOL 0.2 0.33 V VIN = VIH or VIL, /IOUT/ ≤ 4 mA, VCC = 4.5V, TA = -40 to 85°C 4
Maximum Input Current IIN -1 1 µA VIN = VCC or GND, VCC = 6.0V, TA = -40 to 85°C 4
Maximum Quiescent Supply Current ICC 8 80 µA VIN = VCC or GND, IOUT = 0 µA, VCC = 6.0V, TA = -40 to 85°C 4
Maximum Operating Frequency fMAX 4 16 MHz VCC = 2.0V, TA = -40 to 85°C 5
Maximum Operating Frequency fMAX 21 74 MHz VCC = 4.5V, TA = -40 to 85°C 5
Maximum Operating Frequency fMAX 24 78 MHz VCC = 6.0V, TA = -40 to 85°C 5
Maximum Propagation Delay, Clock to Output tPHL, tPLH 38 170 ns VCC = 2.0V, TA = -40 to 85°C, CL = 50 pF 5
Maximum Propagation Delay, Clock to Output tPHL, tPLH 14 34 ns VCC = 4.5V, TA = -40 to 85°C, CL = 50 pF 5
Maximum Propagation Delay, Clock to Output tPHL, tPLH 12 29 ns VCC = 6.0V, TA = -40 to 85°C, CL = 50 pF 5
Maximum Propagation Delay, Clear to Output tPHL 42 170 ns VCC = 2.0V, TA = -40 to 85°C, CL = 50 pF 5
Maximum Propagation Delay, Clear to Output tPHL 19 34 ns VCC = 4.5V, TA = -40 to 85°C, CL = 50 pF 5
Maximum Propagation Delay, Clear to Output tPHL 18 29 ns VCC = 6.0V, TA = -40 to 85°C, CL = 50 pF 5
Minimum Removal Time, Clear to Clock tREM 0 32 ns VCC = 2.0V, TA = -40 to 85°C 5
Minimum Removal Time, Clear to Clock tREM 0 6 ns VCC = 4.5V, TA = -40 to 85°C 5
Minimum Removal Time, Clear to Clock tREM 0 5 ns VCC = 6.0V, TA = -40 to 85°C 5
Minimum Setup Time, Data to Clock ts 26 125 ns VCC = 2.0V, TA = -40 to 85°C 5
Minimum Setup Time, Data to Clock ts 7 25 ns VCC = 4.5V, TA = -40 to 85°C 5
Minimum Setup Time, Data to Clock ts 5 21 ns VCC = 6.0V, TA = -40 to 85°C 5
Minimum Hold Time, Clock to Data tH 15 0 ns VCC = 2.0V, TA = -40 to 85°C 5
Minimum Hold Time, Clock to Data tH 6 0 ns VCC = 4.5V, TA = -40 to 85°C 5
Minimum Hold Time, Clock to Data tH 4 0 ns VCC = 6.0V, TA = -40 to 85°C 5
Minimum Pulse Width, Clock or Clear tW 34 100 ns VCC = 2.0V, TA = -40 to 85°C 5
Minimum Pulse Width, Clock or Clear tW 11 20 ns VCC = 4.5V, TA = -40 to 85°C 5
Minimum Pulse Width, Clock or Clear tW 10 18 ns VCC = 6.0V, TA = -40 to 85°C 5
Maximum Output Rise and Fall Time tTHL, tTLH 28 95 ns VCC = 2.0V, TA = -40 to 85°C 5
Maximum Output Rise and Fall Time tTHL, tTLH 11 19 ns VCC = 4.5V, TA = -40 to 85°C 5
Maximum Output Rise and Fall Time tTHL, tTLH 9 16 ns VCC = 6.0V, TA = -40 to 85°C 5
Maximum Input Capacitance CIN 7 10 pF TA = -40 to 85°C 5
Power Dissipation Capacitance (per flip-flop) CPD 45 pF Note 5 5

CAD (KiCad official)

  • Symbol: MM74HC273MTC
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: mm74hc273mtc-etched.step / mm74hc273mtc-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mm74hc273mtc.step / mm74hc273mtc.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: onsemi datasheet (10 pp, sha256 62fb601c88bbaa9d, retrieved 2026-10-22, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF