GTL2014PW - 4-Bit LVTTL-to-GTL Level Translating Transceiver | NXP
部品番号: GTL2014PW ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.31 | $131.00 |
| 500 | $1.12 | $560.00 |
| 1,000 | $0.98 | $980.00 |
GTL2014PW 概要
A level translator (also called a voltage translator or logic-level shifter) is a mixed-signal interface IC that allows digital systems operating at different supply voltages to exchange data without damage or logic errors. Within the interface IC hierarchy, translating transceivers sit alongside bus buffers and line drivers, and GTL (Gunning Transceiver Logic) translation is a specialized sub-class used in processor front-side buses, memory controllers, and backplane interconnects where the bus reference voltage is significantly lower than the system logic supply.
Key features of the GTL2014 include a direction (DIR) pin that selects between GTL-to-LVTTL sampling-receiver mode and LVTTL-to-GTL interface mode, LVTTL inputs that are 5.5 V tolerant for direct connection to TTL or 5 V CMOS outputs, and a VREF pin that tracks down to 0.5 V for low-voltage CPU interfaces. The part is pin-to-pin backward compatible with the GTL2005 (A and B port labels interchanged), simplifying migration of existing layouts.
Technically, the GTL2014 uses open-drain GTL output structures referenced to VREF, with input/output capacitance from B-to-A specified in the range of approximately 3.4 to 4.3 pF, keeping bus loading low for backplane environments. Compared with the GTL2005, the GTL2014 offers improved VREF tracking linearity at low reference voltages (the GTL2005 linearity degrades below 0.8 V), at the cost of slightly longer propagation delays.
Typical applications include processor-to-memory controller GTL bus interfacing, telecom and industrial backplane level translation, and mixed-voltage logic islands in 3.3 V systems that must talk to GTL-class buses.
Design consideration: ensure the GTL bus is properly terminated to VREF through resistors, as GTL is an open-drain terminated bus standard; the LVTTL outputs are not 5.5 V tolerant even though the LVTTL inputs are.
This page synthesizes distributor availability data, verified cross-reference alternatives, and practical design notes not consolidated in the manufacturer datasheet alone.
ドロップイン代替品: GTL2014PW — 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。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: GTL2014PW （同一形状・フットプリント） — 相違点: Direction Control, Function, Number of Channels, Package.
クイック比較ツール — 並列比較する代替部品を選択:
GTL2014PWZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
GTL2005PW
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TXS0104EGXUR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MAX13044EEBC+T
✅ ドロップイン📋 参考代替品（カタログ未掲載）
GTL2014PW 仕様
| 機能 | 4-bit bidirectional LVTTL to GTL translating transceiver |
| Number of Channels | 4 |
| Logic Side A Supply (VCC) | 3.3 V (LVTTL) |
| GTL Bus Reference (VREF) Tracking Range | tracks down to 0.5 V |
| LVTTL Input Tolerance | 5.5 V tolerant (inputs only) |
| LVTTL Output Tolerance | Not 5.5 V tolerant |
| Direction Control | DIR pin (GTL-to-LVTTL receiver or LVTTL-to-GTL interface) |
| Latch | Non-latching transceiver |
| Input/Output Capacitance B-to-A | 3.4 to 4.3 pF |
| Backward Compatibility | Pin-to-pin compatible with GTL2005 (A/B labels interchanged) |
| 動作温度範囲 | -40 C to +85 C |
| パッケージ | TSSOP14 (SOT402-1), 4.4 mm body width |
| 実装タイプ | Surface Mount |
| ECCN | EAR99 |
| Country of Origin | Thailand |
| ハロゲンフリー | Compliant |
| Estimated EOL Date | 2028 |
GTL2014PW tssop14 (sot402-1), 4.4 mm body width ピン配置ガイド
GTL2014PW (tssop14 (sot402-1), 4.4 mm body width パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: GTL2014PW.
詳細は データシート をご参照ください。
主な用途
GTL2014PW の用途: 6 件s: Processor GTL Bus Interfacing, Memory Controller Level Translation, Telecom and Industrial Backplanes, Mixed-Voltage Logic Island Bridging, Instrumentation Signal Interfaces, Legacy Design Maintenance and Migration.
Processor GTL Bus Interfacing
The GTL2014PW was designed specifically to bridge 3.3 V LVTTL system logic to GTL-/GTL/GTL+ processor buses, where the bus reference voltage is far below the logic supply. Its VREF pin tracks linearly down to 0.5 V, matching modern low-voltage CPU interface requirements where the older GTL2005 loses linearity below 0.8 V. In a typical design, the B port connects to the terminated open-drain GTL bus through pull-up resistors to VREF, while the A port connects to 3.3 V LVTTL control logic. The DIR pin selects between GTL-to-LVTTL sampling-receiver mode and LVTTL-to-GTL driver mode. Because the B-to-A I/O capacitance is only 3.4 to 4.3 pF, bus loading stays low enough to preserve signal integrity on multi-drop CPU interconnects.
おすすめ
Memory Controller Level Translation
Memory controllers frequently expose reference-based bus interfaces whose voltage thresholds differ from the host 3.3 V LVTTL logic domain. The GTL2014PW provides a clean 4-bit translation slice for address, data, or control strobes in this role. The non-latching bidirectional architecture means signals pass transparently under DIR control, avoiding extra pipeline latency in timing-critical memory paths. LVTTL inputs are 5.5 V tolerant, allowing direct connection to legacy TTL or 5 V CMOS control outputs without external protection. Designers should keep the GTL-side termination network to VREF close to the GTL2014PW to damp reflections, and must remember the LVTTL outputs are not 5.5 V tolerant. The TSSOP-14 footprint matches GTL2005PW layouts for easy drop-in migration.
おすすめ
Telecom and Industrial Backplanes
Telecom and industrial backplane systems mix logic families and voltage domains across cards plugged into a common chassis. The GTL2014PW suits card-edge or mid-plane translation where a low-voltage referenced bus (GTL-/GTL/GTL+) must coexist with 3.3 V LVTTL slot logic. Operating from -40 C to +85 C, the part covers the ambient range typical of telecom shelves and factory environments. Its halogen-free compliance and EAR99 classification simplify global logistics. Because the GTL bus is open-drain and terminated to VREF through the backplane, the GTL2014PW's low 3.4-4.3 pF port capacitance minimizes stub loading on shared lines. Designers should verify DIR sequencing at power-up so the receiver mode is established before the backplane bus is actively driven.
おすすめ
Mixed-Voltage Logic Island Bridging
Many legacy systems contain isolated islands of GTL-class logic alongside 3.3 V and even 5 V TTL circuitry. The GTL2014PW handles the asymmetric translation needs of these mixed domains: its LVTTL inputs tolerate up to 5.5 V, allowing 5 V TTL or CMOS outputs to drive the translator directly, while the GTL side tracks VREF down to 0.5 V. Four independent bit channels let one TSSOP-14 device serve status, enable, and clock lines in the same footprint. Care is required only on the output direction of the LVTTL port, which is not 5.5 V tolerant. The DIR pin can be driven statically or switched under firmware control, enabling dynamic reconfiguration of which domain owns the bus during boot or fault recovery sequences.
おすすめ
Instrumentation Signal Interfaces
Test and measurement instruments frequently translate between low-voltage reference-based acquisition buses and 3.3 V LVTTL digital processing sections. The GTL2014PW's non-latching, transparent translation preserves timing relationships needed in sampled systems, while its low I/O capacitance (3.4-4.3 pF B-to-A) limits edge degradation on measurement bus lines. The wide -40 C to +85 C operating range suits benchtop and portable instruments alike. Because sampling receivers in GTL mode capture the bus state referenced to VREF, threshold accuracy at low VREF matters; the GTL2014's linear tracking to 0.5 V is the parameter that distinguishes it from the older GTL2005, whose linearity degrades below 0.8 V, making the GTL2014PW the preferred choice for low-reference instrument buses.
おすすめ
Legacy Design Maintenance and Migration
Third-party sourcing data assigns the GTL2014 family an estimated EOL date of 2028, making migration planning relevant for long-lifetime industrial, telecom, and transportation products. The GTL2014PW eases this transition because it is pin-to-pin backward compatible with the GTL2005 (A and B port labels interchanged) and shares the SOT402-1 TSSOP-14 footprint across variants such as the lead-free GTL2014PWZ. Engineering teams maintaining older Philips/NXP-era boards can drop the GTL2014PW into existing GTL2005 layouts to gain improved low-VREF tracking (0.5 V versus degraded linearity below 0.8 V), at the cost of slightly longer propagation delays. Recommended practice is to dual-qualify GTL2014PW and GTL2014PWZ today and monitor NXP product-change notifications.
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: GTL2014PW — 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 | GTL2014PWZ | GTL2005PW | TXS0104EGXUR | MAX13044EEBC+T |
|---|---|---|---|---|---|
| Package | TSSOP-14 (SOT402-1) | TSSOP-14 (SOT402-1) - same | TSSOP (SOT402-1) - same | TSSOP-14 - same | TSSOP-14 - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments | Analog Devices (Maxim Integrated) |
| Channel Count | 4-bit | 4-bit | 4-bit equivalent family | 4-bit | 4-channel |
| GTL VREF Tracking | Tracks down to 0.5 V | Tracks down to 0.5 V | Linearity degrades below 0.8 V | No GTL VREF (generic translation) | GTL-class reference translation |
| Direction Control | DIR pin | DIR pin | DIR pin | Automatic (OE pin) | DIR pin |
主な差別化要因
- Low-voltage VREF tracking （vs GTL2005PW)
- True GTL open-drain bus structures （vs TXS0104EGXUR)
- Asymmetric 5.5 V input tolerance （vs MAX13044EEBC+T)
設計ノート
GTL is an open-drain, terminated bus standard. Terminate the B port to VREF through appropriate pull-up resistors sized for the bus topology; the GTL2014PW only pulls the line low. Keep the termination network as close to the bus as practical, and route GTL lines as controlled-impedance traces. The B-to-A I/O capacitance of 3.4 to 4.3 pF (per the Philips/NXP datasheet) should be included in bus-loading calculations for multi-drop systems, since each translator adds stub capacitance that erodes setup/hold margins at high bus speeds.
The 5.5 V tolerance applies ONLY to the LVTTL inputs; the LVTTL outputs are not 5.5 V tolerant. Connecting a 5 V push-pull driver to the A-port output pin risks overstress. Also verify DIR pin state at power-up: in GTL-to-LVTTL sampling-receiver mode the translator reads the bus, while in LVTTL-to-GTL mode it drives it - an uninitialized DIR can cause bus contention on a shared GTL line. Finally, remember that GTL2014 is pin-to-pin backward compatible with GTL2005 with A/B port labels interchanged, so a direct footprint copy from a GTL2005 layout requires swapping the net connections.
The VREF pin defines the GTL-side switching thresholds, so its quality directly sets noise margin. Track VREF down to 0.5 V is a headline feature of the GTL2014 versus the GTL2005 (whose linearity degrades below 0.8 V); if your CPU interface references below 0.8 V, the GTL2014 is the correct family member. Decouple VCC and VREF locally with 100 nF ceramic capacitors. Note the trade-off: the GTL2014's improved low-VREF tracking comes with slightly longer propagation delays than the GTL2005 - budget this in high-speed timing closure.
コンプライアンス情報
Halogen-free compliant per cross-reference sourcing data; ECCN EAR99; country of origin Thailand. AEC-Q100 qualification not indicated in available data - treat as not qualified. RoHS/REACH status should be confirmed from the NXP product page certificate of conformity.
