ST952 D.A.A. LINE INTERFACE TQFP32 (7 x 7 x 1.4mm) (Thin Plastic Quad Flat Pack) ORDER CODE : ST952TQF7 If CLID external transistor switch is enabled, a limited amount of current, less than 1mA, is drawn from the line. In off-hook state, ST952 DC voltage, 4V at a 20mA line current, allows to interface with most of public networks in the world. The return loss is externally adjustable to real or complex impedance. In case of a wrong connection in a digital phone line, ST952 detects the over current value and sends to ST75951 an alert signal through the capacitive isolation barrier. Before starting a line connection, ST952 is abled to check if the line is used by an other terminal connected on the same telephone line. APPLICATIONS MODEMS UP TO V.34, 33.6KBPS AND 56Kbps PCMCIA CARDS FAX MACHINES PERSONAL DIGITAL ASSISTANTS ANSWERING MACHINES HIGH FEATURE PHONES WEBPHONES AND SET TOP BOXES DESCRIPTION ST952 is a line interface designed to implement Modem application up to 56Kbps and Voice applications. ST952 interfaces between telephone line and capacitive isolation barrier. A complete D.A.A. is made with ST75951 which interfaces between capacitive isolation barrier and the DSP or HSP signals. IDC COM OHC NC NC 8 LIM1 18 7 LIM2 VDR 19 6 TOFF LINE 20 5 D6 IDG 21 4 D5 IDI 22 3 RIN LINI 23 2 D4 GAIN 24 1 D3 December 1998 This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice. 952-01.EPS LCOM D2 D1 25 26 27 28 29 30 31 32 NC It incorporates Krypton Isolation Inc. patented silicon DAA technology. The ring burst signal is detected by ST952 and is sent to ST75951 through the capacitive isolation barrier. Using the control signals given by ST75951, through the capacitive isolation barrier, ST952 activates the off-hook or the CLID external transistor switch. 17 SET NC Ring 952-02.EPS ST952 TER1 AOUT Digital Signals IREF 16 15 14 13 12 11 10 9 Tip ST75951 VDREF TER2 PIN CONNECTIONS AIN . .. . .. .. .. . HOOK SWITCH DRIVER RING INDICATOR LINE INTERFACE - DC TERMINATION (4V AT 20mA) - 2W/4W HYBRID CONVERTER - FLAT FREQUENCY RESPONSE DOWN TO 10Hz FOR 56Kps MODEM INTERFACE WITH CAPACITIVE ISOLATION BARRIER CALLER ID INTERFACE DIGITAL PHONE LINE OR OVER LOOP CURRENT LIMIT DETECT PHONE LINE IN USE CHECK LCOM .. . PRELIMINARY DATA 1/12 ST952 PIN LIST Pin Number Name Type 1 D3 Output Isolation Signal Output 2 D4 Output Isolation Signal Output 3 RIN Input Ring Signal Input 4 D5 Input Isolation Control Signal Input Isolation Control Signal Input 5 D6 Input 6 TOFF Supply 7 LIM2 Input Loop Current Limiter Control 8 LIM1 Output Loop Current Limiter Control 9 IDC Output Caller ID Control Output 10 COM Output Off-hook & ID Commun Output 11 OHC Output 12 N.C. - Not Connected 13 N.C. - Not Connected Internal Reference Supply Off-hook Control Output 14 IREF Input 15 VDREF Supply Internal Reference Pin 16 TER2 Output Current Regulator Control Feedback 17 TER1 Output Current Regulator Control Output 18 SET Input 19 VDR Supply Line DC Voltage Regulator 20 LINE Output Line AC Signal Output 21 IDG Input Current Reference Setting Current Regulator Filter Caller ID Voltage Reference Input 22 IDI Input Caller ID Signal Input 23 LINI Input Line AC Signal Input 24 GAIN Input Transmit Gain / Trans-Hybrid Loss Set 25 LCOM Ground 26 AIN Input 27 AOUT Output 28 N.C. - Not Connected 29 N.C. - Not Connected 30 D1 Input 31 D2 Input 32 LCOM Ground Note : Pins 12, 13, 28 and 29 must be left opened. 2/12 Description Line Side Common Ground Analog Transmit Signal Input Analog Transmit Signal Output Isolation Signal Input Line Side Common Ground 952-01.TBL Isolation Signal Input ST952 PIN DESCRIPTION D1 - D2 These pins input the AC signal modulated at Fmod coming from ST75951 through the capacitive isolation barrier. RIN During the ring burst, a 1MHz oscillator is powered on this pin and a 6VPP/1MHz signal is sent on D3 and D4 to indicate the ring presence. D3 - D4 These pins output the AC signal modulated at Fmod in off-hook mode and at Fmod/2 in CLID mode to ST75951 through the capacitive isolation barrier. In ring mode, these pins output the ring information, a differential 6VPP/1MHz signal. IREF Internal reference current source setting, R4 must be equal to 82kΩ. VDR Power supply for the transmit and receive paths in Off-Hook mode. D5 - D6 These control pins input a 5VPP/Fmod signal coming from ST75951 through the capacitive isolation barrier. These signals control the off-hook and CLID external transistor switches and are sent to the internal transmit demodulator and receive modulator. Off-hook mode is enabled with a 5VPP/Fmod signal sent on D5 and D6 inputs with an opposite phase (see Figure 1). With a dedicated application it is possible to reduce the input level to 3VPP. CLID mode is enabled with a 5VPP/Fmod signal sent on D5 input only (see Figure 2). With a dedicated application it is possible to reduce the input level to 3VPP. VDREF Internal resistor reference. SET Line gyrator AC/DC filter. OHC When D5 and D6 inputs a 5VPP/Fmod signal in opposite phase, this pin puts ON the hook switch external Q1/Q2 transistor stage. IDC When D5 input a 5VPP/Fmod signal, this pin puts ON the CLID external Q3/Q4 transistor stage. R2 limits the line current in CLID mode at 1mA max. Figure 1 5V Fmod LINE DC positive line connection and line AC signal output. LCOM Negative line connection. LINI Line AC signal input in off-hook mode. AIN - AOUT The transmit signal coming from AIN pin is injected in AOUT pin to the 2W/4W internal converter stage. The line echo is minimized if R3, connected between LINE and VDR pins is equal to 620Ω. GAIN R1 connected on this pin fixes the transmit gain. The R1 recommanded value, on a 600Ω AC line termination, is 82Ω. TER1 - TER2 These pins control the external Q5 transistor, in which the main part of the line current goes through to meet the line DC, V = f(IL), termination requirements. IDI Line AC signal input in CLID mode. IDG Power supply for the receive path in CLID mode. LIM1 - LIM2 200mA over current detection for device protection. TOFF Internal Reference Supply. Figure 2 D5 5V Fmod D6 3/12 952-04.EPS D6 5V Fmod 952-03.EPS D5 COM Commun output for off-hook and CLID external transistor stages 4/12 D6 D5 RIN D4 5 4 3 2 1 31 30 32 25 Fmod 10 11 9 8 7 CURRENT LIMITER 2W/4W CONVERTER & HYBRID LOW PASS FILTER LIM2 TOFF C9 6 CLID & OFF-HOOK SWITCH CONTROL RING DETECT Fmod HIGH PASS FILTER LIM1 952-05.EPS ST75951 D3 D2 D1 ST952 AOUT 16 27 C8 Output Amplifier 17 18 OFF-HOOK REFERENCE VOLTAGE CLID REFERENCE VOLTAGE 26 AIN 14 15 19 21 22 23 24 20 IREF VDREF VDR IDG IDI LINI R4 C5 C4 C3 R3 R2 C2 C1 R1 GAIN LINE Q2 Q1 Q3 R5 Q4 R7 R9 C7 Q5 R6 C6 R8 Ring Tip ST952 BLOCK DIAGRAM SET TER1 TER2 IDC OHC COM LCOM LCOM ST952 ABSOLUTE MAXIMUM RATING (AGND = DGND = 0V, all voltages with respect to 0V) VMLINE Parameter Value Unit 14 V Positive Line Voltage Continuous Toper Operating Temperature Tstg Storage Temperature 0, +70 °C -55, +150 °C 952-02.TBL Symbol Symbol Rth (j-a) Parameter Value Junction-ambient Thermal Resistance Max. Unit o 80 C/W 952-03T.BL THERMAL DATA ELECTRICAL CHARACTERISTICS (Tamb = 25oC, unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit DC AND AC TERMINATION (see Figure 3) VLINE Line Voltage IL = 20mA IL = 120mA ZLOSS Return Loss IL = 20mA, VLAC = -6dBV f = 200 to 4000Hz 24 -0.5 4.1 10.5 V V dB dB RECEIVE PATH (IL = 20mA, f = 1kHz, see Figure 4) Grx Receive Gain VLAC = 0dBV, VTAC = 0 Grf Receive Frequency Response VLAC = 0dBV, VTAC = 0 f = 200 to 3400Hz f = 50 to 200Hz VLAC = 0dBV, VTAC = 0 f = 150Hz f = 1000Hz Rxhd Receive 2nd/3th/4th Harmonic Distortion Thl Trans-Hybrid Loss VLAC = 0, VTAC = -6dBV, Fmod = 1.5MHz Rn Receive Noise Floor VLAC = VTAC = 0, f = 200-3400Hz, 100Hz BW 0 -0.1 -0.5 30 0.5 dB +0.1 +0.5 dB dB -79 -82 dBV dBV 35 dB -93 dBV TRANSMIT PATH (IL = 20mA, f = 1kHz, VLAC = 0, see Figure 4) Gtx Gtf Txhd Txmax Tn Transmit Gain VTAC = -6dBV -0.5 Transmit Frequency Response Transmit 2nd/3th/4th Harmonic Distortion VTAC = -6dBV, f = 200 to 4000Hz VTAC = -6dBV, Fmod = 1.5MHz -0.2 Max Line Drive Voltage Transmit Noise Floor VTAC = 0, f = 200-3400Hz, 100Hz BW 0 0.5 dB +0.2 dB -82 dBV 3 -93 VPP dBv POWER AND DC LOGIC INPUT (see Figure 5) ILINE Line Current ST952 Line Pin + Ic(Q5) VOFH Hook Switch Input D5 and D6 Input Active (Off-hook) Inactive (On-hook) D5 Input Active (CLID On) Inactive (On-hook) VCLID CLID Input 10 120 mA 2.7 5.25 0.8 V V 2.7 5.25 0.8 V V +1 dB 1 mA 8 V V GRID CLID Receive Gain ILID CLID Line Current VTAC = -15dBV -1 0 RING INDICATOR (see Figure 7) VRIOF VRION D3 & D4 Ring indicator D3 = D4 = 0 D3 = D4 = 3VPP 18 Note : D3 and D4 are complementary outputs. 5/12 952-04.TBL CALLER ID RECEIVE PATH (see Figure 6) 6/12 D6 D5 5 4 32 25 Fmod 10 11 9 8 7 CURRENT LIMITER LIM2 TOFF 100nF 6 CLID & OFF-HOOK SWITCH CONTROL RING DETECT 2W/4W CONVERTER & HYBRID LOW PASS FILTER LIM1 952-06.EPS VD6/1.5MHz VD5/1.5MHz 2 RIN 3 D4 1 Fmod HIGH PASS FILTER 16 27 AIN Output Amplifier 17 18 OFF-HOOK REFERENCE VOLTAGE CLID REFERENCE VOLTAGE 26 14 15 19 21 22 23 24 20 620W 47kW 1nF 1m F IREF 82kW 4.7m F VDREF 100nF VDR 47m F IDG IDI LINI GAIN LINE 82W D3 D2 31 D1 30 ST952 AOUT 1m F 47kW BC 547 BC 557 BC 557 BC 547 VACLINE BC 547 IL + IAC VLAC 100m F 600W ZLOSS = 20.log S1 closed : - ZLOSS measured VACLINE ZTER = IAC ZTER + 600 ZTER - 600 S1 opened : - VLINE at IL = 20 & 120mA IL S1 IAC ST952 Figure 3 : Test 1 39W 47kW TER1 SET TER2 IDC OHC COM LCOM LCOM D6 5 4 32 25 Fmod 10 11 9 8 7 CURRENT LIMITER LIM2 TOFF 100nF 6 CLID & OFF-HOOK SWITCH CONTROL RING DETECT 2W/4W CONVERTER & HYBRID LIM1 952-07.EPS 5V/1.5MHz D5 RIN 3 D4 2 1 Fmod LOW PASS FILTER 16 AIN Output Amplifier 17 18 OFF-HOOK REFERENCE VOLTAGE CLID REFERENCE VOLTAGE 26 14 15 19 21 22 23 24 20 620W 47kW 1nF 1m F IREF 82kW 4.7m F VDREF 100nF VDR 47m F IDG IDI LINI GAIN LINE BC 547 BC 547 VACLINE 47kW BC 557 BC 557 VRAC and VTAC = 0 VACLINE VACLINE and VLAC = 0 VTAC Gt = 20.log VLAC Gr = 20.log 100m F BC thl = 20.log VACLINE @ V = 0 LAC VRAC 547 20mA 5V/1.5MHz 1.5MHz DEMODULATOR 31 HIGH PASS FILTER 27 82W D3 D2 30 AOUT 600W VRAC VTAC 1.5MHz DEMODULATOR D1 ST952 1m F ST952 Figure 4 : Test 2 39W 47kW TER1 SET TER2 IDC OHC COM LCOM LCOM 7/12 8/12 D6 D5 5 4 32 25 Fmod 10 11 9 8 7 CURRENT LIMITER LIM2 TOFF LCOM 100nF 6 CLID & OFF-HOOK SWITCH CONTROL RING DETECT LIM1 952-08.EPS VD6/1.5MHz VD5/1.5MHz RIN 3 2 2W/4W CONVERTER & HYBRID LOW PASS FILTER 16 AIN Output Amplifier 17 18 OFF-HOOK REFERENCE VOLTAGE CLID REFERENCE VOLTAGE 26 14 15 19 21 22 23 24 20 620W 47kW 1nF 1m F IREF 82kW 4.7m F VDREF 100nF VDR 47m F IDG IDI LINI GAIN LINE 47kW BC 547 BC 557 BC 557 BC 547 BC 547 ILINE D4 1 Fmod HIGH PASS FILTER 27 82W D3 D2 31 D1 30 ST952 AOUT 1m F 100m F ST952 Figure 5 : Test 3 600W 39W 47kW SET TER1 TER2 IDC OHC COM LCOM 4 D6 5 D5 32 25 Fmod 10 11 9 8 7 CURRENT LIMITER LIM2 TOFF 100nF 6 CLID & OFF-HOOK SWITCH CONTROL RING DETECT 2W/4W CONVERTER & HYBRID LIM1 952-09.EPS 2 RIN 3 D4 1 16 Output Amplifier 17 18 OFF-HOOK REFERENCE VOLTAGE CLID REFERENCE VOLTAGE AIN 14 15 19 21 22 23 24 20 620W 47kW 1nF 1m F IREF 82kW 4.7m F VDREF 100nF VDR 47m F IDG IDI LINI GAIN LINE BC 547 BC 547 VACLINE 47kW BC 557 BC 557 BC 547 1mA VD5/1.5MHz 0.75MHz DEMODULATOR LOW PASS FILTER 26 82W VRAC Fmod HIGH PASS FILTER 27 VLAC Grid = 20.log 100m F 600W D3 D2 31 D1 30 ST952 AOUT 1m F VRAC VACLINE ST952 Figure 6 : Test 4 39W 47kW TER1 SET TER2 IDC OHC COM LCOM LCOM 9/12 ST952 Figure 7 : Test 5 1m F AOUT 27 26 AIN ST952 Output Amplifier D1 30 HIGH PASS FILTER D2 31 LOW PASS FILTER 20 2W/4W CONVERTER & HYBRID 23 24 BC 557 LINE GAIN 47kW 82W Fmod 1m F D3 1 RIN 3 22 RING DETECT CLID REFERENCE VOLTAGE 10kW Fmod 21 19 D6 5 10 11 9 16 17 18 15 14 VDR 47m F BC 547 BC 547 BC 547 VDREF 100nF IREF 82kW 4.7m F SET TER1 8 TER2 IDC OHC TOFF COM LCOM LCOM 7 LIM1 6 LIM2 32 25 OFF-HOOK REFERENCE VOLTAGE CURRENT LIMITER 47kW 39W CLID & OFF-HOOK SWITCH CONTROL IDG 1nF 620W Ur D5 4 IDI 47kW D4 2 BC 557 LINI For Ur = V1, no signal on D3/D4 For Ur = V2, 6VPP/1MHz on D3/D4 10/12 952-10.EPS 100nF ST952 TYPICAL APPLICATION (5V Supply on ST75951) 10W Tip 47nF 22kW SMTPA 270 D4 ST952 D5 1m F Q1 D6 47kW D7 23 LINI 13V Ring ST75951 82W 24 GAIN D1 30 35 D1 D2 31 34 D2 11 OHC Q2 47kW 10 COM Q5 17 TER1 Q3 16 TER2 3 1nF RIN D3 1 31 D3 D4 2 30 D4 20 LINE 620W 47kW 8 SCLK 2 FS 3 DIN 46 DOUT 47 RESET 43 PWRDWN 11 22 IDI HC1 D5 4 27 D5 D6 5 26 D6 LIM2 7 LIM1 8 P R O C E S S O R 9 21 IDG 9 IDC 47m F 19 VDR 15 VDREF 14 IREF 100nF 4.7m F 18 SET 82kW Q4 39W 47nF MCLK AOUT 27 1m F AIN 26 25 LCOM 32 LCOM 6 952-11.EPS 22kW TOFF 100nF 11/12 ST952 PACKAGE MECHANICAL DATA 32 PINS - PLASTIC THIN QUAD FLAT PACK (TQFP) A A2 e 32 A1 25 24 8 17 E3 E1 E B 1 0,10 mm .004 inch SEATING PLANE c Dimensions A A1 A2 B C D D1 D3 e E E1 E3 L L1 K Min. 0.05 1.35 0.30 0.09 0.45 Millimeters Typ. 1.40 0.37 9.00 7.00 5.60 0.80 9.00 7.00 5.60 0.60 1.00 Max. 1.60 0.15 1.45 0.45 0.20 0.75 Min. 0.002 0.053 0.012 0.004 0.018 PM-5V.EPS K 0,25 mm .010 inch GAGE PLANE Inches Typ. 0.055 0.015 0.354 0.276 0.220 0.031 0.354 0.276 0.220 0.024 0.039 Max. 0.063 0.006 0.057 0.018 0.008 0.030 0o (Min.), 7o (Max.) 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Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://www.st.com 12/12 5V.TBL 16 L D3 D1 D L1 9