DS26518GN+ Maxim Integrated Products, DS26518GN+ Datasheet - Page 88
DS26518GN+
Manufacturer Part Number
DS26518GN+
Description
IC TXRX T1/E1/J1 8PORT 256-CSBGA
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Specifications of DS26518GN+
Number Of Drivers/receivers
8/8
Protocol
T1/E1/J1
Voltage - Supply
3.135 V ~ 3.465 V
Mounting Type
Surface Mount
Package / Case
256-CSBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 88 of 312
- Download datasheet (3Mb)
9.12.2 Transmitter
NRZ data arrives from the framer transmitter; the data is encoded with HDB3 or B8ZS or AMI. The encoded data
passes through a jitter attenuator if it is enabled for the transmit path. A digital sequencer and DAC are used to
generate transmit waveforms compliant with T1.102 and G.703 pulse templates.
A line driver is used to drive an internal matched impedance circuit for provision of 75Ω, 100Ω, 110Ω, and 120Ω
terminations. A 560pF capacitor should be placed between TTIPn and TRINGn for each transmitter for proper
operation, as noted in
some E1 applications) via a 1:2 step-up transformer. In order for the device to create the proper waveforms, the
transformer used must meet the specifications listed in
2.048MHz for E1 or 1.544MHz for T1/J1 operation.
The DS26518 drivers have a short-circuit and open-circuit detection driver-fail monitor. The TXENABLE pin can
high impedance the transmitter outputs for protection switching. The individual transmitters can also be placed in
high impedance through register settings. The DS26518 also has functionality for powering down the transmitters
individually. The relevant telecommunications specification compliance is shown in
Table 9-41. Telecommunications Specification Compliance for DS26518 Transmitters
Table 9-42. Transformer Specifications
Turns Ratio 3.3V Applications
Primary Inductance
Leakage Inductance
Intertwining Capacitance
Transmit Transformer DC
Resistance
Receive Transformer DC
Resistance
Transmission and Return Loss Compliance
T1 Telecom Pulse Template Compliance
T1 Telecom Pulse Template Compliance
Transmit Electrical Characteristics for E1
TRANSMITTER FUNCTION
SPECIFICATION
Figure
9-21. The transmitter couples to the E1 or T1 transmit twisted pair (or coaxial cable in
Primary (Device Side)
Secondary
Primary (Device Side)
Secondary
88 of 312
Table
TELECOMMUNICATIONS COMPLIANCE
1:1 (receive) and 1:2 (transmit) ±2%
9-42. The transmitter requires a transmit clock of
RECOMMENDED VALUE
600μH minimum
1.0μH maximum
40pF maximum
1.0Ω maximum
2.0Ω maximum
1.2Ω maximum
1.2Ω maximum
ANSI T1.403
ANSI T1.102
ITU-T G.703
Table
9-41.
Related parts for DS26518GN+
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
8-port T1/e1/j1 Transceiver
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
Part Number:
Description:
Ds26518 8-port T1/e1/j1 Transceiver
Manufacturer:
Maxim Integrated Products, Inc.
Part Number:
Description:
power light source LUXEON® Collimator
Manufacturer:
LUMILEDS [Lumileds Lighting Company]
Datasheet:
Part Number:
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
Part Number:
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
Part Number:
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products