CS61574A-IL1Z Datasheet CS61574A-IL1Z, CS61574A-IL1ZR, CS61575-IL1Z | P10-P12

40/3

4.%'

2.%'

20/3

42!.3-)4

42!.3&/2-%2

22).'

2%#%)6%

42!.3&/2-%2

#/.42/,

#3"

&2!-%2

#)2#5)4

44)0

4$!4!

2$!4!

42).'

,).%$2)6%2

!-)

":3

($"

#/$%2

42!.3-)4

42!.3&/2-%2

2,//0 0#3 ,%.,,//04!/3

#/.42/,

HARDWARE MODE

EXTENDED HARDWARE MODE

HOST MODE

#/.42/,



03%2)!,0/24

2#/$%4#/$%

#,+%

"06 !)3

*)44%2

!44%.5!4/2

$2)6%2-/.)4/2

,).%$2)6%2

,).%2%#%)6%2

-4)0

-2).'

$0-

24)0

44)0

42).'

4OR%

2%0%!4%2

-58

CS61575

CS61574A

CS61575

CS61574A

44)040/3

4.%'

2.%'

42).'

20/3

22).'

24)0

2,//0 ,%.,,//04!/3

#/.42/,

$0-

$2)6%2-/.)4/2

,).%$2)6%2

,).%2%#%)6%2

-4)0

-2).'

CS61575

CS61574A

#3"

&2!-%2

#)2#5)4

*)44%2

!44%.5!4/2

42!.3-)4

42!.3&/2-%2

2%#%)6%

42!.3&/2-%2

2%#%)6%

42!.3&/2-%2

22).'

24)0

!)3

$%4%#4

*)44%2

!44%.5!4/2

,).%

2%#%)6%2

Figure 7. Overview of Operating Modes

CS61574A CS61575

10 DS154F3

-XO¶

&21),'(17,$/

Transmitter

The transmitter takes digital T1 or E1 input data

and drives appropriately shaped bipolar pulses

onto a transmission line. The transmit data (TPOS

& TNEG or TDATA) is supplied synchronously

and sampled on the falling edge of the input

clock, TCLK.

Either T1 (DSX-1 or Network Interface) or E1

CCITT G.703 pulse shapes may be selected.

Pulse shaping and signal level are controlled by

"line length select" inputs as shown in Table 3.

The CS61575 and CS61574A line drivers are de-

signed to drive a 75 Ω equivalent load.

For E1 applications, the CS61574A and CS61575

drivers provide 14 dB of return loss during the

transmission of both marks and spaces. This im-

proves signal quality by minimizing reflections

off the transmitter. Similar levels of return loss

are provided for T1 applications.

For T1 DSX-1 applications, line lengths from 0 to

655 feet (as measured from the transmitter to the

DSX-1 cross connect) may be selected. The five

partition arrangement in Table 3 meets ANSI

T1.102 and AT&T CB-119 requirements when

using #22 ABAM cable. A typical output pulse is

shown in Figure 8. These pulse settings can also

be used to meet CCITT pulse shape requirements

for 1.544 MHz operation.

For T1 Network Interface applications, two addi-

tional options are provided. Note that the optimal

pulse width for Part 68 (324 ns) is narrower than

the optimal pulse width for DSX-1 (350 ns). The

CS61575 and CS61574A automatically adjusts

the pulse width based upon the "line length" se-

lection made.











   

4)-%NANOSECONDS

/54054

05,3%3(!0%

./2-!,):%$

!-0,)45$%

!.3)4)

!44#"

30%#)&)#!4)/.3

Figure 8. Typical Pulse Shape at DSX-1 Cross Connect

-/$%

&5.#4)/. 0). (!2$7!2%

%84%.$%$

(!2$7!2%

(/34

42!.3-)44%2

40/3 4$!4! 40/3

4.%'

4#/$% 4.%'

2%#%)6%2$0-

 2.%' "06 2.%'

20/3 2$!4! 20/3

 $0- !)3 $0-

 -4)0

2#/$% -4)0

 -2).'  -2).'

#/.42/,

 

0#3 

 ,%. ,%.

).4

 ,%. ,%. 3$)

 ,%. ,%. 3$/

 2,//0 2,//0

 ,,//0 ,,//0 3#,+

  4!/ 3 4!/ 3 # , + %

Table 2. Pin Definitions

LEN2 LEN1 LEN0 Option Selected Application

   &%%4

$38

!"!-

!44"

OR#

   &%%4

   &%%4

   &%%4

   &%%4



Ω

Ω

%

##)44'

   !44#" 2EPEATER

   &##0!24/04! .ETWORK

)NTERFACE

 !.3)4

Table 3. Line Length Selection

CS61574A CS61575

DS154F3 11

-XO¶

&21),'(17,$/

The E1 G.703 pulse shape is supported with line

length selection LEN2/1/0=0/0/0. The pulse

width will meet the G.703 pulse shape template

shown in Figure 9, and specified in Table 4.

The CS61574A and CS61575 will detect a static

TCLK, and will force TTIP and TRING low to

prevent transmission when data is not present.

When any transmit control pin (TAOS, LEN0-2

or LLOOP) is toggled, the transmitter outputs

will require approximately 22 bit periods to stabi-

lize. The transmitter will take longer to stabilize

when RLOOP is selected because the timing cir-

cuitry must adjust to the new frequency.

Transmit All Ones Select

The transmitter provides for all ones insertion at

the frequency of TCLK. Transmit all ones is se-

lected when TAOS goes high, and causes

continuous ones to be transmitted on the line

(TTIP and TRING). In this mode, the TPOS and

TNEG (or TDATA) inputs are ignored. If Remote

Loopback is in effect, any TAOS request will be

ignored.

Receiver

The receiver extracts data and clock from an AMI

(Alternate Mark Inversion) coded signal and out-

puts clock and synchronized data. The receiver is

sensitive to signals over the entire range of

ABAM cable lengths and requires no equalization

or ALBO (Automatic Line Build Out) circuits.

The signal is received on both ends of a center-

tapped, center-grounded transformer. The

transformer is center tapped on the IC side. The

clock and data recovery circuit exceeds the jitter

tolerance specifications of Publications 43802,

43801, AT&T 62411, TR-TSY-000170, and

CCITT REC. G.823.

NS

NS

NS

NS

NS

.OMINAL0ULSE





















0ERCENTOF

NOMINAL

PEAK

VOLTAGE

Figure 9. Mask of the Pulse at the 2048 kbps Interface

&ORC OAXIALC ABLE

ΩL OAD AND

TRANSFORMERSP ECIFIED

IN!PPLICATION3ECTION

&OR SHIELDEDTWIS TED

PAIR ΩL OADAND

TRANSFORMERSP ECIFIED

IN!PPLICATION3ECTION

.OMINALPEAKVOLTAGEOFAMARKPULSE 6 6

0EAKVOLTAGEOFASPACENOPULSE

±6 ±6

.OMINALPULSEWIDTH NS

2ATIOOFTHEAMPLITUDESOFPOSITIVEANDNEGATIVE

PULSESATTHECENTEROFTHEPULSEINTERVAL

TO

2ATIO OFT HE WIDTHS OFPOS ITIVEAND  NEGATIVE

PULSESATTHENOMINALHALFAMPLITUDE

TO

 7HENCONFIGUREDWITHAμ&NONPOLARIZEDCAPACITORINSERIESWITHTHE48TRANSFORMER

PRIMARYASSHOWNIN&IGURES!!AND!

Table 4. CCITT G.703 Specifications

CS61574A CS61575

12 DS154F3

-XO¶

&21),'(17,$/

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P30 P31-P33 P34-P34

CS61574A-IL1Z

Mfr. #:

Buy CS61574A-IL1Z

Manufacturer:

Cirrus Logic

Description:

Telecom Interface ICs IC T1/E1 Ln Intrfc UnitF/Stratum-4 apps

Lifecycle:

New from this manufacturer.

Delivery:

DHL FedEx Ups TNT EMS

Payment:

T/T Paypal Visa MoneyGram Western Union

CS61574A-IL1Z

CS61574A-IL1Z

Products related to this Datasheet