SN74AVC4T245QWRGYRQ1 - 4-Bit Dual-Supply Level Shifter AEC-Q100 | TI
MPN: SN74AVC4T245QWRGYRQ1 ✓ Hoạt độngSN74AVC4T245QWRGYRQ1 Tóm tắt
A bus transceiver is a digital interface IC that combines transmit and receive paths in one device, allowing bidirectional data flow between two buses. The SN74AVC4T245-Q1 belongs to the voltage-level translator family, a subset of interface ICs within the broader integrated circuits category. Level translation is essential when connecting components with different I/O voltages, such as a 1.8 V microcontroller interfacing with a 3.3 V peripheral.
Key features include dual-supply operation with VCCA and VCCB each accepting 1.2 V to 3.6 V, tri-state outputs for bus isolation, and Ioff partial-power-down protection that disables outputs and prevents damaging backflow current when either supply is removed. A typical propagation delay of 2.1 ns and data rates up to 380 Mbps make the device suitable for SPI, I2C, UART, and parallel GPIO interfaces.
The CMOS architecture supports use as two independent 2-bit transceivers or one 4-bit transceiver. Direction control (1DIR, 2DIR) and output-enable (1OE, 2OE) pins are referenced to VCCA, simplifying control-logic design in mixed-voltage systems. The device operates asynchronously, requiring no clock signal, and is fully specified over the -40C to +125C automotive temperature range.
Typical applications include automotive body control modules, ADAS ECUs, infotainment systems, and industrial automation. In ECUs, it bridges 1.8 V or 2.5 V MCUs to 3.3 V sensors, CAN transceiver interfaces, SPI flash, and general-purpose GPIO level shifting. Site-available companions include the SN65HVD230QDRQ1 CAN transceiver and SN74LVC1T45QDCKRQ1 single-bit translator.
Design tip: decouple VCCA and VCCB with 0.1 uF capacitors placed close to the pins, and ensure DIR/OE signals (VCCA domain) are stable before data transmission to avoid bus contention.
Bộ thay thế dễ dàng lắp đặt cho SN74AVC4T245QWRGYRQ1 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với SN74AVC4T245QWRGYRQ1 (cùng hình factor và footprint) — khác nhau ở Direction Control, Output Type.
SN74AVC4T245RGYR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SN74AVC4T245QWRGYRQ1 Tỷ lệ tối đa & tính chất điện
| Chức năng | 4-bit dual-supply bus transceiver with configurable voltage translation |
| Supply Voltage VCCA | 1.2 V to 3.6 V |
| Supply Voltage VCCB | 1.2 V to 3.6 V |
| Number of Bits | 4 (configurable as two 2-bit transceivers) |
| Kiểu đầu ra | 3-State |
| Propagation Delay | 2.1 ns typical |
| Tốc độ dữ liệu | Up to 380 Mbps |
| Direction Control | 1DIR, 2DIR (VCCA referenced) |
| Output Enable | 1OE, 2OE (VCCA referenced) |
| Ioff Partial-Power-Down | Yes |
| Nhiệt độ hoạt động | -40C to +125C (AEC-Q100 Grade 1) |
| Hộp | VQFN-16 (RGY) 4x3.5 mm |
| Kiểu lắp đặt | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified |
| Trạng thái RoHS | Compliant |
| Technology Family | AVC (Advanced Very-low-voltage CMOS) |
Cấu hình chân SN74AVC4T245QWRGYRQ1
| Chân 1 | 1OE — Output enable for 1A/1B ports (VCCA referenced, active low) |
| Chân 2 | 1DIR — Direction control for 1A/1B ports (VCCA referenced) |
| Chân 3 | VCCA — A-side power supply (1.2 V to 3.6 V) |
| Chân 4 | GND — Ground |
| Chân 5 | 1A1 — A-side data 1 |
| Chân 6 | 1A2 — A-side data 2 |
| Chân 7 | 2A1 — A-side data 3 |
| Chân 8 | 2A2 — A-side data 4 |
| Chân 9 | 2B2 — B-side data 4 |
| Chân 10 | 2B1 — B-side data 3 |
| Chân 11 | 1B2 — B-side data 2 |
| Chân 12 | 1B1 — B-side data 1 |
| Chân 13 | VCCB — B-side power supply (1.2 V to 3.6 V) |
| Chân 14 | 2DIR — Direction control for 2A/2B ports (VCCA referenced) |
| Chân 15 | 2OE — Output enable for 2A/2B ports (VCCA referenced, active low) |
| Chân 16 | GND — Ground / thermal pad |
Ứng dụng tiêu biểu
SN74AVC4T245QWRGYRQ1 phù hợp cho 6 Áp dụngs: Automotive Body Control Modules, ADAS ECUs and Sensor Interfaces, Automotive Infotainment Systems, Industrial Automation and PLC I/O, Microcontroller GPIO Level Shifting, SPI Flash and Memory Interface Translation.
Automotive Body Control Modules
In body control modules (BCMs), the SN74AVC4T245QWRGYRQ1 bridges the low-voltage MCU domain (typically 1.8 V or 2.5 V) to 3.3 V peripheral buses controlling lighting, door, and seat functions. Its AEC-Q100 Grade 1 rating (-40C to +125C) survives under-hood-adjacent thermal environments, while the 2.1 ns propagation delay and 380 Mbps capability support fast GPIO and parallel status buses. The Ioff partial-power-down feature prevents backfeed during BCM sleep states, keeping quiescent drain low.
Được đề xuất
ADAS ECUs and Sensor Interfaces
ADAS electronic control units frequently mix 1.8 V processors with 3.3 V radar, camera, and CAN interfaces. The SN74AVC4T245QWRGYRQ1 translates these buses with 380 Mbps headroom, sufficient for SPI sensor control at 50 MHz and above. Configurable operation as two independent 2-bit transceivers lets designers split SPI (data/control) from general GPIO within one package. Tri-state outputs with VCCA-referenced OE enable safe bus isolation during sensor resets, and Ioff protection handles asymmetric power-up sequencing common in ADAS domains.
Được đề xuất
Automotive Infotainment Systems
Infotainment head units combine application processors running at 1.8 V I/O with 3.3 V audio codecs, tuners, and display interfaces. The SN74AVC4T245QWRGYRQ1 provides four bidirectional translation channels at up to 380 Mbps with only 2.1 ns typical delay, preserving timing margins on I2S control and fast parallel command buses. Dual-supply architecture (VCCA/VCCB from 1.2 V to 3.6 V) allows any-to-any voltage pairing, and the RGY VQFN-16 footprint of 4x3.5 mm conserves board space behind the display stack.
Được đề xuất
Industrial Automation and PLC I/O
In industrial PLCs and automation controllers, 3.3 V or 2.5 V microcontrollers must drive 3.3 V field-side logic and communication modules. The SN74AVC4T245QWRGYRQ1 handles this with its wide 1.2-3.6 V dual-supply range and robust tri-state outputs for shared backplane buses. The 380 Mbps data rate supports fast SPI links to ADCs and industrial Ethernet companion ICs, while direction control per 2-bit half lets one device serve both command and feedback buses. Industrial temperatures align with the -40C to +125C AEC-Q100 Grade 1 rating.
Được đề xuất
Microcontroller GPIO Level Shifting
General-purpose mixed-voltage MCU designs - from MSP430 (2.5 V) to 3.3 V peripherals - use the SN74AVC4T245QWRGYRQ1 for clean bidirectional GPIO translation. Unlike pass-switch solutions, its CMOS push-pull outputs maintain logic levels without external pull-ups, and the 2.1 ns delay adds negligible timing overhead. The VCCA-referenced DIR/OE pins simplify control since the controller side typically sets direction. Ioff protection ensures safe behavior when either rail collapses during reset, brownout, or programming sequences.
Được đề xuất
SPI Flash and Memory Interface Translation
Connecting 1.8 V processors to 3.3 V SPI flash memories requires translating SCLK, MOSI, MISO, and CS - exactly four signals matched by the SN74AVC4T245QWRGYRQ1's 4-bit width. With 380 Mbps capability, it sustains QSPI clock rates well above 80 MHz typical for fast flash reads. Splitting into two 2-bit halves allows independent direction control of command/address lines versus data lines. The 2.1 ns propagation delay keeps round-trip timing within SPI setup budgets even at elevated clock rates.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SN74AVC4T245QWRGYRQ1 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | SN74AVC4T245RGYR | SN74AVC4T245QPWRQ1 | 74AVC4T245 (Nexperia) |
|---|---|---|---|---|
| Package | VQFN-16 (RGY) 4x3.5 mm | VQFN-16 (RGY) - same | TSSOP-16 (PW) - different | TSSOP-16 / DHVQFN-16 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Nexperia |
| Automotive Grade | Yes (AEC-Q100) | No | Yes (AEC-Q100) | No |
| Number of Bits | 4-bit | 4-bit | 4-bit | 4-bit |
| Supply Voltage Range | 1.2 V to 3.6 V (both supplies) | 1.2 V to 3.6 V | 1.2 V to 3.6 V | 1.2 V to 3.6 V |
| Output Type | 3-State | 3-State | 3-State | 3-State |
| Ioff Partial-Power-Down | Yes | Yes | Yes | Yes |
| Packaging Option | Tape & Reel (RGYRQ1) | Tape & Reel | Tape & Reel | Tape & Reel |
Bảo phân biệt quan trọng
- AEC-Q100 automotive qualification in VQFN-16 (vsSN74AVC4T245RGYR)
- Compact 4x3.5 mm VQFN-16 footprint (vsSN74AVC4T245QPWRQ1)
- Configurable as two independent 2-bit transceivers (vs74AVC4T245 (Nexperia))
Ghi chú thiết kế
Decouple VCCA and VCCB each with a 0.1 uF ceramic capacitor placed within 2 mm of the respective pins, connected to a solid ground plane. The VQFN-16 RGY package has a small exposed thermal pad - solder it to a ground pad array for both thermal relief and signal integrity. Since this is a dual-supply device, ensure both supply rails are present before enabling outputs, or rely on the Ioff feature during sequencing.
The DIR and OE control pins are referenced to VCCA, not VCCB - driving them from a VCCB-domain controller can violate input logic thresholds and cause bus contention. Always guarantee DIR is stable before data transitions, and use the OE pin (active low) to tri-state outputs during power-up, reset, or MCU reprogramming. Never leave OE floating; pull it up to VCCA if unused.
At data rates approaching 380 Mbps, keep A-side and B-side traces short (<50 mm) with controlled impedance where possible. Series termination of 22-33 ohm on B-side outputs reduces reflections on longer bus runs. Avoid routing translated signals adjacent to switching regulator nodes; the push-pull CMOS outputs are fast-edge devices (AVC family) and coupling into high-impedance neighboring traces can cause crosstalk glitches.
Do not exceed 3.6 V on either VCCA or VCCB - the absolute maximum is slightly higher but reliability degrades. When translating between rails derived from different regulators, account for sequenced power-up: if only one supply is present, Ioff circuitry holds outputs disabled and prevents backflow, but sustained operation in this state should be avoided in high-availability automotive systems.
Thông tin tuân thủ
AEC-Q100 qualified per TI product page (Q suffix). RoHS compliant per TI product data. REACH and halogen-free status not stated in provided data.
