NVT4858HKZ - SD/SDIO Level Translator 104Mbps | NXP
部品番号: NVT4858HKZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.6113 | $0.61 |
| 10 | $0.56 | $5.60 |
| 100 | $0.49 | $49.00 |
| 500 | $0.44 | $220.00 |
| 1,000 | $0.4 | $400.00 |
NVT4858HKZ 概要
A voltage level translator is a logic IC that safely interfaces digital signals between circuit domains operating at different supply voltages. In the memory-card hierarchy, the level translator sits between a host processor or MCU and the SD/SDIO/microSD/SIM card slot, converting logic thresholds so that a 1.08 V to 1.98 V host controller can communicate with a card running at 1.62 V to 3.6 V. Without translation, over-voltage on a low-voltage host IO would violate absolute maximum ratings and damage the SoC.
Key features include full SD 3.0 SDR104 compliance at 104 Mbps, automatic direction control that removes the need for a direction pin, six bidirectional channels covering the CLK, CMD and DAT[0:3] card signals, and built-in EMI filtering that reduces radiated emissions on the card interface. On-chip ESD protection hardens the card pins against electrostatic discharge events encountered during card insertion and removal.
Architecturally, the NVT4858 uses a dual-rail pass-gate translation core with auto-direction sensing on each channel, so the translator detects whether the host or the card is driving and mirrors the level accordingly. This is essential for open-drain phases of the SD protocol where the bus direction reverses dynamically within a transaction.
Typical applications are microSD and SD card slots in smartphones, tablets, automotive infotainment head units, embedded Linux boards and IoT gateways, plus SIM card interfaces in cellular modems.
Design consideration: the HKZ variant has no internal LDO, so the card-side supply must be generated externally with a clean, current-limited rail to preserve signal integrity at SDR104 speeds.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: NVT4858HKZ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
NVT4857HKZ
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
NVT4858HKZ 最大定格＆電気的特性
| 機能 | Bidirectional voltage level translator |
| Protocol Compliance | SD 3.0 / SDIO, SDR104 |
| Number of Channels | 6 |
| データレート | 104 Mbps |
| Host-Side Supply Voltage | 1.08 V to 1.98 V |
| Card-Side Supply Voltage | 1.62 V to 3.6 V |
| Direction Control | Automatic (auto-direction) |
| EMI Filter | Integrated |
| ESD Protection | Integrated on card-side pins |
| Integrated LDO | No (HKZ = without LDO) |
| パッケージ | 16-XQFN (1.8 x 2.6 mm) |
| 実装タイプ | Surface Mount |
| ライフサイクル状態 | Active |
NVT4858HKZ 16-xqfn (1.8 x 2.6 mm) ピン配置ガイド
NVT4858HKZ (16-xqfn (1.8 x 2.6 mm) パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: NVT4858HKZ.
詳細は データシート をご参照ください。
主な用途
NVT4858HKZ の用途: 6 件s: Smartphone and Tablet microSD Slots, Automotive Infotainment Head Units, Embedded Linux Single-Board Computers, SIM Card Interfaces in Cellular Modems, IoT Gateways and Data Loggers, Test and Measurement Instrument Card Slots.
Smartphone and Tablet microSD Slots
The NVT4858HKZ fits smartphone and tablet microSD slots because application processors increasingly run their SDIO controllers at 1.8 V or below, while UHS-I microSD cards use 1.8 V signaling initiated from a 3.3 V default state. Its dual-supply translation (host 1.08 V to 1.98 V, card 1.62 V to 3.6 V) with auto-direction control handles the SD protocol's dynamic bus turnaround without a direction pin, and its 104 Mbps SDR104 rating matches UHS-I top speed. The integrated EMI filter and ESD protection reduce component count in the constrained area near the card cage. Placed between the SoC SDIO pins and the microSD connector, it protects the low-voltage SoC IOs from card-side voltage excursions while preserving signal integrity at SDR104 clock rates.
おすすめ
Automotive Infotainment Head Units
Automotive infotainment and cluster systems use SD and microSD slots for map data and media, typically hosted by an NXP i.MX or SPC5-class processor. The NVT4858HKZ bridges the low-voltage host SDIO domain to the card side, while its integrated EMI filter helps the design pass CISPR-class radiated emissions testing on the card interface, which sits close to the vehicle antenna modules. The 104 Mbps SDR104 capability supports fast map reads and media streaming, and on-chip ESD protection hardens the exposed card pins against insertion discharge events. The compact 16-XQFN 1.8 x 2.6 mm package suits dense head-unit layouts; verify AEC-Q100 qualification status for this ordering code if the program requires it.
おすすめ
Embedded Linux Single-Board Computers
Embedded Linux boards (gateways, HMI panels, industrial controllers) frequently pair a 1.8 V-capable SDHC/SDIO host controller with a standard microSD socket. The NVT4858HKZ translates the host 1.08 V to 1.98 V rails to the card's 1.62 V to 3.6 V domain with auto direction, so no GPIO-controlled direction signal or firmware management is needed across the SD initialization sequence. At 104 Mbps it does not throttle SDR104-class cards, keeping root-filesystem and logging I/O fast. The integrated EMI filter and ESD protection remove the need for discrete PI-filters and TVS arrays on six lines, saving board area. Because the HKZ variant lacks an LDO, add an external current-limited card supply switch.
おすすめ
SIM Card Interfaces in Cellular Modems
Cellular modems and telematics units interface SIM cards whose signaling convention historically ran at 1.8 V or 3 V classes, while modern baseband IO domains drop to 1.2 V to 1.8 V. The NVT4858HKZ supports SIM card level translation within its 1.62 V to 3.6 V card-side range and 1.08 V to 1.98 V host-side range, with auto direction handling the half-duplex SIM protocol. The integrated EMI filter reduces clock harmonics that can desensitize nearby RF receivers - a real concern since the SIM connector often sits within centimeters of the cellular antenna. On-chip ESD protection guards the user-accessible SIM contacts. The 1.8 x 2.6 mm XQFN fits the crowded layout around the baseband chipset.
おすすめ
IoT Gateways and Data Loggers
IoT gateways and industrial data loggers store local telemetry on removable microSD media. The NVT4858HKZ allows a low-voltage MCU SDIO interface (1.08 V to 1.98 V) to drive commodity 3.3 V microSD cards reliably, with six channels covering CLK, CMD and DAT0-3. Its 104 Mbps SDR104 headroom is far above the throughput most logging applications need, giving margin for FAT filesystem bursts. The integrated EMI filter and ESD protection improve robustness in field conditions where cards are swapped by technicians, clamping human-body discharges at the connector. The auto-direction control eliminates firmware direction toggling across card initialization states, simplifying bare-metal driver development. Use an external load switch for the card supply since the HKZ version omits the LDO.
おすすめ
Test and Measurement Instrument Card Slots
Bench instruments, data acquisition units and medical diagnostic devices use SD or microSD slots to export waveforms and logs. The NVT4858HKZ provides a clean way to connect a modern low-voltage instrument processor to the card interface without level mismatch, and its integrated EMI filter keeps the card clock harmonics from radiating into the instrument's sensitive analog front end - valuable in precision measurement and medical monitoring contexts. ESD protection on the card pins withstands repeated user card swaps, supporting long service life. With 104 Mbps SDR104 capability, large capture files transfer quickly to removable media. The 16-XQFN 1.8 x 2.6 mm package integrates easily behind the front-panel card slot in dense instrument layouts.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: NVT4858HKZ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | NVT4857HKZ |
|---|---|---|
| Package | 16-XQFN (1.8 x 2.6 mm) | 16-XQFN (1.8 x 2.6 mm) - same footprint family |
| Brand | NXP Semiconductors | NXP Semiconductors |
主な差別化要因
- Full SD 3.0 SDR104 support at 104 Mbps （vs NVT4857HKZ)
- Integrated EMI filter plus ESD protection in one chip （vs Discrete TVS + PI-filter solution)
- Auto-direction control with no DIR pin （vs Direction-controlled translators (e.g., TXS-family parts with DIR/OE pins))
設計ノート
The NVT4858HKZ has no integrated LDO, so the card-side supply (1.62 V to 3.6 V) must be generated externally. Use a current-limited LDO or power-distribution switch on the card rail so that a damaged or shorted card cannot drag down the system power tree. Sequence the card-side rail after the host-side rail (1.08 V to 1.98 V) or ensure both are stable before card detection, and decouple each supply pin with 100 nF ceramic capacitors placed within 2 mm of the pins.
Place the NVT4858HKZ between the host and the card connector, biased close to the connector so that the EMI-filtered, ESD-protected card-side traces are as short as possible. Keep the six translated lines (CLK, CMD, DAT0-3) length-matched where practical and reference them to a solid ground plane. Do not route the card-side traces under the antenna or near switching regulators; the integrated filter attenuates emissions only on traces it actually filters.
Do not exceed the 104 Mbps SDR104 rating with higher-speed signaling modes (such as SDR208-class overclocking), and confirm that the host controller signal swing stays within the 1.08 V to 1.98 V host-side range - applying 3.3 V logic to the host side violates the absolute maximum ratings. Because direction is automatic, no firmware direction control is needed, but avoid adding external bus keepers or pull resistors strong enough to fight the translator's drivers.
コンプライアンス情報
Compliance details were not stated in the provided web data; consult the NXP product page Environmental Quality section for RoHS/REACH status of NVT4858HKZ.
