Details, datasheet, quote on part number: STLC3170
PartSTLC3170
Category
Description
CompanyN.A.
DatasheetDownload STLC3170 datasheet
  

 

Features, Applications

SUBSCRIBER LINE INTERFACE CODEC FILTER, COFISLIC

Single chip CODEC and FILTER including all LOW-VOLTAGE SLIC functions. Advanced 12V BJT, 5V CMOS 0.8um technology. Low external component count. Over-sampling A/D and D/A conversion. No functional trimming or adjustments required. Serves a wide range of specifications; i.e. ITUT, LSSGR. A-law, and µ-law PCM and Linear voice coding, sw selectable GCI compatible interface. Programmable Digital-Filters for impedancematching, hybrid-balance, frequency-response and gain. Programmable Feeding-Resistance x 400) and current-limiting (0-69.3mA). Programmable voltage-drop according to transmission needs. 12kHz/16kHz Teletax Generation with Programmable Level 0-10 Vrms in 40mV steps including shaping and filtering. Integrated Ring-Generator with Zero-Crossing. Programmable frequency from to 60Hz, programmable level to 85Vrms, Integrated auto ring-trip. Signalling functions ON/OFF - Hook, Gnd-key with filter and Programmable persistence check. Advanced test capabilities: On-board line tests and circuit tests. Signalling tests for meterpulse TTX and Ringing. Tone generator for circuit test. 3 Loop-back paths. Three operating conditions: Power Down, Active, Ringing. Off-hook programmable threshold-level in each of these conditions. Interface to High-Voltage SLIC to select modes, provide hard or soft Polarity-Reversal and sense L3000S, STLC3170) High Thermal condition. On-hook transmission capability. Selectable 2/4MHz backplane clock. Standard PLCC 44 package.

On chip Line-card identification. DESCRIPTION The subscriber line codec-filter, STLC3040, is fabricated in BiCMOS (12V bipolar / 5V CMOS) technology. It uses Digital-Signal-Processing(DSP) to implement central-office telephone interface features: DC-feed, Supervision, PCMCodec-Filter, Ring, Teletax metering (TTX) and Test functions. The STLC3040 is fully programmable and needs few external resistors and capacitors. The STLC3040 interfaces the subscriber's line via the High-Voltage (HV) L3000S, STLC3170) device and the central-office back1/49

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

DESCRIPTION (continued) plane via a GCI compatible interface (see fig.2). The GCI handles all STLC3040 control and voice channel. The STLC3040 processes the transversal linecurrent sensed by the L3000S, STLC3170) Line Driver Circuit and generates voltage-drive to the line via the L3000S, STLC3170), thus synthetizing the impedances required by various world administrations. Line impedances as well as the two-to-four wire conversion synthesis are software programmable. Also Transmit (Tx) and Receive(Rx) AC frequency­response, determined by DSP-filters, guarantee voice-band flat-response. Tx and Rx Gains are programmable as well. Digitized voice can be encoded on A-law or u-law. The DC characteristic is obtained by selecting limit-current value, DC-feed resistance X 50 steps) and Drop-voltage. It also permits On-hook transmission and TTX pulse injection with filtering and shaping. TTX metering pulse generation or 16kHz) has programmable amplitude to 10 Vrms. Off-hook detection with programmable thresholds Figure 2: Functional Diagram.

FSC DCL DD A=-20 Iline IT ANALOG FRONT END HV CONTROL IL PDO IT IL REF C2 C1 VBIM CDVB CURRENT SENSORS GCI INT. DIGITAL SIGNAL PROCESSOR VOUT VIN A=20 RING RP2 TIP RP1 ITIP

is possible in all operating modes as described in section 4. Ring-signal with zero-crossing start/stop injection is generated on chip with programmable frequency and amplitude. In addition, when Ringtrip is detected, the Ring-signal is automatically disconnected at the next zero-crossing. Power consumption is kept low by providing a "Power-Down" mode where the HV-SLIC is switched off (Power Denial). A set of internal resistors connected to the line allows Off-hook detection in this mode. Overall power dissipation is around 50mW (max.) in Power Down mode. Several testing features are included in the STLC3040, both for self-test and to test line leakage, capacitance..etc, thus saving on test equipment and relays. Measured DC quantities are digitized and sent via the B1 voice channel to the backplane. With proper software selection each signal can be modulated a 1KHz carrier before being sent to B1 voice channel. Programmable linear code, software selectable, boosts the calculation resolution. Sigma-Delta converters (ASD: Analog, DSD: Digital) make the conversion independent of technology parameters (fig. 3).

STLC3040 PIN DESCRIPTION (This list is grouped according to Function)

N. Symbol Type POWER SUPPLY 1 DGND PS 2 VDD PS 27 AGND PS 33 VEE PS 34 VCC PS 2/49 Description Digital Ground +5V Digital Supply Voltage Analog Ground -5V Analog Supply Voltage +5V Analog Supply Voltage

N. GCI 40 Symbol SEL24 Type DI Description Select Clock Frequency for GCI Interface 2MHz/4MHz not affecting the data rate = 0, Clock Frequency = 1, Clock Frequency = 4096KHz GCI Select Time Slot Identifier Pins Frame Sync 8kHz GCI Interface Master Data Clock GCI Interface Data Down link GCI Interface Data Up link GCI Interface (Open Drain Driver) State Control Signal 1. Combination of C1 and C2 defines L3000S, STLC3170) operating mode. Current sense for thermal indication. State Control Signal 2. Combination of C1 and C2 defines L3000S, STLC3170) operating mode. Power down output. Proper bias current is provided toHV STLC3170) by this pin. When the current is 0 the L3000S, STLC3170) goes in Power Denial (high impedance). Proper combinations of PDO with C1, C2 set additional operating modes for STLC3170 High Voltage Interface. Comparator Input. These are inputs of the comparator that senses the line voltage in Power Denial allowing Off/Hook detection in this mode. Longitudinal Line-Current input IL = (ITIP - IRING)/100. Transversal Line-Current input IT=(ITIP + IRING)/100. Battery image monitor. Output feeding the line voltage (DC, AC, RING, TTX) through H.V. L3000S, STLC3170).

I/O IO1, IO2 DI/O Programmable GCI controlled I/O. O1 DO Digital output written via GCI. I1 DI Digital input read via GCI. MISCELLANEOUS FUNCTION 29 EXT DI External Ring Sync. Input. MR DI Master Reset Input. Active High. The STLC3040 is forced in Loop-open and internal registers are preset to default values. 31,32 IDL, IDM AI Identification Code Signals, M+L ternary digits 35 IDH DI H most significant bit, L least significant bit. 14 CAP AI/O Capacitor must be connected to this pin. Its value defines the Soft Battery Reversal slope. 16 RAC AI/O AC-Synthesis Reference Resistor. 20 ACDC AI/O AC/DC Line Split. Scaled line-current output, DC feedback input. 21 CAC AI Splitter Capacitor. Scaled AC line-current input. 22 RDC AI DC-Synthesis Reference Resistor. 23 REF AI/O Reference Voltage Output. A resistor on this pin sets the internal reference current. UNUSED 18,24 STR0,STR1 DI/O Reserved for testing, must be shorted to DGND. SIR0, SIR1 DI/O Must be left open. 37 SIR2 DI/O Can be left open Type AI AO AI/O Description Analog Input Analog Output Analog Input/Output Type DI PS DI/O Description Digital Input Chip Power/Ground Digital Input/Output Type DO OD Description Digital Output Open Drain Output


 

Some Part number from the same manufacture
STLC5412
STLC5432
STLC5460
STLC5464
STLC7545
STLC7546
STLC7549
STM1645
STM326-2
STM51004
STM51007
STM81004
STM81007
STM915
STM930
STM961
STMN-2-C-0401240AC7H Timer Delay on Energise
STP15N05
STP15N06
STP16L
STP21N05
 
0-C     D-L     M-R     S-Z