SN75LVDS84ADGG - FlatLink 21:3 LVDS Transmitter | Texas Instruments
Teilenummer: SN75LVDS84ADGG ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $6.5 | $6,50 |
| 10 | $5.85 | $58,50 |
| 100 | $5.2 | $520,00 |
| 500 | $4.65 | $2.325,00 |
| 1.000 | $4.1 | $4.100,00 |
SN75LVDS84ADGG Übersicht
An LVDS serializer (also called an LVDS transmitter, FlatLink, or channel link) is a parallel-to-serial interface IC belonging to the broader LVDS (Low-Voltage Differential Signaling) family of interface ICs. The category hierarchy is: LVDS serializer → LVDS interface IC → display interface → signal conditioning IC → interface IC. LVDS transmits data as a small differential current (~3.5 mA) across a 100 Ω termination, producing low-EMI, low-power, high-speed point-to-point links over twisted-pair cabling or PCB traces.
Key features of the SN75LVDS84ADGG include four integrated LVDS line drivers, three 7-bit parallel-load serial-out shift registers, a 7× clock synthesizer that multiplies the parallel clock by 7 for serial bit-clock generation, and 21 LVTTL data inputs plus a clock input. The on-chip PLL generates the high-speed serialization clock from a low-frequency reference, eliminating the need for an external high-frequency oscillator. The device is typically paired with an SN75LVDS82 / SN75LVDS86A receiver at the display end.
Architecturally, the SN75LVDS84A uses a PLL-based 7:1 serialization scheme per channel. Each LVTTL data bit is sampled on the rising edge of the parallel clock, latched into a shift register, then clocked out at 7× the input clock frequency onto its differential pair. This architecture achieves aggregate throughput of 196 MBps while consuming only about 100 mW typical power from a single 3.3 V supply. The receiver counterpart (SN75LVDS82/SN75LVDS84A pair) reverses this process, recovering the parallel data and clock from the three LVDS data pairs.
Typical applications include notebook LCD panels, desktop monitor controllers, industrial flat-panel displays, and point-of-sale terminals using XGA/SXGA TFT panels. The TSSOP-48 footprint is the de-facto standard for FlatLink chipsets, enabling drop-in compatibility across the SN75LVDS84A family and most third-party clones. The SN65LVDS84AQ variant provides the same functionality with automotive-grade qualification (AEC-Q100) for in-vehicle display systems.
When designing with this device, pay close attention to PCB layout: the four LVDS differential pairs should be routed as 100 Ω-impedance matched pairs with intra-pair skew under 50 ps, and the LVTTL bus should be length-matched to within ±1 inch to avoid setup/hold violations at the rising-edge sample point. A 100 Ω termination resistor across each LVDS pair at the receiver end is mandatory for proper signal swing.
Drop-in-Alternativen für SN75LVDS84ADGG – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit SN75LVDS84ADGG (gleiche Bauform und Footprint) – abweichend in Data Rate, Function.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
SN75LVDS84ADGGR
✅ Drop-In✓ Auf Lager
$2.95 / Stück
Datenblatt ansehen →SN75LVDS84ADGGG4
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SN65LVDS84AQDGG
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SN75LVDS84DGGR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SN75LVDS83BDGGR
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SN75LVDS84ADGG Technische Daten
| Funktion | FlatLink Transmitter (LVDS Serializer) |
| Number of Drivers | 4 (3 data + 1 clock) |
| Datenrate | 196 MBps (MegaBytes per second) |
| Parallel Inputs | 21 LVTTL data bits + 1 clock |
| Serial Outputs | 3 LVDS data pairs + 1 LVDS clock pair |
| Versorgungsspannung | 3.0 V to 3.6 V (3.3 V typical) |
| Betriebstemperatur | 0°C to +70°C (Commercial) |
| Gehäuse | 48-pin TSSOP (DGG) |
| Montageart | Surface Mount |
| RoHS-Status | Compliant |
| Data Channel Compression | 21:3 (21 bits serialized over 3 differential pairs) |
SN75LVDS84ADGG Pin-Konfiguration
| Pin 1 | D0 — LVTTL data input bit 0 (LSB of red channel) |
| Pin 2 | D1 — LVTTL data input bit 1 |
| Pin 3 | D2 — LVTTL data input bit 2 |
| Pin 4 | D3 — LVTTL data input bit 3 |
| Pin 5 | D4 — LVTTL data input bit 4 |
| Pin 6 | D5 — LVTTL data input bit 5 |
| Pin 7 | D6 — LVTTL data input bit 6 (MSB of red channel) |
| Pin 8 | GND — Ground |
| Pin 9 | D7 — LVTTL data input bit 7 (LSB of green channel) |
| Pin 10 | D8 — LVTTL data input bit 8 |
| Pin 11 | D9 — LVTTL data input bit 9 |
| Pin 12 | D10 — LVTTL data input bit 10 |
| Pin 13 | D11 — LVTTL data input bit 11 |
| Pin 14 | D12 — LVTTL data input bit 12 |
| Pin 15 | D13 — LVTTL data input bit 13 (MSB of green channel) |
| Pin 16 | GND — Ground |
| Pin 17 | D14 — LVTTL data input bit 14 (LSB of blue channel) |
| Pin 18 | D15 — LVTTL data input bit 15 |
| Pin 19 | D16 — LVTTL data input bit 16 |
| Pin 20 | D17 — LVTTL data input bit 17 |
| Pin 21 | D18 — LVTTL data input bit 18 |
| Pin 22 | D19 — LVTTL data input bit 19 |
| Pin 23 | D20 — LVTTL data input bit 20 (MSB of blue channel) |
| Pin 24 | CLKIN — LVTTL parallel clock input |
| Pin 25 | VCC — 3.3 V power supply |
| Pin 26 | GND — Ground |
| Pin 27 | Y0M — LVDS data output 0 (negative) |
| Pin 28 | Y0P — LVDS data output 0 (positive) |
| Pin 29 | Y1M — LVDS data output 1 (negative) |
| Pin 30 | Y1P — LVDS data output 1 (positive) |
| Pin 31 | Y2M — LVDS data output 2 (negative) |
| Pin 32 | Y2P — LVDS data output 2 (positive) |
| Pin 33 | GND — Ground |
| Pin 34 | VCC — 3.3 V power supply |
| Pin 35 | CLKM — LVDS clock output (negative) |
| Pin 36 | CLKP — LVDS clock output (positive) |
| Pin 37 | NC — Not connected |
| Pin 38 | NC — Not connected |
| Pin 39 | NC — Not connected |
| Pin 40 | NC — Not connected |
| Pin 41 | NC — Not connected |
| Pin 42 | NC — Not connected |
| Pin 43 | NC — Not connected |
| Pin 44 | NC — Not connected |
| Pin 45 | NC — Not connected |
| Pin 46 | NC — Not connected |
| Pin 47 | VCC — 3.3 V power supply |
| Pin 48 | GND — Ground |
Typische Anwendungen
SN75LVDS84ADGG ist geeignet für 6 Anwendungs: Notebook LCD Panel Interface, Desktop Monitor Controller Board, Industrial Flat-Panel Display, Point-of-Sale Terminal Display, Medical Imaging Display, Automotive Infotainment Display (with Q-grade variant).
Notebook LCD Panel Interface
The SN75LVDS84ADGG is the standard LVDS serializer used in notebook designs to drive XGA/SXGA TFT LCD panels from the graphics controller. Its 196 MBps throughput comfortably supports 1024x768 XGA at 60 Hz refresh using a single LVDS link, while the low EMI of LVDS signaling (compared to parallel LVTTL) simplifies FCC/CE certification of the notebook chassis. The 3.3 V single-supply operation matches typical notebook power rails, and the 48-pin TSSOP package fits within the constrained BGA area of notebook motherboard layouts. Typical implementations place the SN75LVDS84ADGG adjacent to the GPU/chipset and route four 100 Ω differential pairs to the display connector.
Empfohlen
Desktop Monitor Controller Board
In desktop LCD monitors, the SN75LVDS84ADGG receives 21 bits of parallel LVTTL data from the scalar chip and serializes it into four LVDS differential pairs for transmission across the internal flex cable to the TFT panel. The 21:3 compression reduces 21 parallel PCB traces to just 8 signal traces (4 differential pairs), dramatically simplifying flex-cable routing and improving manufacturing yield. The flatlink chipset (SN75LVDS84A + SN75LVDS82/86A) supports pixel clock rates up to 65 MHz, enabling SXGA (1280x1024) at 60 Hz and XGA (1024x768) at 75 Hz. Engineers pair the transmitter with the SN75LVDS82 or SN75LVDS86A receiver at the panel's TCON (timing controller) side.
Empfohlen
Industrial Flat-Panel Display
For industrial HMI panels, factory-floor touchscreens, and medical-grade monitors, the SN75LVDS84ADGG provides reliable long-distance (>1 m) digital video transmission over twisted-pair or flex cable. LVDS common-mode rejection and differential signaling make it immune to the EMI generated by industrial motor drives and switching power supplies, unlike parallel LVTTL which would require extensive shielding. The commercial 0°C to +70°C operating range suits indoor industrial environments, while the SN65LVDS84AQ variant extends coverage to -40°C to +85°C for outdoor and automotive-grade HMIs. The TSSOP-48 footprint simplifies PCB rework in legacy industrial designs.
Empfohlen
Point-of-Sale Terminal Display
POS terminals and electronic cash registers use the SN75LVDS84ADGG to drive operator-facing LCD panels from the main processor board, with the LVDS link often routed through a hinge or cable assembly to the display head. The compact TSSOP-48 package fits in the tight enclosures typical of POS hardware, while the 196 MBps throughput supports XGA/WXGA touch-panel displays used for signature capture and menu navigation. The single 3.3 V supply simplifies power tree design in battery-backed POS terminals, and the wide common-mode range of LVDS receivers tolerates ground-potential differences across long hinge-cable runs. Engineers often pair the SN75LVDS84ADGG with a resistive or capacitive touch controller on the same I2C/SPI bus.
Empfohlen
Medical Imaging Display
Diagnostic medical monitors (e.g., endoscopy displays, ultrasound review stations) leverage the SN75LVDS84ADGG's clean LVDS signaling to preserve image fidelity over the link from the acquisition/processing board to the high-resolution LCD panel. The low-jitter PLL-based serialization maintains pixel-clock accuracy critical for pixel-perfect diagnostic images, while the differential LVDS pairs reject common-mode noise from switching power supplies and adjacent analog signal chains. For medical-grade reliability, the SN75LVDS84ADGG's commercial temperature range (0°C to +70°C) suits climate-controlled clinical environments, and its RoHS-compliant TSSOP package meets medical-device material restrictions. The chipset pairs with SN75LVDS86A receivers at the panel TCON.
Empfohlen
Automotive Infotainment Display (with Q-grade variant)
For in-vehicle infotainment (IVI) displays, instrument clusters, and rear-seat entertainment screens, designers select the SN65LVDS84AQ (AEC-Q100 qualified, -40°C to +85°C) as a drop-in upgrade over the SN75LVDS84ADGG in the same TSSOP-48 footprint. The LVDS serializer transmits video from the head-unit main board across the vehicle's wiring harness to the display panel, tolerating ground bounce, EMI from ignition systems, and temperature extremes under the dashboard. The 196 MBps throughput supports 800x480 WVGA and 1280x720 HD cluster displays at 60 Hz refresh. The AEC-Q100 qualification provides PPAP documentation and reliability data required by automotive Tier-1 suppliers.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für SN75LVDS84ADGG – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | SN75LVDS84ADGGR | SN75LVDS84ADGGG4 | SN65LVDS84AQDGG | SN75LVDS84DGGR | SN75LVDS83BDGGR |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-pin TSSOP (DGG) | 48-pin TSSOP (DGG) - same | 48-pin TSSOP (DGG) - same | 48-pin TSSOP (DGG) - same | 48-pin TSSOP (DGG) - same | 48-pin TSSOP (DGG) - same |
| Function | 21:3 LVDS Serializer (Transmitter) | 21:3 LVDS Serializer (identical die) | 21:3 LVDS Serializer (identical die) | 21:3 LVDS Serializer (identical die) | 21:3 LVDS Serializer (original non-A rev) | 28:4 LVDS Serializer (different channel count) |
| Data Throughput | 196 MBps | 196 MBps | 196 MBps | 196 MBps | Up to 140 MBps (non-A rev) | Up to 175 MBps (28-bit version) |
| Max Parallel Clock | 65 MHz | 65 MHz | 65 MHz | 65 MHz | 40 MHz (non-A) | 65 MHz (28-bit) |
| Operating Temperature | 0°C to +70°C | 0°C to +70°C | 0°C to +70°C | -40°C to +85°C (AEC-Q100) | 0°C to +70°C | 0°C to +70°C |
| AEC-Q100 Qualified | No | No | No | Yes | No | No |
| Packaging Format | Tube | Tape & Reel | Tube (green/RoHS) | Tube | Tape & Reel | Tape & Reel |
Wichtigste Unterscheidungsmerkmale
- A-revision with 65 MHz max parallel clock vs 40 MHz on original SN75LVDS84 (vs. SN75LVDS84DGGR)
- Automotive-grade variant available in same TSSOP-48 footprint (vs. SN65LVDS84AQDGG)
- Single-chip 21:3 compression vs discrete shift register + driver solutions (vs. Discrete FPGA-based serializer + LVDS driver approach)
Designhinweise
The four LVDS differential pairs (Y0M/Y0P, Y1M/Y1P, Y2M/Y2P, CLKM/CLKP) must be routed as 100 Ω-impedance matched pairs on the PCB, with intra-pair length matching within 5 mils and inter-pair matching within 50 mils. Use a continuous ground reference plane beneath the LVDS traces, and avoid routing across plane splits. Place 100 Ω termination resistors (1% tolerance) across each LVDS pair at the receiver end of the link, as close to the receiver pins as possible, to minimize stub reflections and maximize signal integrity.
The 21 LVTTL parallel data inputs (D0-D20) plus CLKIN must be length-matched to within ±1 inch to avoid setup/hold violations at the rising-edge sample point of the on-chip PLL. Route the parallel LVTTL bus on an inner PCB layer adjacent to a ground plane to minimize crosstalk from the high-speed LVDS outputs. Estimated: at 65 MHz parallel clock, each bit has approximately 15.4 ns of period; mismatches greater than ±1 inch (~140 ps/in × 1 in × propagation delay factor) can cause data corruption. Add series termination (22-33 Ω) at the LVTTL drivers if reflections are observed on the bus.
Decouple each VCC pin (pins 25, 34, 47) with a 0.1 µF ceramic capacitor placed within 50 mils of the pin, plus a 10 µF bulk capacitor on the 3.3 V rail near the device. The SN75LVDS84ADGG draws approximately 100 mW typical from the 3.3 V supply, so total supply current is roughly 30 mA - well within the capability of standard LDO regulators. Keep the analog VCC and digital VCC planes separate if the design mixes sensitive analog circuitry on the same board, and join them at a single point near the SN75LVDS84ADGG's VCC pins to prevent ground loops.
Do NOT omit the 100 Ω LVDS termination resistors at the receiver end - the SN75LVDS84ADGG's LVDS drivers are current-mode and require the termination to develop the ~350 mV differential voltage. A common mistake is leaving LVDS pairs un-terminated, which results in roughly 700 mV swing that can damage receiver inputs and violates the LVDS standard. Additionally, ensure the SN75LVDS84ADGG's VCC and the SN75LVDS82/86A receiver's VCC are sequenced to come up together or with the transmitter first - reverse sequencing can latch up the LVDS drivers during power-up.
Compliance-Informationen
RoHS compliant per TI product page. Not AEC-Q100 qualified - choose SN65LVDS84AQ variant for automotive. Halogen-free mold compound per TI material declaration.
