SN74LS07DRE4 - Hex Buffer Open-Collector 30V | TI
MPN: SN74LS07DRE4 ✓ فعالSN74LS07DRE4 جائزہ
A buffer/driver is a logic element that isolates signal sources from loads and provides the current drive capability that standard logic outputs often lack. Within the power-management and interface hierarchy, buffers bridge low-power digital controllers and higher-current loads such as LEDs, relays, motors and high-level logic families. Open-collector buffers are a special class: the output transistor can only sink current, so the logic-high level is set by an external pull-up resistor, allowing level shifting between different voltage domains.
Key features of the SN74LS07 include a rated output voltage of 30 V on the open-collector stage, a maximum sink current of 40 mA per output, six independent non-inverting elements in one package, and classic Low-Power Schottky (LS) TTL bipolar technology. The DRE4 ordering suffix denotes the 14-SOIC package in tape-and-reel packaging for automated assembly.
Technically, the bipolar LS architecture provides fast switching with robust noise margins and rugged open-collector outputs suited for driving heavy loads. Because outputs are open-collector, they support wired-AND configurations where multiple outputs share a pull-up, a common technique for shared interrupt or status lines.
Typical applications include driving high-current LED indicators, interfacing 5 V logic to high-level circuits up to 30 V, relay and solenoid drive, and TTL input buffering in industrial control panels.
Design consideration: always provide a pull-up resistor to the desired high-level voltage; the open-collector output cannot source current, and the pull-up value trades speed against sink current.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
کے لیے ڈراپ اِن متبادل SN74LS07DRE4 — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں SN74LS07DRE4 (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Operating Temperature, Package, Packaging.
SN74LS07DR
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →SN74LS07DRG4
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
SN74LS07DE4
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
SN74LS07DG4
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
SN74LS07D
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →SN74LS07DRE4 زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Logic Function | Hex non-inverting buffer/driver |
| Number of Elements | 6 |
| Bits per Element | 1 |
| آؤٹ پٹ کی قسم | Open-collector |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Rated Output Voltage | 30 V |
| Maximum Sink Current | 40 mA |
| Technology Family | LS (Low-Power Schottky TTL) |
| Polarity | Non-inverting |
| پیکیج | 14-SOIC (D) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| آپریٹنگ درجہ حرارت | 0C to 70C |
| Packaging | Tape & Reel (DRE4) |
| RoHS اسٹیٹس | Compliant |
| Application | Buffer for driving TTL inputs; high-level interface circuits; high-current load drive |
SN74LS07DRE4 پن کنفیگریشن
| پن 1 | 1A — Buffer 1 input |
| پن 2 | 1Y — Buffer 1 open-collector output (30 V) |
| پن 3 | 2A — Buffer 2 input |
| پن 4 | 2Y — Buffer 2 open-collector output (30 V) |
| پن 5 | 3A — Buffer 3 input |
| پن 6 | 3Y — Buffer 3 open-collector output (30 V) |
| پن 7 | GND — Ground |
| پن 8 | 4Y — Buffer 4 open-collector output (30 V) |
| پن 9 | 4A — Buffer 4 input |
| پن 10 | 5Y — Buffer 5 open-collector output (30 V) |
| پن 11 | 5A — Buffer 5 input |
| پن 12 | 6Y — Buffer 6 open-collector output (30 V) |
| پن 13 | 6A — Buffer 6 input |
| پن 14 | VCC — Supply voltage, 4.75 V to 5.25 V |
عام استعمالات
SN74LS07DRE4 کے لیے موزوں ہے 6 ایپلیکیشنs: High-Level Circuit Interface, LED Display and Indicator Driving, Relay and Solenoid Drive, TTL Input Buffering, Wired-AND Shared Status Lines, Microcontroller Port Expansion to 24V Systems.
High-Level Circuit Interface
The SN74LS07DRE4 was designed specifically to interface 5 V TTL logic with high-level circuits, thanks to its 30 V rated open-collector outputs. A controller output at 5 V logic levels can safely drive loads referenced to rails as high as 30 V because the buffer output transistor only sinks current. Placing a pull-up resistor from the output to the high-level rail sets the logic-high voltage, allowing a 5 V microcontroller port to signal 24 V industrial I/O modules or legacy high-threshold circuits. The key performance consideration is pull-up sizing: smaller resistors switch faster but burn more power when the output is low, so designers typically choose 1-10 kilohms depending on speed and dissipation budgets.
تجویز کردہ
LED Display and Indicator Driving
With 40 mA sink capability per output and six independent channels, the SN74LS07DRE4 can directly drive high-current LEDs or LED segments that standard logic outputs cannot handle. The LED anode connects to a current-limited supply and the cathode to the buffer output; when the input goes high, the non-inverting buffer pulls the output low and the LED illuminates. This topology suits status indicators, numeric display segments, and panel lamps in test equipment. The open-collector structure permits LEDs on a different voltage rail than the IC supply, useful when mixing red/amber 5 V indicators with 12 V or 24 V panel lighting. A series resistor per LED is still required to limit current below the 40 mA rating.
تجویز کردہ
Relay and Solenoid Drive
The SN74LS07DRE4 serves as the interface stage between low-power logic and relay or solenoid coils when paired with a suitable external driver transistor. While its 40 mA sink current is too low for most coil currents directly, it robustly drives the base or gate of a power transistor, and its 30 V output rating tolerates inductive kickback transients that would destroy ordinary logic outputs. In industrial control panels, each of the six buffers can command one relay channel with a series base resistor, providing electrical isolation of the logic rail. A flyback diode across each coil remains mandatory; the 30 V open-collector rating absorbs residual spikes but does not replace proper inductive clamping.
تجویز کردہ
TTL Input Buffering
TI characterizes the SN74LS07 explicitly for use as a buffer driving TTL inputs, making it valuable where a weak signal source must fan out to multiple logic loads. One buffer output can sink the combined low-level input currents of several TTL gates while presenting a clean defined high level through its pull-up. This application suits clock or control-signal distribution on 5 V TTL backplanes, test fixtures, and legacy industrial boards. Because the device is non-inverting, the signal polarity is preserved, simplifying timing analysis versus inverting buffers. Designers should verify the pull-up value provides adequate rise time at the intended clock rate, as open-collector edges are RC-limited by the pull-up and line capacitance.
تجویز کردہ
Wired-AND Shared Status Lines
Open-collector outputs of the SN74LS07DRE4 can be tied together on a single pull-up resistor, creating a wired-AND bus where any buffer pulling low forces the shared line low. This is the classic implementation for shared interrupt, fault, or status lines in multi-board systems: each board drives one buffer input, and the common line signals whether any board is asserting a condition. The 30 V rating allows the shared bus to run at a higher rail than board logic, and the open-collector structure eliminates the bus contention that would occur with totem-pole outputs. Pull-up resistance must account for the total low-level sink current of all asserting outputs and bus capacitance for edge speed.
تجویز کردہ
Microcontroller Port Expansion to 24V Systems
In mixed-voltage embedded systems, the SN74LS07DRE4 converts 3.3 V or 5 V microcontroller GPIO signals to 12 V or 24 V domains. The LS TTL input thresholds accept standard logic drive, and each open-collector output can pull a 24 V pull-up rail, enabling direct signaling to PLC inputs, industrial sensors, and 24 V alarm loops. The DRE4 tape-and-reel format supports automated assembly for volume controller boards. Performance considerations include respecting the 40 mA sink limit per channel and allowing output rise time governed by the pull-up resistor and cable capacitance - for long cable runs, larger pull-up currents or external line drivers may be needed to maintain signal integrity.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا SN74LS07DRE4 — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | SN74LS07DR | SN74LS07DRG4 | SN74LS07DE4 | SN74LS07DG4 |
|---|---|---|---|---|---|
| Package | 14-SOIC (D) | 14-SOIC (D) - same | 14-SOIC (D) - same | 14-SOIC (D) - same | 14-SOIC (D) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Voltage Rating | 30 V | 30 V | 30 V | 30 V | 30 V |
| Maximum Sink Current | 40 mA | 40 mA | 40 mA | 40 mA | 40 mA |
| Supply Voltage | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V | 4.75 V to 5.25 V |
| Channels / Polarity | 6 ch, non-inverting | 6 ch, non-inverting | 6 ch, non-inverting | 6 ch, non-inverting | 6 ch, non-inverting |
| Packaging | Tape & Reel (DRE4) | Tape & Reel | Tape & Reel | Tube | Tube |
| Temperature Range | 0C to 70C | 0C to 70C | 0C to 70C | 0C to 70C | 0C to 70C |
اہم امتیازی خصوصیات
- Identical die at current ordering code (بمقابلہSN74LS07DR)
- 30 V open-collector outputs exceed most CMOS logic buffers (بمقابلہSN74LS07DE4)
- Tube packaging option for prototyping (بمقابلہSN74LS07DG4)
ڈیزائن نوٹس
The most common SN74LS07 design error is omitting the pull-up resistor. Open-collector outputs cannot source current, so an output left without a pull-up floats and never presents a valid logic high. Always connect a pull-up from each output to the desired high-level rail (which may be up to 30 V and need not equal VCC). A second pitfall: do not exceed 40 mA sink current per output. Estimated: with a 5 V pull-up and a 100-ohm pull-up resistor, sinking current reaches about 50 mA, exceeding the rating - use at least 150 ohms at 5 V, or a higher value for headroom.
Power dissipation is dominated by pull-up resistor current when outputs are low. Estimated: six outputs each sinking 16 mA from a 24 V rail through 1.5-kilohm pull-ups dissipate roughly 0.38 W total across the resistors (not the IC), while the IC itself dissipates the output saturation voltage times sink current, on the order of a few hundred milliwatts worst case. Keep the output saturation voltage (typically under 0.7 V at rated current per LS-family characteristics) in mind and verify total board thermal budget. Choose pull-up values trading bus rise time (RC with bus capacitance) against continuous low-state current draw.
Place a 0.1-uF ceramic decoupling capacitor close to the VCC pin (pin 14) with a solid connection to GND (pin 7), especially when the open-collector outputs sink fast load-current transitions; the sinking transients couple into the supply rail. Route high-current load paths (LED, relay driver returns) away from the LS input traces to protect TTL input noise margins. For wired-AND buses, keep the shared trace short and consider a small capacitor-free layout with consistent pull-up placement to preserve edge symmetry across the bus.
Open-collector output edges are RC-limited: rise time equals approximately pull-up resistance times total node capacitance. Estimated: a 4.7-kilohm pull-up with 100 pF of bus capacitance gives a 0.47-microsecond rise-time constant - too slow for fast clock distribution but fine for status lines. For clock buffering, use lower pull-up values (470 ohms to 1 kilohm, watching sink current against the 40 mA limit) or select a totem-pole output buffer instead. Verify VIL/VIH TTL input thresholds on receiving devices when level shifting between rails.
تعمیل کی معلومات
The E4 suffix in TI ordering codes denotes lead-free, RoHS-compliant assembly. REACH and conflict-minerals status not stated in provided data.
