1FEATURES

• 3:21 Data Channel Compression at up to

1.428 Gigabits/s Throughput

• Suited for Point-to-Point Subsystem

Communication With Very Low EMI

• 21 Data Channels Plus Clock in Low-Voltage

TTL and 3 Data Channels Plus Clock Out

Low-Voltage Differential

• Operates From a Single 3.3-V Supply and

250 mW (Typ)

• 5-V Tolerant Data Inputs

• 'LVDS95 Has Rising Clock Edge Triggered

Inputs

• Bus Pins Tolerate 6-kV HBM ESD

• Packaged in Thin Shrink Small-Outline

Package With 20 Mil Terminal Pitch

• Consumes <1 mW When Disabled

• Wide Phase-Lock Input Frequency Range

20 MHz to 68 MHz

• No External Components Required for PLL

• Inputs Meet or Exceed the Requirements of

ANSI EIA/TIA-644 Standard

• Industrial Temperature Qualified

TA = –40°C to 85°C

• Replacement for the National DS90CR215

DESCRIPTION

The SN65LVDS95 LVDS serdes (serializer/deserializer) transmitter contains three 7-bit parallel-load serial-out

shift registers, a 7× clock synthesizer, and four low-voltage differential signaling (LVDS) line drivers in a single

integrated circuit. These functions allow 21 bits of single-ended LVTTL data to be synchronously transmitted over

4 balanced-pair conductors for receipt by a compatible receiver, such as the SN65LVDS96.

When transmitting, data bits D0 through D20 are each loaded into registers of the SN65LVDS95 on the rising

edge of the input clock signal (CLKIN). The frequency of CLKIN is multiplied seven times and then used to

serially unload the data registers in 7-bit slices. The three serial streams and a phase-locked clock (CLKOUT)

are then output to LVDS output drivers. The frequency of CLKOUT is the same as the input clock, CLKIN.

The SN65LVDS95 requires no external components and little or no control. The data bus appears the same at

the input to the transmitter and output of the receiver with data transmission transparent to the user(s). The only

user intervention is the possible use of the shutdown/clear (SHTDN) active-low input to inhibit the clock and shut

off the LVDS output drivers for lower power consumption. A low level on this signal clears all internal registers to

a low level.

The SN65LVDS95 is characterized for operation over ambient air temperatures of –40°C to 85°C.