Overview
The DS90C385AMTX is a 3.3V programmable LVDS (Low Voltage Differential Signaling) transmitter designed by Texas Instruments, although it is often associated with National Semiconductor due to historical mergers and acquisitions. This device is part of the FPD-Link (Flat Panel Display Link) family and is specifically tailored for high-speed data transmission in flat panel display applications. It is a pin-to-pin compatible replacement for the DS90C383, DS90C383A, and DS90C385, offering enhanced features and improvements.
Key Specifications
| Parameter | Description | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Number of Drivers | 4 | - | - | - | - |
| Data Rate | Up to 2.45 Gbps | - | - | - | - |
| Protocol | FPD-Link, LVDS | - | - | - | - |
| Voltage - Supply | 3V ~ 3.6V | 3V | 3.3V | 3.6V | V |
| Operating Temperature | -10°C ~ 70°C | -10°C | - | 70°C | °C |
| Package | TSSOP-56 (6.1mm Width) | - | - | - | - |
| Differential Output Voltage (VOD) | 250 ~ 450 mV | 250 mV | 345 mV | 450 mV | mV |
| Offset Voltage (VOS) | 1.13 ~ 1.38 V | 1.13 V | 1.25 V | 1.38 V | V |
Key Features
- No special start-up sequence required between clock/data and /PD pins.
- Support for spread spectrum clocking up to 2.45 Gbps.
- Converts 28 bits of LVCMOS/LVTTL data into four LVDS signals.
- Compliant with TIA/EIA-644 LVDS standard.
- Low profile 56-lead TSSOP package.
- Supports VGA, SVGA, XGA, SXGA (Dual Pixel), SXGA+ (Dual Pixel), and UXGA (Dual Pixel) resolutions.
- Narrow bus reduces cable size and cost.
- PLL requires no external components.
- Low EMI due to 345 mV (typ) swing LVDS devices.
Applications
The DS90C385AMTX is primarily used in high-speed data transmission applications, particularly in flat panel displays such as LCD monitors, TVs, and other display systems. It is also suitable for solving EMI and cable size problems associated with wide, high-speed TTL interfaces.
Q & A
- What is the primary function of the DS90C385AMTX?
The DS90C385AMTX is a 3.3V programmable LVDS transmitter that converts 28 bits of LVCMOS/LVTTL data into four LVDS signals for high-speed data transmission in flat panel display applications.
- What are the key specifications of the DS90C385AMTX?
The key specifications include a data rate of up to 2.45 Gbps, a supply voltage of 3V to 3.6V, and an operating temperature range of -10°C to 70°C. It also features a 56-lead TSSOP package.
- Is the DS90C385AMTX compatible with other devices?
Yes, it is pin-to-pin compatible with the DS90C383, DS90C383A, and DS90C385, making it an ideal replacement for these devices.
- What are the benefits of using the DS90C385AMTX?
The benefits include reduced EMI, narrower bus which reduces cable size and cost, and support for spread spectrum clocking.
- What types of displays does the DS90C385AMTX support?
The device supports various display resolutions including VGA, SVGA, XGA, SXGA (Dual Pixel), SXGA+ (Dual Pixel), and UXGA (Dual Pixel).
- Does the DS90C385AMTX require any external components for the PLL?
No, the PLL requires no external components.
- Is the DS90C385AMTX RoHS compliant?
Yes, the DS90C385AMTX is RoHS compliant.
- What is the typical differential output voltage of the DS90C385AMTX?
The typical differential output voltage (VOD) is 345 mV.
- Can the DS90C385AMTX be used as a replacement for other FPD-Link transmitters?
Yes, it can be used as a replacement for the DS90CF583 and DS90CF581 FPD-Link transmitters with certain modifications.
- What is the significance of the spread spectrum clocking feature in the DS90C385AMTX?
The spread spectrum clocking feature helps in reducing EMI by spreading the clock signal across a wider frequency range.
