HC-5560_03 Datasheet, PDF (1/10 Pages) Intersil Corporation – PCM Transcoder

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July 2003
PCM Transcoder
Features
HC-5560
FN2887.3
The HC-5560 digital line transcoder provides encoding and
decoding of pseudo ternary line code substitution schemes.
Unlike other industry standard transcoders, the HC-5560
provides four worldwide compatible mode selectable code
substitution schemes, including HDB3 (High Density Bipolar
3), B6ZS, B8ZS (Bipolar with 6 or 8 Zero Substitution) and
AMI (Alternate Mark Inversion).
• Single 5V Supply . . . . . . . . . . . . . . . . . . . . . . 10mA (Typ)
• Mode Selectable Coding Including:
- AMI (T1, T1C)
- B8ZS (T1)
- HDB3 (PCM30)
• North American and European Compatibility
The HC-5560 is fabricated in CMOS and operates from a
single 5V supply. All inputs and outputs are TTL compatible.
Application Note #573, “The HC-5560 Digital Line
Transcoder,” by D.J. Donovan is available.
Part Number Information
PART TEMP. RANGE
NUMBER
(^oC)
PACKAGE
PKG. DWG. #
HC3-5560-5
0 to 70
20 Ld PDIP
E20.3
Pinout
HC-5560
(PDIP)
TOP VIEW
FORCE AIS 1
MODE SELECT 1 2
NRZ DATA IN 3
CLK ENC 4
MODE SELECT 2 5
NRZ DATA OUT 6
CLK DEC 7
RESET AIS 8
AIS 9
V_SS 10
20 V_DD
19 OUTPUT ENABLE
18 RESET
17 OUT1
16 OUT2
15 B_IN
14 LOOP TEST ENABLE
13 A_IN
12 CLOCK
11 ERROR
• Simultaneous Encoding and Decoding
• Asynchronous Operation
• Loop Back Control
• Transmission Error Detection
• Alarm Indication Signal
• Replaces MJ1440, MJ1471 and TCM2201 Transcoders
Applications
• North American and European PCM Transmission Lines
where Pseudo Ternary Line Code Substitution Schemes
are Desired
• Any Equipment that Interfaces T1, T1C, T2 or PCM30
Lines Including Multiplexers, Channel Service Units,
(CSUs) Echo Cancellors, Digital Cross-Connects (DSXs),
T1 Compressors, etc.
• Related Literature
- AN573, The HC-5560 Digital Line Transcoder
Functional Diagram
MODE ¹
SELECT ₂
NRZ DATA IN
CLK ENC
OUTPUT
ENABLE
TRANSMITTER/
ENCODER
V_DD
V_SS
CLOCK
OUT 1
OUT 2
LOOP TEST
ENABLE
A_IN
B_IN
FORCE AIS
RESET
CLK DEC
RESET AIS
SWITCH
RECEIVER/
DECODER
NRZ DATA
OUT
AIS
DETECT
ERROR
DETECT
ERROR
AIS
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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