Specifications
| Type | Description |
|---|---|
| Part Number | SN74HC574 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | SOIC-20 12.80 mm x 7.50 mm; SSOP-20 7.20 mm x 5.30 mm; PDIP-20 25.40 mm x 6.35 mm; SO-20 15.00 mm x 5.30 mm; TSSOP-20 6.50 mm x 4.40 mm; CDIP-20 26.92 mm x 6.92 mm; LCCC-20 8.89 mm x 8.45 mm; CFP-20 13.72 mm x 6.92 mm |
| Logic function | Octal edge-triggered D-type flip-flops with 3-state noninverting outputs; general device description; source page 1 |
| Supply voltage range | 2 V to 6 V; recommended operating conditions; source page 4 |
| Absolute maximum supply voltage range | -0.5 V to 7 V; over operating free-air temperature range; source page 4 |
| Input clamp current | +/-20 mA; VI < 0 or VI > VCC; source page 4 |
| Output clamp current | +/-20 mA; VO < 0 or VO > VCC; source page 4 |
| Continuous output current | +/-35 mA; VO = 0 V to VCC; source page 4 |
| Continuous current through VCC or GND | +/-70 mA; absolute maximum rating; source page 4 |
| Junction temperature | 150 °C; absolute maximum rating; source page 4 |
| Storage temperature range | -65 °C to 150 °C; absolute maximum rating; source page 4 |
| Operating free-air temperature - SN74HC574 | -40 °C to 85 °C; source page 4 |
| Operating free-air temperature - SN54HC574 | -55 °C to 125 °C; source page 4 |
| High-level input voltage at VCC = 2 V | 1.5 V min; source page 4 |
| High-level input voltage at VCC = 4.5 V | 3.15 V min; source page 4 |
| High-level input voltage at VCC = 6 V | 4.2 V min; source page 4 |
| Low-level input voltage at VCC = 2 V | 0.5 V max; source page 4 |
| Low-level input voltage at VCC = 4.5 V | 1.35 V max; source page 4 |
| Low-level input voltage at VCC = 6 V | 1.8 V max; source page 4 |
| Input voltage range | 0 V to VCC; recommended operating conditions; source page 4 |
| Output voltage range | 0 V to VCC; recommended operating conditions; source page 4 |
| Input transition rise/fall time at VCC = 2 V | 1000 ns max; source page 4 |
| Input transition rise/fall time at VCC = 4.5 V | 500 ns max; source page 4 |
| Input transition rise/fall time at VCC = 6 V | 400 ns max; source page 4 |
| Output drive current | +/-6 mA; VCC = 5 V feature rating; source page 1 |
| High-level output voltage, IOH = -20 uA, VCC = 2 V | 1.9 V min, 1.998 V typ; TA = 25°C; source page 5 |
| High-level output voltage, IOH = -20 uA, VCC = 4.5 V | 4.4 V min, 4.499 V typ; TA = 25°C; source page 5 |
| High-level output voltage, IOH = -20 uA, VCC = 6 V | 5.9 V min, 5.999 V typ; TA = 25°C; source page 5 |
| High-level output voltage, IOH = -6 mA, VCC = 4.5 V | 3.84 V min for SN74HC574, 3.7 V min for SN54HC574, 4.3 V typ; source page 5 |
| High-level output voltage, IOH = -7.8 mA, VCC = 6 V | 5.34 V min for SN74HC574, 5.2 V min for SN54HC574, 5.8 V typ; source page 5 |
| Low-level output voltage, IOL = 20 uA, VCC = 2 V | 0.002 V typ, 0.1 V max; source page 5 |
| Low-level output voltage, IOL = 20 uA, VCC = 4.5 V or 6 V | 0.001 V typ, 0.1 V max; source page 5 |
| Low-level output voltage, IOL = 6 mA, VCC = 4.5 V | 0.33 V max for SN74HC574, 0.4 V max for SN54HC574, 0.17 V typ; source page 5 |
| Low-level output voltage, IOL = 7.8 mA, VCC = 6 V | 0.33 V max for SN74HC574, 0.4 V max for SN54HC574, 0.15 V typ; source page 5 |
| Input current | +/-1000 nA max for SN74HC574, +/-100 nA max for SN54HC574, +/-0.1 nA typ; VI = VCC or 0 V, VCC = 6 V; source page 5 |
| 3-state output leakage current | +/-5 uA max for SN74HC574, +/-10 uA max for SN54HC574, +/-0.01 uA typ; VO = VCC or 0 V, VCC = 6 V; source page 5 |
| Supply current | 80 uA max for SN74HC574, 160 uA max for SN54HC574, 8 uA typ; VI = VCC or 0 V, IO = 0, VCC = 6 V; source page 5 |
| Input capacitance | 3 pF typ, 10 pF max; VCC = 2 V to 6 V; source page 5 |
| Clock frequency timing requirement at VCC = 2 V | 5 MHz min for SN74HC574, 4 MHz min for SN54HC574, 6 MHz min at TA = 25°C; source page 5 |
| Clock frequency timing requirement at VCC = 4.5 V | 24 MHz min for SN74HC574, 20 MHz min for SN54HC574, 30 MHz min at TA = 25°C; source page 5 |
| Clock frequency timing requirement at VCC = 6 V | 28 MHz min for SN74HC574, 24 MHz min for SN54HC574, 38 MHz min at TA = 25°C; source page 5 |
| Clock pulse duration high or low at VCC = 2 V | 100 ns min for SN74HC574, 120 ns min for SN54HC574, 80 ns min at TA = 25°C; source page 5 |
| Clock pulse duration high or low at VCC = 4.5 V | 20 ns min for SN74HC574, 24 ns min for SN54HC574, 16 ns min at TA = 25°C; source page 5 |
| Clock pulse duration high or low at VCC = 6 V | 17 ns min for SN74HC574, 20 ns min for SN54HC574, 14 ns min at TA = 25°C; source page 5 |
| Data setup time before CLK rising edge at VCC = 2 V | 125 ns min for SN74HC574, 150 ns min for SN54HC574, 100 ns min at TA = 25°C; source page 5 |
| Data setup time before CLK rising edge at VCC = 4.5 V | 25 ns min for SN74HC574, 30 ns min for SN54HC574, 20 ns min at TA = 25°C; source page 5 |
| Data setup time before CLK rising edge at VCC = 6 V | 21 ns min for SN74HC574, 26 ns min for SN54HC574, 17 ns min at TA = 25°C; source page 5 |
| Data hold time after CLK rising edge | 5 ns min; VCC = 2 V, 4.5 V, or 6 V; source page 5 |
| Maximum clock frequency, CL = 50 pF, VCC = 2 V | 5 MHz min for SN74HC574, 4 MHz min for SN54HC574, 11 MHz typ; source page 6 |
| Maximum clock frequency, CL = 50 pF, VCC = 4.5 V | 24 MHz min for SN74HC574, 20 MHz min for SN54HC574, 36 MHz typ; source page 6 |
| Maximum clock frequency, CL = 50 pF, VCC = 6 V | 28 MHz min for SN74HC574, 24 MHz min for SN54HC574, 40 MHz typ; source page 6 |
| Propagation delay time CLK to Q, CL = 50 pF, VCC = 2 V | 225 ns max for SN74HC574, 270 ns max for SN54HC574, 90 ns typ; source page 6 |
| Propagation delay time CLK to Q, CL = 50 pF, VCC = 4.5 V | 45 ns max for SN74HC574, 54 ns max for SN54HC574, 28 ns typ; source page 6 |
| Propagation delay time CLK to Q, CL = 50 pF, VCC = 6 V | 38 ns max for SN74HC574, 46 ns max for SN54HC574, 24 ns typ; source page 6 |
| Output enable time OE to Q, CL = 50 pF, VCC = 2 V | 190 ns max for SN74HC574, 225 ns max for SN54HC574, 77 ns typ; source page 6 |
| Output enable time OE to Q, CL = 50 pF, VCC = 4.5 V | 38 ns max for SN74HC574, 45 ns max for SN54HC574, 26 ns typ; source page 6 |
| Output disable time OE to Q, CL = 50 pF, VCC = 2 V | 190 ns max for SN74HC574, 225 ns max for SN54HC574, 52 ns typ; source page 6 |
| Output disable time OE to Q, CL = 50 pF, VCC = 4.5 V | 38 ns max for SN74HC574, 45 ns max for SN54HC574, 24 ns typ; source page 6 |
| Output transition time, CL = 50 pF, VCC = 2 V | 75 ns max for SN74HC574, 90 ns max for SN54HC574, 28 ns typ; source page 6 |
| Output transition time, CL = 50 pF, VCC = 4.5 V | 15 ns max for SN74HC574, 18 ns max for SN54HC574, 8 ns typ; source page 6 |
| Propagation delay time CLK to Q, CL = 150 pF, VCC = 2 V | 330 ns max for SN74HC574, 400 ns max for SN54HC574, 105 ns typ; source page 6 |
| Propagation delay time CLK to Q, CL = 150 pF, VCC = 4.5 V | 66 ns max for SN74HC574, 80 ns max for SN54HC574, 36 ns typ; source page 6 |
| Output enable time OE to Q, CL = 150 pF, VCC = 2 V | 295 ns max for SN74HC574, 355 ns max for SN54HC574, 95 ns typ; source page 6 |
| Output enable time OE to Q, CL = 150 pF, VCC = 4.5 V | 59 ns max for SN74HC574, 71 ns max for SN54HC574, 32 ns typ; source page 6 |
| Output transition time, CL = 150 pF, VCC = 2 V | 265 ns max for SN74HC574, 315 ns max for SN54HC574, 60 ns typ; source page 6 |
| Output transition time, CL = 150 pF, VCC = 4.5 V | 53 ns max for SN74HC574, 63 ns max for SN54HC574, 17 ns typ; source page 6 |
| Power dissipation capacitance per flip-flop | 100 pF typ; no load, TA = 25°C; source page 6 |
| Output enable behavior | OE low enables normal logic output; OE high places output in high-impedance state; function table; source page 8 |
| Clocking behavior | Data enters on low-to-high transition of CLK; detailed description; source page 8 |
| Bypass capacitor recommendation | 0.1 uF recommended; 0.1 uF and 1 uF commonly used in parallel; install close to power terminal; source page 9 |
| Junction-to-ambient thermal resistance | 109.1 °C/W SOIC, 122.7 °C/W SSOP, 84.6 °C/W PDIP, 113.4 °C/W SO, 131.8 °C/W TSSOP; SN74HC574 thermal information; source page 4 |
| Datasheet Status | request_only |
Product Overview
Recommended operation covers a 2 V to 6 V supply range, with input and output voltage ranges from 0 V to VCC. Logic input thresholds scale with VCC, including VIH minimums of 1.5 V at 2 V, 3.15 V at 4.5 V, and 4.2 V at 6 V. The device provides a ±6 mA output drive rating at 5 V and has specified clock frequency, setup, hold, propagation delay, output enable, disable, and transition timing across supply and load conditions.
Package options include SOIC-20, SSOP-20, PDIP-20, SO-20, TSSOP-20, CDIP-20, LCCC-20, and CFP-20. Assembly guidance includes placing a 0.1 uF bypass capacitor close to the power terminal, with 0.1 uF and 1 uF capacitors commonly used in parallel. These characteristics support use in clocked data registers, logic bus interfaces, output buffering, and controlled high-impedance signal paths.
Key Features
- Octal edge-triggered D-type flip-flop architecture
- 3-state noninverting outputs controlled by OE
- OE high places outputs in high-impedance state
- Data enters on CLK low-to-high transition
- Recommended supply voltage range from 2 V to 6 V
- Input and output voltage ranges track 0 V to VCC
- ±6 mA output drive current at 5 V
- SN74HC574 operating free-air range is -40 °C to 85 °C
- Input capacitance is 3 pF typical, 10 pF maximum
- Data hold time is 5 ns minimum
- Power dissipation capacitance is 100 pF typical per flip-flop
- 0.1 uF bypass capacitor recommended near power terminal
Typical Applications
- Clocked data registers
- 3-state logic bus interfaces
- Buffered digital output banks
- Microprocessor data latching
- Parallel signal storage
- Output isolation using OE control
- Low-voltage CMOS logic systems
Procurement Notes
When requesting a quote for SN74HC574, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of logic device is SN74HC574?
SN74HC574 is an octal edge-triggered D-type flip-flop with 3-state noninverting outputs. Data is captured on the low-to-high transition of CLK, and the OE input controls whether outputs are active or in high-impedance state.
What supply voltage range does SN74HC574 support?
The recommended operating supply voltage range is 2 V to 6 V. The absolute maximum supply voltage range is listed as -0.5 V to 7 V over the operating free-air temperature range.
How does the output enable input affect SN74HC574 outputs?
When OE is low, SN74HC574 enables normal logic output operation. When OE is high, the outputs are placed in the high-impedance state, allowing the device to support controlled bus connection or output isolation.
What package options are listed for SN74HC574?
The listed package options include SOIC-20, SSOP-20, PDIP-20, SO-20, TSSOP-20, CDIP-20, LCCC-20, and CFP-20, with package dimensions provided for each format in the extracted datasheet facts.
What bypass capacitor guidance is specified?
The datasheet facts recommend a 0.1 uF bypass capacitor installed close to the power terminal. They also note that 0.1 uF and 1 uF capacitors are commonly used in parallel.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 13, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.