STLC5445 ,QUAD LINE FEED CONTROLLERSTLC5445QUAD LINE FEED CONTROLLER■ BATTERY VOLTAGE UP TO 120V■ SUPPLIES POWER FOR UP TO FOUR DIGITA ..
STLC5465B ,MULTI-HDLCWITH n x 64 SWITCHING MATRIX ASSOCIATEDTABLE OF CONTENTS (continued) PageV1 - MEMORY TIMING . . . . . . . . . . . . . . . . ..
STLC5466 ,64 CHANNEL-MULTI HDLC WITH N X 64KB/S SWITCHING MATRIX ASSOCIATEDSTLC546664 CHANNEL-MULTI HDLC WITHN X 64KB/S SWITCHING MATRIX ASSOCIATED■ 64 TX HDLCs with broadcas ..
STLC60133 ,XDSL LINE DRIVERSTLC60133XDSL LINE DRIVERPRELIMINARY DATA■ LOW NOISE : 4nV/ Hz■ HIGH PEAK OUTPUT CURRENT: 500 mA■ H ..
STLC60133TR ,XDSL LINE DRIVERSTLC60133XDSL LINE DRIVERPRELIMINARY DATA■ LOW NOISE : 4nV/ Hz■ HIGH PEAK OUTPUT CURRENT: 500 mA■ H ..
STLC7550 ,LOW POWER LOW VOLTAGE ANALOG FRONT ENDapplications STLC7550 ispowered nominally at 3V only.1/17November 1998STLC7550PIN CONNECTIONS (TQF ..
SY10EL07ZG , 2-INPUT XOR/XNOR
SY10EL07ZG , 2-INPUT XOR/XNOR
SY10EL07ZI , 2-INPUT XOR/XNOR
SY10EL07ZI , 2-INPUT XOR/XNOR
SY10EL11V , 5V/3.3V 1:2 DIFFERENTIAL FANOUT BUFFER
SY10EL11VZG , 5V/3.3V 1:2 DIFFERENTIAL FANOUT BUFFER
STLC5445
QUAD LINE FEED CONTROLLER
STLC5445 BATTERY VOLTAGE UP TO 120V SUPPLIES POWER FOR UP TO FOUR
DIGITAL TELEPHONE LINES PROGRAMMABLE CURRENT LIMITING LONGITUDINAL CURRENT CANCELLATION ETSI ETR80 COMPLIANT OUTPUT CURRENT UP TO 140 mA STATUS CONDITION DETECTION FOR
EACH LINE AUTOMATIC THERMAL PROTECTION AUTO POWER ON SEQUENCE OUTPUT STAGE OPTIMIZED FOR MINIMAL
OUTPUT OVERVOLTAGE PROTECTION TWO EXTERNAL RELAY DRIVERS PER LINE PARALLEL OR MPI CONTROL INTERFACE HI-QUAD PACKAGE 64 PIN
DESCRIPTIONThe QUAD LINE FEED CONTROLLER provides a
power source for up to four U line interfaces. The
power source to the device is a local battery or a cen-
tralized regulated power supply. Each powered line is
individually controlled and monitored by the device
interface.
A MPI or a simple parallel interface can be selected
by a pin strap.
Each line can be individually powered and monitored:
therefore overload and faults can easily be detected
and localized even in a large system. The status con-
ditions detected by the device are: Current Overload,
Thermal Overload, Open Loop. If activated (by
means of a dedicated pin strap), a self generated
power on sequence avoids the thermal over stress
when a simultaneous power on has been requested
for more than one channel. The current limiting value
can globally be programmed for the four channels by
means of an external resistor. The device has two in-
tegrated relay drivers per line to drive the test relays
of the ISDN system.
QUAD LINE FEED CONTROLLER
STLC5445
BLOCK DIAGRAM
STLC5445
PIN CONNECTION (Top view)
PIN FUNCTION
STLC5445
PIN FUNCTION (continued)
STLC5445* Internal pull down to ground
PIN FUNCTION (continued)
STLC5445
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITION
STLC5445
ELECTRICAL CHARACTERISTCSUnless otherwise specified the below listed parameters' values are referred to the following conditions:
VBAT = –115V, VCC = 5V, Rlim = 53.6 kW, CODCn RC series = 100nF ±10% and 510Ω ±1%, normal temperature
range [0°C to 70°C]. The presence of an asterisk mark (*) indicates that the marked parameter must remain
within the specified tolerance in the extended temperature range [-40°C to 85°C].
STLC5445 Notes:1. Our characterizations show that in the range 15mA - 20mA the accuracy is ±20% over the 0°C - 70°C temperature range. The longitudinal component of the signal detected by the spectrum analyzer must have an RMS voltage value, in any 4kHz equiv-
alent bandwidth, averaged in any 1 second period, not greater of the specified value (–60dBV) over the 100Hz - 150kHz range
(for details see ETSI ETR80 and ANSI 601). All the output lines activated at a line current of 35mA; no current limitation condition. Rth(j-a) ≤ 20°C/W
Please note that, in order to assure the frequency stability of the output drivers, a 1μF capacitor must always
be connected between WAn and Wbn or, as shown in Fig. 6, immediately after the resistive protection elements
used in the actual application.
The RLIM value can be calculated starting from the value of the needed current limitation threshold ILIMT:
SWITCHING TIMING
Figure 1. LIM 2664 LIMIT
---------------=
ELECTRICAL CHARACTERISTICS (continued)
STLC5445
Figure 2.
STATIC CHARACTERISTICSUnless otherwise specified the below listed parameters values are referred to the following conditions: VCC = 5V, nor-
mal temperature range.
STLC5445
SWITCHING CHARACTERISTICS
MICROPROCESSOR WRITE / READ TIMING (refers to figures 3 and 4).Unless otherwise specified the below listed parameters’ values are referred to the following conditions:
VCC=5V, normal temperature range.
STLC5445
Figure 3. Microprocessor WRITE timingNotes:1. If tCLWL is negative tWLWH is measured from CS_ rather than fromWR_. If tWHCH is negative, tWHWL, tWLWH, tDAWH and tWHDZ are measured from CS_ rather than fromWR_.
The propagation delay from the writing of the T/I bit to the effect on the INT pin is approximately 1ms for both mask and enable operations.
Figure 4. Microprocessor READ timingNotes:1. If tCLRL is negative, tRHRL, tRLRH, tAZRL, and tRLDA are measured from CS_ rather than RD_. If tRHCH is negative, tRHRL, tRLRH and tRHDZ are measured from CS_ rather than RD_.
When a read from the LER immediately follows a write to the LER a minimum of 1ms is required between these operations
STLC5445
Figure 5. Typical Application Circuit
External Component List
