MC145574AAER2 Freescale Semiconductor, MC145574AAER2 Datasheet - Page 16

• Manufacturer Part Number: MC145574AAER2
• Manufacturer: Freescale Semiconductor

Specifications of MC145574AAER2

• Number Of Line Interfaces: 1
• Control Interface: HDLC
• Lead Free Status / Rohs Status: Compliant

1–2
1.3
Section 7 contains pin descriptions of the MC145574. The pin descriptions differentiate between the
device configured for NT mode or TE mode of operation, and GCI and IDL2+SCP.
As mentioned previously, the MC145574 is used for the transmission of two 64 kbps B channels and
one 16 kbps D channel. Access to the B channels is determined by the network. The TEs gain access
to the D channel in accordance with CCITT I.430, ETSI ETS 300012, and ANSI T1.605 recommenda-
tions. A description of the D channel operation is contained in Section 11.
In addition to the 2B+D channels, the S/T transceiver has a multiframing capability. Multiframing is
a layer 1 signalling channel for use between the NT and the TE(s). The multiframing operation is de-
scribed in Section 12.
The MC145574 can be configured in several different operating modes depending on the application.
Section 13 describes all the possible configurations, whether in the NT or TE mode.
Section 16 describes how to interface the MC145574 to the S/T bus. Section 17 describes the various
power modes of operation. Section 18 contains electrical specifications, and Section 19 contains me-
chanical data relevant to the MC145574. Section 20 describes the differences between this data book
and the F57J4 mask version of the MC145574.
FEATURES
The features of the MC145574 are described below.
Conforms to CCITT I.430, ETSI ETS 300012, and ANSI T1.605 Specifications
Register Compatible With the First Generation MC145474/75
Exceeds Q.502 Jitter Requirements for TE Slave Applications
Pin Selectable NT or TE Modes of Operation
Incorporates the IDL2, With Timeslot Assigner
Industry Standard Microprocessor SCP
GCI Interface
Uses 2.5:1 Transformers for Transmit and Receive
Exceeds the Recommended Range of Operation in All Configurations
Complete Multiframing Capability Supported (SC1 – SC5 and Q Channel)
Optional B Channel Idle, Invert, or Exchange
Supports Full Range of S/T and IDL2 Loopbacks
Supports Transmit Power–Down, Listening, and Absolute Minimum Power Modes
Supports Crystal or External Clock Input Mode
NT Star and NT Terminal Modes Supported
Low Power Consumption
Compatible with 3 V Devices
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
MC145574
MOTOROLA