DS21552L+ Maxim Integrated Products, DS21552L+ Datasheet - Page 85
![IC TXRX T1 1-CHIP 5V 100-LQFP](/photos/6/82/68291/406-100-lqfp_sml.jpg)
DS21552L+
Manufacturer Part Number
DS21552L+
Description
IC TXRX T1 1-CHIP 5V 100-LQFP
Manufacturer
Maxim Integrated Products
Datasheet
1.DS21352L.pdf
(137 pages)
Specifications of DS21552L+
Function
Single-Chip Transceiver
Interface
E1, HDLC, J1, T1
Number Of Circuits
1
Voltage - Supply
4.75 V ~ 5.25 V
Current - Supply
75mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
100-LQFP
Includes
DSX-1 and CSU Line Build-Out Generator, HDLC Controller, In-Band Loop Code Generator and Detector
Product
Framer
Number Of Transceivers
1
Data Rate
64 Kbps
Supply Voltage (max)
3.465 V
Supply Voltage (min)
3.135 V
Supply Current (max)
75 mA (Typ)
Maximum Operating Temperature
+ 70 C
Minimum Operating Temperature
0 C
Mounting Style
SMD/SMT
Ic Interface Type
Parallel, Serial
Supply Voltage Range
4.75V To 5.25V
Operating Temperature Range
0°C To +70°C
Digital Ic Case Style
LQFP
No. Of Pins
100
Filter Terminals
SMD
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power (watts)
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Figure 16-1 EXTERNAL ANALOG CONNECTIONS
Table 16-2 TRANSMIT TRANSFORMER SELECTION
DEVICE
DS21552
DS21352
See separate application note on line interface design criteria for full details.
NOTES:
1. Resistor values are +/-1%.
2. The Rt resistors are used to protect the device from over–voltage.
3. See the Separate Application Note for details on how to construct a protected interface.
4. Normally a TTL level clock is applied MCLK and the XTAL pin is left as an NC. Optionally a crystal can be applied across
the MCLK and XTALD pins.
Table 16-3 TRANSFORMER SPECIFICATIONS
SPECIFICATION
Turns Ratio DS21352
Turns Ratio DS21552
Primary Inductance
Leakage Inductance
Intertwining Capacitance
DC Resistance
T1 Transmit
T1 Receive
Line
Line
(see table below)
1 : 1
N : 1
TRANSFORMER
1.15 : 1
1.36 : 1
2 : 1
0.1uF
Rt
Rt
50
RECOMMENDED VALUE
1:1(receive) and1:2(transmit) 5%
1:1(receive) and1:1.15 or1:1.36(transmit) 5%
600mH minimum
1.0mH maximum
40 pF maximum
1.2 Ohms maximum
polarized)
0.47uF
85 of 137
(non-
50
TTIP
TRING
RTIP
RRING
DS21352 / 552
RESISTOR Rt
0 ohms Ideal, 2.2 ohms max
4.7 ohms Ideal
0 ohms
XTALD
MCLK
DVDD
RVDD
DVSS
TVDD
RVSS
TVSS
0.01uF
DS21352/DS21552
0.1uF
0.1uF
0.1uF
NC
1.544MHz
VDD
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