XRT94L33IB-L Exar Corporation, XRT94L33IB-L Datasheet - Page 107

• Manufacturer Part Number: XRT94L33IB-L
• Description: IC MAPPER DS3/E3/STS-1 504TBGA
• Manufacturer: Exar Corporation

Specifications of XRT94L33IB-L

• Applications: Network Switches
• Interface: Bus
• Voltage - Supply: 3.14 V ~ 3.47 V
• Package / Case: 504-LBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

xr
3-CHANNEL DS3/E3/STS-1 TO STS-3/STM-1 MAPPER IC DATA SHEET
G2
N1
N2
K4
J3
J2
FL_TSTCLK
Test Mode
VDCTST1
VDCTST2
ANALOG
SFM
O
O
O
O
I
I
ANALOG
ANALOG
ANALOG
CMOS
TTL
TTL
Single Frequency Mode (SFM) Select:
This input pin permits the user to configure the three Jitter
Attenuator blocks within the XRT94L33 to operate in the Single-
Frequency Mode (SFM). If the XRT94L33 has been configured
to operate in the SFM Mode, then the user only needs to supply
a 12.288MHz clock signal to the REFCLK51 input pin. In this
case, the user does not need to supply a 44.736MHz clock
signal to the REFCLK45 input pin, nor a 34.368MHz clock signal
to the REFCLK34 input pin.
XRT94L33) will internally synthesize the appropriate 44.736MHz,
34.368MHz or 51.84MHz clock signals, and will route these
signals to the appropriate channels (within the chip) depending
upon the data rate that they are configured to operate in.
Setting this input pin to a logic “LOW” disables the Single-
Frequency Mode. In this mode, the user must supply all of the
appropriate frequencies to the REFCLK34, REFCLK45 and
REFCLK51 input pins.
Setting this input pin to a logic “HIGH” configures the XRT94L33
to operate in the Single-Frequency Mode.
Test Mode Input Pin:
User should connect this input pin “LOW” for normal operation.
JA Testing Clock:
This pin is used for JA testing purposes.
Analog Output Pin:
This output analog pin is used for testing purposes.
DC Test Pin:
This pin is used for internal DC test, for example, it can be used
to test for DC current, DC voltage.
DC Test Pin:
This pin is used for internal DC test, for example, it can be used
to test for DC current, DC voltage.
107
The SFM PLL (within the
XRT94L33
Rev.1.2.0.