CY7B923/CY7B933
HOTLink
®
Transmitter/Receiver
Features
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Functional Description
The CY7B923 HOTLink
‚
transmitter and CY7B933 HOTLink
receiver are point-to-point communications building blocks that
transfer data over high-speed serial links (fiber, coax, and twisted
pair). Standard HOTLink data rates range from 160 to 330 Mbps.
Higher speed HOTLink is also available for high-speed applica-
tions (160 to 400 Mbits/second).
Figure 1
illustrates typical
connections to host systems or controllers.
Eight bits of user data or protocol information are loaded into the
HOTLink transmitter and are encoded. Serial data is shifted out
of the three differential PECL serial ports at the bit rate (which is
ten times the byte rate).
The HOTLink receiver accepts the serial bit stream at its differ-
ential line receiver inputs and, using a completely integrated PLL
clock synchronizer, recovers the timing information necessary
for data reconstruction. The bit stream is deserialized, decoded,
and checked for transmission errors. Recovered bytes are
presented in parallel to the receiving host along with a byte-rate
clock.
The 8B/10B encoder/decoder can be disabled in systems that
already encode or scramble the transmitted data. I/O signals are
available to create a seamless interface with both asynchronous
FIFOs (that is, CY7C42X) and clocked FIFOs (that is,
CY7C44X). A BIST pattern generator and checker allows testing
of the transmitter, receiver, and the connecting link as a part of a
system diagnostic check.
HOTLink devices are ideal for a variety of applications where a
parallel interface can be replaced with a high-speed
point-to-point serial link. Applications include interconnecting
workstations, servers, mass storage, and video transmission
equipment.
Fibre Channel-compliant
IBM ESCON
-compliant
DVB-ASI-compliant
ATM-compliant
8B/10B-coded or 10-bit unencoded
Standard HOTLink
: 160 to 330 Mbps
High-speed HOTLink: 160 to 400 Mbps for high-speed
applications
Transistor-transistor logic (TTL)-synchronous I/O
No external phase locked-loop (PLL) components
Triple positive emitter coupled logic (PECL) 100 K serial
outputs
Dual PECL 100 K serial inputs
Low-power: 350 mW (Tx), 650 mW (Rx)
Compatible with fiber-optic modules, coaxial cable, and twisted
pair media
Built-in self-test (BIST)
Single +5-V supply
28-pin small outline integrated circuit (SOIC)/plastic leaded
chip carrier (PLCC)
Pb-free packages available
0.8- bipolar complementary metal oxide semiconductor
(BiCMOS)
CY7B923 Transmitter Block Diagram
Cypress Semiconductor Corporation
Document Number: 38-02017 Rev. *K
•
198 Champion Court
•
San Jose
,
CA 95134-1709
•
408-943-2600
Revised November 7, 2017
CY7B923/CY7B933
Contents
Pin Configurations ........................................................... 4
Pin Descriptions ............................................................... 6
CY7B923 HOTLink Transmitter
Block Diagram Description .............................................. 8
Input Register .............................................................. 8
Encoder ....................................................................... 8
Shifter .......................................................................... 8
OutA, OutB, OutC ........................................................ 8
Clock Generator .......................................................... 8
Test Logic .................................................................... 9
CY7B933 HOTLink Receiver
Block Diagram Description .............................................. 9
Serial Data Inputs ........................................................ 9
PECL-TTL Translator .................................................. 9
Clock Synchronization ................................................. 9
Framer ......................................................................... 9
Shifter .......................................................................... 9
Decode Register .......................................................... 9
Decoder ..................................................................... 10
Output Register ......................................................... 10
Test Logic .................................................................. 10
HOTLink CY7B923 Transmitter and CY7B933
Receiver Operation ......................................................... 10
CY7B923 HOTLink Transmitter
Operating Mode Description ......................................... 11
Encoded Mode Operation ......................................... 12
Bypass Mode Operation ............................................ 13
PECL Output Functional and Connection Options .... 13
Transmitter Serial Data Characteristics ....................... 13
Transmitter Test Mode Description .............................. 13
BIST Mode ................................................................ 15
Test Mode ................................................................. 16
CY7B933 HOTLink Receiver
Operating Mode Description ......................................... 16
Encoded Mode Operation ......................................... 16
Bypass Mode Operation ............................................ 17
Parallel Output Function ............................................ 17
Receiver Serial Data Requirements .............................. 17
Receiver Test Mode Description ................................... 18
BIST Mode ................................................................ 18
Test Mode ................................................................. 18
X3.230 Codes and Notation Conventions .................... 18
Notation Conventions ................................................ 18
8B/10B Transmission Code ....................................... 19
Transmission Order ................................................... 19
Valid and Invalid Transmission Characters ............... 19
Using the Tables for
Generating Transmission Characters ............................... 20
Using the Tables for Checking the Validity of
Received Transmission Characters .................................. 20
Valid Data Characters (SC/D = LOW) ............................ 21
Valid Special Character Codes and Sequences
(SC/D = HIGH)[1, 2] ......................................................... 29
Maximum Ratings ........................................................... 30
Operating Range ............................................................. 30
CY7B923/CY7B933 Electrical Characteristics ............. 30
Capacitance[13] .............................................................. 31
Transmitter Switching Characteristics ......................... 32
Receiver Switching Characteristics .............................. 33
Switching Waveforms .................................................... 34
Ordering Information ...................................................... 37
Ordering Code Definitions ......................................... 37
Package Diagrams .......................................................... 38
Acronyms ........................................................................ 40
Document Conventions ................................................. 40
Units of Measure ....................................................... 40
Document History Page ................................................. 41
Sales, Solutions, and Legal Information ...................... 42
Worldwide Sales and Design Support ....................... 42
Products .................................................................... 42
PSoC® Solutions ...................................................... 42
Cypress Developer Community ................................. 42
Technical Support ..................................................... 42
Document Number: 38-02017 Rev. *K
Page 3 of 42
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