1FEATURES

2? IEEE 1149.1 (JTAG) Compliant and At-Speed

BIST Test Mode.

? All 8 Channels Synchronous to One Parallel

Clock Rate, from 18 to 66 MHz

? Duplicates Function of Multiple DS92LV1021

and '1023 10-Bit Serializer Devices

? Serializes from One to Eight 10-Bit Parallel

Inputs into Data Streams with Embedded

Clock

? Eight 5 mA Modified Bus LVDS Outputs that

are Capable to Drive Double Terminations

? @Speed Test - PRBS Generation to Check

LVDS Transmission Path to SCAN921224,

SCAN921226, SCAN921260, or SCAN926260

? On Chip Filtering for PLL

? 740mW Typ Power Dissipation (Loaded, PRBS,

66MHz, 3.3V)

? High Impedance Inputs and Outputs on Power

off

? Single Power Supply at +3.3V (+/-10%)

? 196-pin NFBGA Package

? Industrial Temperature Range Operation: -40

to +85°C

DESCRIPTION

The SCAN928028 integrates eight serializer devices

into a single chip. The SCAN928028 can

simultaneously serialize up to eight 10-bit data

streams. The 10-bit parallel inputs are LVTTL signal

levels. The serialized outputs are LVDS signals with

extra drive current for point-to-point and lightly loaded

multidrop applications. Each serializer block in the

SCAN928028 operates independently by using

strobes from a single shared PLL.

The SCAN928028 uses a single +3.3V power supply

with a typical power dissipation of 740mW (3.3V /

PRBS / 66 MHz). Each serializer channel has a unique power down control to further conserve power

consumption.

For high-speed LVDS serial data transmission, line

quality is essential, thus the SCAN928028 includes

an @SPEED TEST function. Each Serializer channel

has the ability to internally generate a PRBS data

pattern. This pattern is received by specific

deserializers (SCAN921224) which have the

complement PRBS verification circuit. The

deserializer checks the data pattern for bit errors and

reports any errors on the test verification pins on the

deserializer.

For additional information - please see the Application

Information section in this datasheet.