DS26303G-120 MAXIM [Maxim Integrated Products], DS26303G-120 Datasheet - Page 14

• Manufacturer Part Number: DS26303G-120
• Description: 3.3V, E1/T1/J1, Short-Haul, Octal Line Interface Unit
• Manufacturer: MAXIM [Maxim Integrated Products]

scan_mode
MODESEL
TIMPRM
scan_en
MOTEL/
RLOS8/
NAME
CODE
CLKA
MUX/
eLQFP
140
93
94
11
43
88
PIN
PBGA
G13
H13
H12
E4
E2
K2
HARDWARE AND PORT OPERATION
tri-state
(pulled
to V
(pulled
V
TYPE
DD
I/O
O,
to
I
I
I
I
/2)
SS
)
DS26303: 3.3V, T1/E1/J1, Short-Haul, Octal Line Interface Unit
Loss-of-Signal Output/Scan Enable
RLOS8: See RLOS1 pin description.
scan_en: Enables scan during test when pin scan_mode is high.
Clock A. This output becomes a programmable clock output when
enabled by register MC. For frequency options see register CCR.
This option is not available in hardware mode. If this option is not
used, the pin should be left unconnected.
Scan Mode. Selects scan mode when high. If not used, this pin
should be left unconnected or grounded.
Mode Selection. This pin is used to select the control mode of the
DS26303.
Low → Hardware Mode
V
High → Parallel Host Mode
Note: When left unconnected, do not route signals with fast
transitions near MODESEL. This practice minimizes capacitive
coupling.
Multiplexed/Nonmultiplexed Select Pin/
Transmit Impedance/Receive Impedance Match
MUX: In host mode with a parallel port, this pin is used to select
multiplexed address and data operation or separate address and
data. When mux is a high, multiplexed address and data is used.
TIMPRM: In hardware mode, this pin selects the internal transmit
termination impedance and receive impedance match for E1 mode
and T1/J1 mode.
0 → 75W for E1 mode or 100W for T1 mode
1 → 120W for E1 mode or 110W for J1 mode
Note: If the part number ends with 120, the default is 120W when
low and 75W when high for El mode only.
Motorola Intel Select/Code
MOTEL: When in parallel host mode, this pin selects Motorola
mode when low and Intel mode when high.
CODE: In hardware mode, AMI encoding/decoding is selected
when the pin is high for all the LIUs. When the pin is low, B8ZS is
selected for T1 mode and HDB3 for E1 mode for all the LIUs.
14 of 97
DD
/2 → Serial Host Mode
FUNCTION