DS21348G+ Maxim Integrated Products, DS21348G+ Datasheet - Page 18

• Manufacturer Part Number: DS21348G+
• Description: IC LIU T1/E1/J1 3.3V 49-BGA
• Manufacturer: Maxim Integrated Products
• Type: Line Interface Units (LIUs)r

Specifications of DS21348G+

• Number Of Drivers/receivers: 1/1
• Protocol: T1/E1/J1
• Voltage - Supply: 3.135 V ~ 3.465 V
• Mounting Type: Surface Mount
• Package / Case: 49-CSBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 2-7. Pin Descriptions in Hardware Mode (Sorted By Pin Name,
DS21348T Pin Numbering)
BIS0/BIS1
L0/L1/L2
JAMUX
LOOP0/
BPCLK
LOOP1
NAME
HRST
HBE
EGL
CES
DJA
ETS
JAS
32/33
16/17
7/6/5
PIN
31
29
12
11
10
8
1
2
9
I/O
O
I
I
I
I
I
I
I
I
I
I
I
Bus Interface Select Bits 0 and 1. Used to select bus interface
option. BIS0 = 1 and BIS1 = 1 selects hardware mode.
Backplane Clock. 16.384MHz output.
Receive and Transmit Clock Edge Select. Selects which RCLK
edge to update RPOS and RNEG and which TCLK edge to sample
TPOS and TNEG.
0 = update RNEG/RPOS on rising edge of RCLK; sample
TPOS/TNEG on falling edge of TCLK
1 = update RNEG/RPOS on falling edge of RCLK; sample
TPOS/TNEG on rising edge of TCLK
Disable Jitter Attenuator.
0 = jitter attenuator enabled
1 = jitter attenuator disabled
Receive Equalizer Gain Limit. This pin controls the sensitivity of
the receive equalizer.
EGL
0 = -12dB (short haul)
1 = -43dB (long haul)
EGL
0 = -36dB (long haul)
1 = -30dB (limited long haul)
E1/T1 Select.
0 = E1
1 = T1
Receive and Transmit HDB3/B8ZS Enable
0 = enable HDB3 (E1)/B8ZS (T1)
1 = disable HDB3 (E1)/B8ZS (T1)
Hardware Reset. Bringing HRST low will reset the DS21348.
Jitter Attenuator Mux. Controls the source for JACLK.
See
MCLK = 2.048MHz
MCLK = 2.048MHz
MCLK = 1.544MHz
Jitter Attenuator Select
0 = place the jitter attenuator on the receive side
1 = place the jitter attenuator on the transmit side
Transmit LIU Waveshape Select Bits 0 and 1 [H/W Mode].
These inputs determine the waveshape of the transmitter
and
Loopback Select Bits 0 and 1 [H/W Mode]. These inputs
determine the active loopback mode (if any). See
E1 (ETS = 0)
T1 (ETS = 1)
Figure 1-1
Table
E1 (ETS = 0)
T1 (ETS = 1)
7-2.
18 of 76
and
Table
JAMUX
2-13.
0
1
0
FUNCTION
Table
2-8.
(Table 7-1