01 · Device purpose
Product Overview and Selection Scope
SN74LVC1G32 integrates one 2-input positive-logic OR gate with a push-pull output.
- Wide supply range: operation from 1.65 V to 5.5 V.
- Positive-OR logic: either input can drive Y HIGH; both inputs must be LOW for Y to be LOW.
- Input range up to 5.5 V: A and B are specified from 0 V to 5.5 V.
- Output drive: ±24 mA at VCC = 3.0 V under the specified DC test conditions.
- Low static supply current: 0.1 µA typical ICC at +25 °C.
- Partial-power-down support: Ioff limits current flow through the device when VCC = 0 V.
Selection boundary: This device is a positive-logic OR gate with an actively driven output. It is not an XOR gate, open-drain output, three-state bus driver, or analog signal combiner.
02 · Logic and pins
OR Function, Truth Table and Pin Assignment
Y is HIGH when A, B or both inputs are HIGH. Y is LOW only when both A and B are LOW.
| Pin | Name | Type | Function | Engineering note |
|---|---|---|---|---|
| 1 | A | Input | OR input A | Do not leave floating. |
| 2 | B | Input | OR input B | Do not leave floating. |
| 3 | GND | Power | Ground | Use a short local return path. |
| 4 | Y | Output | Push-pull OR output | Check output loading and receiver thresholds. |
| 5 | VCC | Power | Supply | Place local bypass capacitance close to pins 5 and 3. |
03 · Orderable options
Ordering Codes and Package Selection
| Ordering number | Temperature range | Package | Top marking | MSL | Packing |
|---|---|---|---|---|---|
| SN74LVC1G32DCKR | -40 °C to +125 °C | SC70-5 / SOT353 equivalent | CG5 | MSL 3 | Tape and reel, 3,000 units |
| SN74LVC1G32DBVR | -40 °C to +125 °C | SOT23-5 | C32R | MSL 3 | Tape and reel, 3,000 units |
Additional lot, date, vendor, logo or environmental markings may appear. Confirm the complete ordering code and package drawing during receiving inspection.
04 · Design envelope
Recommended Operating Conditions and Absolute Limits
| Parameter | Condition | Minimum | Maximum | Unit |
|---|---|---|---|---|
| Supply voltage, VCC | Operating | 1.65 | 5.5 | V |
| Supply voltage, VCC | Data retention only | 1.5 | 5.5 | V |
| Input voltage, VI | Operating | 0 | 5.5 | V |
| Output voltage, VO | Operating | 0 | VCC | V |
| Input transition, tr / tf | 1.8 V / 2.5 V supplies | - | 20 | ns/V |
| Input transition, tr / tf | 3.3 V / 5.0 V supplies | - | 10 / 5 | ns/V |
| Ambient temperature, TA | Operating | -40 | 125 | °C |
Input logic thresholds
| VCC range | VIH minimum | VIL maximum | Unit |
|---|---|---|---|
| 1.65 V to 1.95 V | 0.65 × VCC | 0.15 × VCC | V |
| 2.3 V to 2.7 V | 1.7 | 0.3 | V |
| 3.0 V to 3.6 V | 2.2 | 0.4 | V |
| 4.5 V to 5.5 V | 0.7 × VCC | 0.15 × VCC | V |
Absolute maximum and handling limits
| Parameter | Minimum | Maximum | Unit |
|---|---|---|---|
| Supply voltage, VCC | -0.5 | 6.5 | V |
| Input voltage, VI | -0.5 | 6.5 | V |
| Output voltage, high-impedance or power-off | -0.5 | 6.5 | V |
| Output voltage, HIGH or LOW state | -0.5 | VCC + 0.5 | V |
| Continuous output current | ±50 | mA | |
| Continuous VCC or GND current | ±100 | mA | |
| Maximum junction temperature | Not applicable | 150 | °C |
| Storage temperature | -65 | 150 | °C |
05 · Static performance
Output Levels, Leakage and Supply Current
| Parameter | Test condition | VCC | Limit or typical value | Unit |
|---|---|---|---|---|
| VOH | IOH = -100 µA | 1.65 V to 5.5 V | Minimum VCC - 0.1 V | V |
| VOH | IOH = -4 / -8 / -16 / -24 / -32 mA | 1.65 / 2.3 / 3.0 / 3.0 / 4.5 V | Minimum 1.2 / 1.9 / 2.4 / 2.3 / 3.8 V | V |
| VOL | IOL = 100 µA | 1.65 V to 5.5 V | Maximum 0.1 V | V |
| VOL | IOL = 4 / 8 / 16 / 24 / 32 mA | 1.65 / 2.3 / 3.0 / 3.0 / 4.5 V | Maximum 0.45 / 0.30 / 0.40 / 0.55 / 0.55 V | V |
| II | A or B at 5.5 V or GND | 0 V to 5.5 V | ±0.1 µA typical; ±5 µA maximum full range | µA |
| Ioff | VI or VO = 5.5 V | 0 V | ±0.1 µA typical; ±10 µA maximum full range | µA |
| ICC | VI = 5.5 V or GND, IO = 0 | 1.65 V to 5.5 V | 0.1 µA typical; 10 µA maximum full range | µA |
| ΔICC | One input at VCC - 0.6 V | 3 V to 5.5 V | 500 µA maximum | µA |
06 · Dynamic performance
Propagation Delay and Dynamic Capacitance
| Parameter | 1.8 V | 2.5 V | 3.3 V | 5.0 V | Condition / unit |
|---|---|---|---|---|---|
| Propagation delay, tpd | 8.0 | 3.7 | 2.5 | 2.7 | Typical ns; CL = 30 pF or 50 pF, full temperature range |
| Input capacitance, Ci | 4 pF | Typical at VCC = 3.3 V | |||
| Power-dissipation capacitance, Cpd | 20 | 21 | 22 | 25 | Typical pF at 10 MHz, +25 °C |
Timing interpretation: The listed propagation delays are typical characterization values, not guaranteed worst-case limits. Validate the receiver threshold, PCB capacitance, supply tolerance, and operating-temperature range.
07 · Implementation
Input Control, Output Loading and PCB Guidance
- Do not leave inputs floating: hold A and B at defined logic levels.
- Observe transition-rate limits: keep input rise and fall rates within the specified ns/V limits for the selected supply.
- Avoid output contention: Y actively drives HIGH and LOW; do not connect competing push-pull outputs.
- Budget fan-out: check VOH, VOL, output current and cumulative receiver capacitance.
- Use Ioff correctly: partial-power-down support reduces backflow through the output, but board-level back-power paths still require validation.
- Bypass locally: place a 0.1 µF capacitor close to VCC and GND.
System check: Validate input thresholds, input transition rate, propagation delay, output loading, power sequencing, ESD protection, and signal integrity across the full production operating range.
08 · Mechanical
SOT23-5 and SC70-5 Packages, Land Patterns and Packing
The two packages share the same logical pin assignment but have different body dimensions, lead pitch, marking and thermal impedance. Do not share one PCB footprint between them.
| Dimension | SOT23-5 | SC70-5 | Unit |
|---|---|---|---|
| Overall height A | 1.050 to 1.250 | 0.900 to 1.100 | mm |
| Body length D | 2.820 to 3.020 | 2.000 to 2.200 | mm |
| Body width E | 1.500 to 1.700 | 1.150 to 1.350 | mm |
| Overall lead span E1 | 2.650 to 2.950 | 2.150 to 2.450 | mm |
| Lead pitch e | 0.950 BSC | 0.650 BSC | mm |
| Outer lead pitch e1 | 1.800 to 2.000 | 1.300 BSC | mm |
| Lead width b | 0.300 to 0.500 | 0.150 to 0.350 | mm |
| Lead length L | 0.300 to 0.600 | 0.260 to 0.460 | mm |
09 · Use contexts
Application Guidance and Design Limitations
The supplied specification lists the following application areas. These are use contexts, not end-product approvals or safety certifications.
AV ReceiversCombine active-HIGH control conditions in audio-video hardware.
Blu-ray and Home TheaterImplement compact board-level enable and status logic.
Digital Picture FramesCombine local control or wake conditions in compact display products.
Data AcquisitionCombine valid, trigger or enable signals after timing validation.
GPS NavigationImplement control logic in portable navigation equipment.
Portable Media PlayersCombine low-voltage control states in battery-powered media hardware.10 · Engineering answers
SN74LVC1G32 Engineering FAQs
What function does SN74LVC1G32 implement?
It performs Y = A OR B. The output is HIGH when either input is HIGH and LOW only when both inputs are LOW.
Is this an XOR gate?
No. When both A and B are HIGH, the OR output Y remains HIGH.
What supply range is recommended?
VCC is specified from 1.65 V to 5.5 V for operation.
Can inputs accept 5.5 V when VCC is lower or off?
The recommended input range is 0 V to 5.5 V, and Ioff is specified for partial power-down. Validate all board-level back-power paths.
What is the propagation delay?
The PDF lists typical propagation delays of 8.0 ns at 1.8 V, 3.7 ns at 2.5 V, 2.5 ns at 3.3 V, and 2.7 ns at 5.0 V under the stated load conditions. The specification does not provide guaranteed maximum propagation-delay limits.
Can the output be wire-OR connected?
No. Y is a push-pull output. Do not connect it directly against another actively driven output.
Which packages are listed?
SN74LVC1G32DBVR is SOT23-5 with C32R marking. SN74LVC1G32DCKR is SC70-5 with CG5 marking. Both are MSL 3 and tape-and-reel packed in quantities of 3,000.
Can an input be left open?
No. Every unused input must be held at VCC or GND.
This page summarizes the supplied SN74LVC1G32 Rev A.1 product specification for component evaluation. Confirm the current controlled specification, ordering code, marking, pin assignment, electrical limits, package tolerances and qualification requirements before production release.
