GTL2012DP - 2-Bit LVTTL to GTL Transceiver | NXP Semiconductors
Артикул: GTL2012DP ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 1 | $0.85 | $0,85 |
| 10 | $0.72 | $7,20 |
| 100 | $0.55 | $55,00 |
| 500 | $0.44 | $220,00 |
| 1.000 | $0.36 | $360,00 |
GTL2012DP Обзор
A level translator (also called a logic-level shifter or voltage translator) is an interface IC that safely bridges digital circuits operating at different supply domains, sitting within the broader hierarchy of logic ICs and interface ICs in a system. In mixed-voltage designs - for example a 3.3 V microcontroller driving a GTL backplane or memory bus that swings near 1 V - the translator prevents overvoltage damage while preserving logic levels and signal edge rates.
Key features of the GTL2012 include 2 bidirectional translating channels in a single 8-pin package, a DIR control pin for mode selection, and LVTTL inputs tolerant up to 5.5 V, allowing direct connection to TTL or 5 V CMOS sources without external protection. Support for the GTL-, GTL, and GTL+ bus standards gives designers flexibility across legacy backplane and processor bus architectures.
Technically, the device operates from a 3.3 V supply and translates between the LVTTL domain and the open-drain GTL domain, whose reference level is set by the GTL bus termination. Because GTL is a low-swing, terminated bus technology, the output stage is optimized for low-voltage swings and fast transitions, suiting memory interfaces and processor front-side buses in industrial systems.
Typical applications include 3.3 V MCU or DSP interfacing to GTL-based backplanes, translation between TTL/5 V CMOS logic and GTL signaling, industrial control modules with legacy GTL buses, and communication cards requiring 2-bit bus isolation. The 5.5 V tolerant inputs are especially useful when legacy TTL boards must connect to modern 3.3 V logic.
Design consideration: verify DIR timing so the part does not switch direction while a bus transaction is in flight, since both GTL outputs are open-drain type and contention resolution depends on bus termination.
This page adds value beyond the manufacturer datasheet by synthesizing distributor sourcing data, engineering design notes, FAQ answers, and application guidance in one place. Pricing below is an estimate pending verification as of 2026-10-19.
Аналоги без доработки для GTL2012DP — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
GTL2012DC,125
✅ Прямая замена ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
GTL2012DP Характеристики
| Функция | 2-bit bidirectional LVTTL to GTL translating transceiver |
| Bus Standards Supported | GTL-, GTL, GTL+ |
| System Side Supply Voltage | 3.3 V |
| LVTTL Input Tolerance | Up to 5.5 V (TTL / 5 V CMOS compatible) |
| Каналы | 2 bidirectional |
| Direction Control | DIR pin (GTL-to-LVTTL receiver or LVTTL-to-GTL interface) |
| Диапазон рабочих температур | -40C to +85C |
| Package Type | VSSOP-8 / TSSOP-8 (SOT765-1, MO-187), plastic |
| Число выводов | 8 |
| Terminal Form | Gull wing, surface mount |
| Тип монтажа | Surface Mount |
| Статус RoHS | RoHS compliant |
| Temperature Grade | Industrial |
Руководство по цоколевке GTL2012DP в корпусе vssop-8 / tssop-8 (sot765-1, mo-187), plastic
Цоколевка для GTL2012DP (корпус vssop-8 / tssop-8 (sot765-1, mo-187), plastic). Нумерация выводов, функции и схемы подключения определены в техническом описании производителя. Обратитесь к нему для точного посадочного места и рекомендаций по пайке.
Нет подробных данных о распиновке для GTL2012DP.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
GTL2012DP подходит для 6 применениеs: 3.3V MCU to GTL Backplane Interface, Legacy 5V TTL Board Interfacing, Processor Memory Bus Translation, Industrial Control Module Retrofits, Communication Card Level Translation, Test and Measurement Fixtures.
3.3V MCU to GTL Backplane Interface
Industrial and telecom backplanes built on the GTL, GTL-, or GTL+ standard require a low-swing, terminated bus that a 3.3 V microcontroller cannot drive directly. The GTL2012DP sits between the MCU GPIO or bus pins and the GTL backplane, using its DIR pin to switch between driving the bus (LVTTL-to-GTL) and sampling it (GTL-to-LVTTL receiver mode). Because the GTL side is designed for the bus termination network, signal integrity is maintained even on multi-drop backplanes. The 2-bit channel count suits address or control strobes, and the -40C to +85C industrial rating covers uncooled shelf environments. Place the translator close to the backplane connector to minimize stub length and preserve edge rates on the low-swing GTL lines.
Рекомендуется
Legacy 5V TTL Board Interfacing
Many retrofit projects must connect modern 3.3 V controllers to legacy TTL or 5 V CMOS boards. The GTL2012DP directly addresses this because its LVTTL inputs are tolerant up to 5.5 V, allowing TTL or 5 V CMOS outputs to drive the translator without series protection or clamping diodes. On the opposite side, the part provides standard GTL bus signaling for systems that retained GTL memory or backplane segments. This eliminates an entire protection stage, saving board area in an 8-pin SOT765-1 footprint. Engineers should still verify that the legacy board's high state does not exceed 5.5 V under all load conditions, and keep DIR static while the legacy bus is actively driving to avoid momentary contention.
Рекомендуется
Processor Memory Bus Translation
GTL was widely used on processor front-side and memory buses because its low voltage swing reduces switching noise and power in terminated transmission-line environments. When replacing or extending systems with GTL-based memory control, the GTL2012DP provides 2 bits of GTL-to-LVTTL sampling or LVTTL-to-GTL driving, letting a 3.3 V logic system participate in the GTL domain. The open-drain-style GTL output works naturally with the bus termination, and the DIR pin supports half-duplex bus turnaround between read and write phases. Designers should sequence DIR changes with the bus turnaround gap specified by the memory controller and verify propagation delay against bus timing budgets, since the datasheet's AC parameters govern maximum bus frequency.
Рекомендуется
Industrial Control Module Retrofits
Industrial control modules often mix voltage domains after partial upgrades: a new 3.3 V controller card must coexist with older GTL-based I/O or communication segments. The GTL2012DP provides an isolated 2-bit translation stage in a compact SOT765-1 package that fits dense module layouts. Its industrial -40C to +85C temperature rating aligns with factory-floor ambient conditions, and RoHS compliance keeps new builds compliant with environmental directives. The 5.5 V tolerant inputs add robustness when field wiring brings unknown legacy logic levels to the module. Use a controlled DIR signal derived from the module's bus arbitration logic, and decouple the 3.3 V supply with at least a 100 nF ceramic capacitor placed within a few millimeters of the supply pin.
Рекомендуется
Communication Card Level Translation
Line cards and communication adapters frequently need small quantities of GTL signaling for management buses, backplane handshakes, or legacy framer interfaces while their main logic runs at 3.3 V. The GTL2012DP offers a minimal-footprint answer: two bidirectional translating channels, a single DIR pin for direction control, and 5.5 V tolerant inputs that survive exposure to TTL-level management signals. Because GTL signaling swings are low, crosstalk into adjacent high-speed lines is limited, but designers should still route GTL traces as controlled-impedance lines over a continuous ground plane and terminate them per the backplane specification. The 8-pin package allows placement directly at the card edge connector, minimizing trace length in the terminated domain.
Рекомендуется
Test and Measurement Fixtures
Bench fixtures and production test adapters frequently must probe or stimulate GTL-level buses using 3.3 V instrumentation. The GTL2012DP acts as a safe translation stage: in GTL-to-LVTTL receiver mode it samples the low-swing GTL bus and reproduces it as clean LVTTL for logic analyzers or MCU capture timers; in LVTTL-to-GTL mode it injects stimulus into the terminated bus under test. The 5.5 V tolerant inputs protect against accidental connection to TTL-level test points, a common hazard on mixed-technology fixtures. Because the part adds its own propagation delay, calibration of timing measurements should account for the translator stage, and the DIR pin should be driven by the fixture controller rather than a manual switch to guarantee glitch-free direction changes.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для GTL2012DP — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | GTL2012DC,125 |
|---|---|---|
| Package | VSSOP-8 / TSSOP-8 (SOT765-1, MO-187) | 8-pin SOT765-1 variant - same family footprint (confirm outline) |
| Brand | NXP Semiconductors | NXP Semiconductors |
| Translation Channels | 2 bidirectional | 2 bidirectional |
| Bus Standards | GTL-, GTL, GTL+ | GTL-, GTL, GTL+ |
| LVTTL Input Tolerance | Up to 5.5 V | Up to 5.5 V |
| Direction Control | DIR pin | DIR pin |
| Supply Voltage | 3.3 V | 3.3 V |
| Operating Temperature | -40C to +85C | -40C to +85C |
Ключевые отличия
- Purpose-built GTL bus translation (против PCA9306DTR2G)
- 5.5 V tolerant LVTTL inputs (против Generic 3.3 V dual-supply translators)
- Same-family substitution path (против GTL2012DC,125)
Заметки по проектированию
Place the GTL2012DP as close as possible to the backplane connector or GTL bus entry point. GTL is a low-swing terminated bus standard, so stub length between the translator and termination network adds reflections that erode timing margin. Route GTL traces over an unbroken ground plane with controlled impedance, and keep the 3.3 V decoupling capacitor (100 nF ceramic recommended) within a few millimeters of the supply pin with a solid via to the ground plane.
Do not toggle the DIR pin while a GTL bus transaction is in progress. The GTL side drives a terminated bus, and changing direction mid-transaction can cause momentary contention or bus glitches visible to other receivers. Coordinate DIR changes with the bus turnaround gap defined by the system controller. Also remember the 5.5 V tolerance applies to the LVTTL inputs only - never expose the GTL pins to TTL-level voltages.
Verify the AC timing (propagation delay through the translator) against the overall bus timing budget before fixing the bus clock frequency. Estimated check: if the datasheet propagation delay per direction is on the order of a few nanoseconds, add it to trace flight time (approximately 150 ps per inch of FR-4 trace) when computing setup margins at the far-end receiver. Consult the NXP GTL2012 datasheet AC tables for the guaranteed limits at your supply and temperature corner.
Информация о соответствии
RoHS compliance is listed in the verified digchip specification record for GTL2012DP and the ,118 ordering suffix follows NXP's RoHS convention. REACH, halogen-free, and conflict minerals status not stated in provided data; request official NXP compliance documentation.
