SN74AHC08RGYR - Quad 2-Input AND Gate, 14-VQFN | Texas Instruments
부품 번호: SN74AHC08RGYR ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0.55 | $0.55 |
| 10 | $0.48 | $4.80 |
| 100 | $0.34 | $34.00 |
| 500 | $0.25 | $125.00 |
| 1,000 | $0.18 | $180.00 |
| 3,000 | $0.14 | $420.00 |
SN74AHC08RGYR 개요
An AND gate is a fundamental combinational logic primitive that produces a logic-high output only when all of its inputs are logic-high; in CMOS families it is built from a pull-up PMOS network in series with a pull-down NMOS network. Within the broader hierarchy, the AND gate belongs to logic gates -> combinational logic -> standard logic ICs -> integrated circuits. The AHC family sits between the slower HC (CMOS) and the lower-power AUC family, optimized for balanced speed and low static power dissipation in mixed 3.3 V / 5 V systems.
Key features include ±8 mA output drive at 5 V, low static power consumption with ICC typically below 20 µA, and 5 V-tolerant inputs that allow safe interfacing with 3.3 V logic rails. The device offers robust ESD protection exceeding 2000-V HBM (JESD22-A114), 200-V MM, and 1000-V CDM models, plus latch-up immunity exceeding 250 mA per JESD 17. Schmitt-trigger action at the inputs ensures clean switching on slowly rising signals.
Typical applications include industrial control signal gating, bus interfacing, power-up sequencing logic, address decoding, and general-purpose glue logic in microcontroller-based designs. The wide 2 V to 5.5 V supply range and balanced speed/power profile make it ideal for portable battery-powered equipment as well as mains-powered industrial controllers.
When designing with this part, place 0.1 µF decoupling capacitors close to the VCC pin and tie unused inputs to VCC or GND to avoid floating inputs and undefined output states per TI application-note guidance. The exposed thermal pad should be soldered to a copper pour for improved mechanical reliability and thermal performance.
드롭인 대체품: SN74AHC08RGYR — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
SN74AHC08RKSR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
SN74AHC08RGYR-Q1
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
SN74AHC08PW
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
74AHC08BQ-Q100X
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MC74AHC08D
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
SN74AHC08RGYR 최대 정격 & 전기적 특성
| Logic Type | AND Gate |
| Number of Gates | 4 |
| Number of Inputs per Gate | 2 |
| Logic Family | AHC (Advanced High-speed CMOS) |
| Supply Voltage (VCC) | 2 V to 5.5 V |
| Propagation Delay (tpd) | 9 ns typical at 5 V |
| Output Drive (IOH/IOL) | ±8 mA at 5 V |
| Input Voltage Tolerance | 0 V to 5.5 V (5 V tolerant) |
| 동작 온도 | -40 °C to +85 °C |
| Package Type | VQFN-14 (RGY) 3.5 x 3.5 mm with thermal pad |
| 실장 유형 | Surface Mount |
| ESD Protection (HBM) | > 2000 V (JESD22-A114) |
| ESD Protection (CDM) | > 1000 V (JESD22-C101) |
| Latch-up Performance | > 250 mA per JESD 17 |
| Lead-Free / RoHS | Yes (compliant) |
SN74AHC08RGYR 핀 구성
| 핀 1 | 1A — Gate 1 input A |
| 핀 2 | 1B — Gate 1 input B |
| 핀 3 | 1Y — Gate 1 output (1A AND 1B) |
| 핀 4 | 2A — Gate 2 input A |
| 핀 5 | 2B — Gate 2 input B |
| 핀 6 | 2Y — Gate 2 output (2A AND 2B) |
| 핀 7 | GND — Ground reference |
| 핀 8 | 3Y — Gate 3 output (3A AND 3B) |
| 핀 9 | 3A — Gate 3 input A |
| 핀 10 | 3B — Gate 3 input B |
| 핀 11 | 4Y — Gate 4 output (4A AND 4B) |
| 핀 12 | 4A — Gate 4 input A |
| 핀 13 | 4B — Gate 4 input B |
| 핀 14 | VCC — Supply voltage (2 V to 5.5 V) |
일반적인 애플리케이션
SN74AHC08RGYR 적합 용도: 6 애플리케이션s: Address-Decoding Glue Logic, Power-Up Sequencing Control, Industrial Control Signal Gating, Portable / Battery-Powered Devices, Bus Interface and Clock Gating, LED Status Indicator Logic.
Address-Decoding Glue Logic
The SN74AHC08RGYR's 9 ns propagation delay at 5 V and ±8 mA output drive make it ideal for address-decoding in 8-bit and 16-bit microcontroller or memory systems. Its Y = A · B AND function combines two address-line enables (for example A15 and a chip-select qualifier) into a single clean active-low chip-select. Placed near the target memory or peripheral with a 0.1 µF VCC decoupling cap, it provides <10 ns enable-to-output latency - far faster than most MCU GPIO toggles. The 2 V to 5.5 V range supports both 3.3 V ARM Cortex-M and 5 V 8051 designs without level shifters.
추천
Power-Up Sequencing Control
Multiple SN74AHC08RGYR gates can be cascaded to form multi-stage power-up sequencers that delay subsequent rails until prior rails reach valid thresholds. The wide 2 V to 5.5 V supply allows the AHC08 to operate directly from early-rail voltages, while ±8 mA drive sinks PG (power-good) signals cleanly into supervisory ICs. Compared to a discrete BJT+MOSFET sequencer, the AND-gate approach saves PCB area and eliminates timing drift with temperature. Per the TI datasheet, unused inputs must be tied high or low to prevent floating; this design respects that constraint.
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Industrial Control Signal Gating
Industrial PLCs, motor drivers, and 24 V-tolerant I/O systems benefit from the SN74AHC08RGYR's robust ESD rating (>2000 V HBM) and latch-up immunity (>250 mA). Each AND gate can mask or qualify an interrupt or fault signal, ensuring that an actuator enables only when both controller OK AND manual-OK are true - a safety-critical combinational check. The -40 °C to +85 °C operating range covers IEC 60068 industrial environments, and the small VQFN-14 3.5 x 3.5 mm footprint fits in dense DIN-rail-mounted controller PCBs.
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Portable / Battery-Powered Devices
The SN74AHC08RGYR's low static current (typically sub-µA in CMOS AHC family) and 2 V minimum supply make it suitable for battery-powered wearables and IoT nodes running from a single Li-ion cell. Its 9 ns propagation delay is sufficient for sensor-fusion logic, button-press arbitration, and low-speed bus qualification without waking the main MCU. The VQFN-14 (RGY) 3.5 x 3.5 mm package occupies ~12 mm² of PCB area, freeing space for antennas and batteries in compact form factors.
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Bus Interface and Clock Gating
Gating an SPI or I2C clock with an SN74AHC08RGYR allows peripherals to be selectively isolated from a shared clock line, reducing EMI and bus contention in multi-master systems. The 5 V-tolerant inputs accept 3.3 V GPIO signals without level shifting, while the ±8 mA output drive cleanly terminates the bus at its source end. Compared to discrete BJT-based gating, the AND gate approach introduces <10 ns skew and no shoot-through current, preserving bus timing margins for 10 MHz+ SPI peripherals.
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LED Status Indicator Logic
Each SN74AHC08RGYR gate can combine two status flags (for example, a power-good and a fault flag) into a single LED driver signal. The ±8 mA output drive directly sinks 5-10 mA LEDs without an external driver transistor in most cases, eliminating a discrete component and saving ~30 mm² of PCB area. The 2 V to 5.5 V VCC supports both 3.3 V and 5 V logic rails, allowing the same part to be used across different board revisions. Per TI's datasheet, the exposed thermal pad improves current-handling under sustained LED drive.
추천
추천 제품 요약
엔지니어링 참조 데이터: SN74AHC08RGYR — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | SN74AHC08RKSR | SN74AHC08RGYR-Q1 | 74AHC08BQ-Q100X | MC74AHC08D |
|---|---|---|---|---|---|
| Package | VQFN-14 (RGY) 3.5x3.5 mm | VQFN-14 (RGY) | VQFN-14 (RGY) | VQFN-14 (DHVQFN14) | VQFN-14 (DHVQFN14) cross-compatible |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Nexperia | Nexperia |
| Logic Function | Quad 2-input AND | Quad 2-input AND | Quad 2-input AND | Quad 2-input AND | Quad 2-input AND |
| VCC Operating Range | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V | 2 V to 5.5 V |
| Propagation Delay (typ @ 5 V) | 9 ns | 9 ns | 9 ns | 9 ns | 9 ns |
| Output Drive (IOH/IOL) | ±8 mA | ±8 mA | ±8 mA | ±8 mA | ±8 mA |
| Automotive Grade (AEC-Q100) | No | No | Yes (AEC-Q100) | Yes (AEC-Q100, -Q100 suffix) | No |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +125 °C (Q1) | -40 °C to +125 °C | -40 °C to +125 °C |
주요 차별점
- VQFN-14 3.5x3.5 mm footprint with exposed thermal pad (vs SN74AHC08PW (TSSOP-14))
- AEC-Q100 automotive grade availability in same footprint (vs SN74AHC08RGYR-Q1)
- 9 ns propagation delay with 5 V tolerance (vs SN74LVC08)
설계 노트
Decouple VCC with a 0.1 µF X7R ceramic capacitor placed within 5 mm of pin 14, plus a bulk 1 µF to 10 µF capacitor to handle switching transients. Per the TI SNx4AHC08 datasheet, AHC devices draw small quiescent currents at DC but exhibit brief supply-current spikes during output transitions; bulk capacitance prevents these spikes from disturbing sensitive analog rails nearby. Tie unused inputs to VCC or GND - never leave them floating - because floating CMOS inputs can drift to mid-supply and cause shoot-through current plus undefined outputs.
Solder the exposed thermal pad to a copper pour on the top or bottom layer, stitched with thermal vias to a ground plane. The thermal pad is electrically tied to the die substrate and should be connected to GND to minimize EMI. For 50 Ω controlled-impedance lines through the AHC08, keep traces short (<25 mm) and avoid 90° bends. The VQFN-14 (RGY) 3.5 x 3.5 mm footprint allows the part to sit directly adjacent to a 0.65 mm-pitch SOIC device on a shared power rail.
Estimated: At 5 V VCC and 8 mA DC output drive, a single AHC08 gate dissipates approximately 40 mW during a sustained LED-drive application; four gates simultaneously driving 8 mA each dissipate 160 mW. The VQFN-14 (RGY) package with thermal pad has a theta_JA around 50 °C/W on a typical JEDEC 4-layer board, yielding an 8 °C junction temperature rise above ambient - well within the 125 °C absolute maximum but worth verifying with a thermocouple measurement in enclosed enclosures.
The 9 ns propagation delay at 5 V is fast enough for clock frequencies up to ~50 MHz when used for clock gating, but slower outputs (>100 pF capacitive load) may degrade timing margin. Add a series damping resistor (22-33 Ω) near the AHC08 output when driving long traces or multiple loads to control ringing. The 5 V input tolerance simplifies 3.3 V-to-5 V level shifting without external components - per TI's datasheet, inputs accept 0 V to 5.5 V regardless of VCC value.
규정 준수 정보
RoHS and lead-free compliant per TI product page. Standard part is not AEC-Q100 - use SN74AHC08RGYR-Q1 for automotive. ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101.
