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3:21 Data Channel Expansion at up to

178.5 Mbytes/s Throughput

Suited for SVGA, XGA, or SXGA Display

Data Transmission From Controller to

Display With Very Low EMI

Three Data Channels and Clock

Low-Voltage Differential Channels In and

21 Data and Clock Low-Voltage TTL

Channels Out

Operates From a Single 3.3-V Supply and

250 mW (Typ)

5-V Tolerant SHTDN Input

ESD Protection Exceeds 4 kV on Bus Pins

Packaged in Thin Shrink Small-Outline

Package (TSSOP) With 20-Mil Terminal

Pitch

Consumes Less Than 1 mW When Disabled

Wide Phase-Lock Input Frequency Range

31 MHz to 68 MHz

No External Components Required for PLL

Open-Circuit Receiver Fail-Safe Design

Inputs Meet or Exceed the Requirements of

ANSI EIA/TIA-644 Standard

Improved Replacement for the National

DS90C562

description

The SN75LVDS86 FlatLink receiver contains three serial-in 7-bit parallel-out shift registers, a 7× clock

synthesizer, and four low-voltage differential signaling (LVDS) line receivers in a single integrated circuit. These

functions allow receipt of synchronous data from a compatible transmitter, such as the SN75LVDS81, ’83, ’84,

or ’85, over four balanced-pair conductors, and expansion to 21 bits of single-ended low-voltage TTL (LVTTL)

synchronous data at a lower transfer rate.

When receiving, the high-speed LVDS data is received and loaded into registers at seven times (7×) the LVDS

input clock (CLKIN) rate. The data is then unloaded to a 21-bit-wide LVTTL parallel bus at the CLKIN rate. A

phase-locked loop (PLL) clock synthesizer circuit generates a 7× clock for internal clocking and an output clock

for the expanded data. The SN75LVDS86 presents valid data on the falling edge of the output clock (CLKOUT).

The SN75LVDS86 requires only four line-termination resistors for the differential inputs and little or no control.

The data bus appears the same at the input to the transmitter and output of the receiver with the data

transmission transparent to the user. The only possible user intervention is the use of the shutdown/clear

(SHTDN) active-low input to inhibit the clock and shut off the LVDS receivers for lower power consumption. A

low level on this signal clears all internal registers to a low level.

The LVDS receivers of the SN75LVDS86 include an open-circuit fail-safe design, such that when the inputs are

not connected to an LVDS driver, the receiver outputs go to a low level. This occurs even when the line is

differentially terminated at the receiver inputs.

The SN75LVDS86 is characterized for operation over ambient free-air temperatures of 0C to 70C.