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| ST952 D.A.A. LINE INTERFACE . . . . . . . . . . . . . . PRELIMINARY DATA 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 TQFP32 (7 x 7 x 1.4mm) (Thin Plastic Quad Flat Pack) ORDER CODE : ST952TQF7 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. Tip Digital ST75951 Signals ST952 952-02.EPS 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. PIN CONNECTIONS VDREF TER2 COM IREF OHC IDC NC NC 16 15 14 13 12 11 10 9 TER1 SET VDR LINE IDG IDI LINI GAIN 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 8 7 6 5 4 3 2 1 LIM1 LIM2 TOFF D6 D5 RIN D4 D3 Ring 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. December 1998 1/12 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 LCOM AOUT AIN NC NC D1 D2 ST952 PIN LIST Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Name D3 D4 RIN D5 D6 TOFF LIM2 LIM1 IDC COM OHC N.C. N.C. IREF VDREF TER2 TER1 SET VDR LINE IDG IDI LINI GAIN LCOM AIN AOUT N.C. N.C. D1 D2 LCOM Type Output Output Input Input Input Supply Input Output Output Output Output Input Supply Output Output Input Supply Output Input Input Input Input Ground Input Output Input Input Ground Isolation Signal Output Isolation Signal Output Ring Signal Input Isolation Control Signal Input Isolation Control Signal Input Internal Reference Supply Loop Current Limiter Control Loop Current Limiter Control Caller ID Control Output Off-hook & ID Commun Output Off-hook Control Output Not Connected Not Connected Current Reference Setting Internal Reference Pin Current Regulator Control Feedback Current Regulator Control Output Current Regulator Filter Line DC Voltage Regulator Line AC Signal Output Caller ID Voltage Reference Input Caller ID Signal Input Line AC Signal Input Transmit Gain / Trans-Hybrid Loss Set Line Side Common Ground Analog Transmit Signal Input Analog Transmit Signal Output Not Connected Not Connected Isolation Signal Input Isolation Signal Input Line Side Common Ground 952-01.TBL Description Note : Pins 12, 13, 28 and 29 must be left opened. 2/12 ST952 PIN DESCRIPTION D1 - D2 These pins input the AC signal modulated at Fmod coming from ST75951 through the capacitive isolation barrier. 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. 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. Figure 1 D5 5V Fmod 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. IREF Internal reference current source setting, R4 must be equal to 82k. VDR Power supply for the transmit and receive paths in Off-Hook mode. 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. COM Commun output for off-hook and CLID external transistor stages 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 5V Fmod D6 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 620. GAIN R1 connected on this pin fixes the transmit gain. The R1 recommanded value, on a 600 AC line termination, is 82. 952-03.EPS D6 3/12 952-04.EPS D5 4/12 C8 Tip AOUT AIN R8 Output Amplifier C6 ST952 BLOCK DIAGRAM 27 26 ST952 LINE Q1 R5 GAIN R1 C1 D1 HIGH PASS FILTER LOW PASS FILTER 30 24 20 D2 Fmod 31 Ring D3 1 LINI IDI C2 R2 R3 23 22 Q3 R6 ST75951 IDG D4 2 2W/4W CONVERTER & HYBRID RIN 3 Fmod RING DETECT CLID REFERENCE VOLTAGE 21 Q2 Q4 Q5 19 15 14 VDR VDREF IREF C3 R7 C4 D5 CLID & OFF-HOOK SWITCH CONTROL CURRENT LIMITER OFF-HOOK REFERENCE VOLTAGE 4 D6 5 6 LIM2 IDC OHC LIM1 TER2 COM TOFF 32 25 LCOM C9 10 11 9 7 8 16 17 18 TER1 SET R4 C5 C7 R9 LCOM 952-05.EPS ST952 ABSOLUTE MAXIMUM RATING (AGND = DGND = 0V, all voltages with respect to 0V) Symbol VMLINE Toper Tstg Operating Temperature Storage Temperature Parameter Positive Line Voltage Continuous Value 14 0, +70 -55, +150 Unit V C C 952-02.TBL THERMAL DATA Symbol Rth (j-a) Parameter Junction-ambient Thermal Resistance Max. Value 80 Unit o C/W ELECTRICAL CHARACTERISTICS (Tamb = 25oC, unless otherwise specified) Symbol Parameter Test Conditions Min. Typ. Max. Unit DC AND AC TERMINATION (see Figure 3) VLINE ZLOSS Line Voltage Return Loss IL = 20mA IL = 120mA IL = 20mA, VLAC = -6dBV f = 200 to 4000Hz 24 4.1 10.5 V V dB dB RECEIVE PATH (IL = 20mA, f = 1kHz, see Figure 4) Grx Grf Receive Gain Receive Frequency Response VLAC = 0dBV, VTAC = 0 VLAC = 0dBV, VTAC = 0 f = 200 to 3400Hz f = 50 to 200Hz VLAC = 0dBV, VTAC = 0 f = 150Hz f = 1000Hz VLAC = 0, VTAC = -6dBV, Fmod = 1.5MHz VLAC = VTAC = 0, f = 200-3400Hz, 100Hz BW VTAC = -6dBV VTAC = -6dBV, f = 200 to 4000Hz VTAC = -6dBV, Fmod = 1.5MHz VTAC = 0, f = 200-3400Hz, 100Hz BW ST952 Line Pin + Ic(Q5) D5 and D6 Input Active (Off-hook) Inactive (On-hook) D5 Input Active (CLID On) Inactive (On-hook) VTAC = -15dBV 10 2.7 -0.5 -0.2 -82 3 -93 -0.5 -0.1 -0.5 -79 -82 30 35 -93 0 0.5 +0.1 +0.5 dB dB dB dBV dBV dB dBV Rxhd Receive 2nd/3th/4th Harmonic Distortion Thl Rn Trans-Hybrid Loss Receive Noise Floor TRANSMIT PATH (IL = 20mA, f = 1kHz, VLAC = 0, see Figure 4) Gtx Gtf Txhd Txmax Tn Transmit Gain Transmit Frequency Response Transmit 2nd/3th/4th Harmonic Distortion Max Line Drive Voltage Transmit Noise Floor 0 0.5 +0.2 dB dB dBV VPP dBv POWER AND DC LOGIC INPUT (see Figure 5) ILINE VOFH Line Current Hook Switch Input 120 5.25 0.8 5.25 0.8 0 +1 1 mA V V V V dB mA 952-04.TBL VCLID CLID Input 2.7 CALLER ID RECEIVE PATH (see Figure 6) GRID ILID VRIOF VRION CLID Receive Gain CLID Line Current -1 RING INDICATOR (see Figure 7) D3 & D4 Ring indicator D3 = D4 = 0 D3 = D4 = 3VPP 8 18 V V Note : D3 and D4 are complementary outputs. 5/12 952-03T.BL 6/12 1m F AOUT AIN S1 IL + IAC 600W 100m F IL VLAC IAC ST952 Figure 3 : Test 1 27 VACLINE 26 ST952 Output Amplifier LINE GAIN 47kW BC 557 D1 30 HIGH PASS FILTER LOW PASS FILTER 20 24 82W D2 31 Fmod 1m F D3 1 LINI IDI 1nF 47kW 620W BC 547 23 22 BC 557 S1 opened : - VLINE at IL = 20 & 120mA D4 2 2W/4W CONVERTER & HYBRID 47kW RIN 3 Fmod RING DETECT CLID REFERENCE VOLTAGE 21 IDG S1 closed : - ZLOSS measured VACLINE ZTER = IAC BC 547 BC 547 ZLOSS = 20.log ZTER + 600 ZTER - 600 19 15 14 VDR 47m F VDREF 100nF IREF 39W VD5/1.5MHz CLID & OFF-HOOK SWITCH CONTROL CURRENT LIMITER D5 OFF-HOOK REFERENCE VOLTAGE 4 VD6/1.5MHz D6 5 6 LIM2 IDC OHC LIM1 TER1 COM TER2 TOFF SET 32 25 10 11 9 7 8 16 17 18 82kW 4.7m F LCOM 100nF LCOM 952-06.EPS Figure 4 : Test 2 1m F AOUT AIN 27 VACLINE 26 ST952 Output Amplifier LINE GAIN 47kW BC 557 100m F D1 30 HIGH PASS FILTER LOW PASS FILTER 20 24 20mA 82W VTAC 1.5MHz DEMODULATOR Fmod 1m F 600W D2 31 VLAC BC 557 D3 1 LINI IDI 1nF 47kW 620W BC 547 23 22 VRAC 1.5MHz DEMODULATOR D4 2 2W/4W CONVERTER & HYBRID 47kW Gr = 20.log Gt = 20.log BC 547 VRAC and VTAC = 0 VACLINE VACLINE and VLAC = 0 VTAC BC thl = 20.log VACLINE @ V = 0 LAC VRAC 547 RIN 3 Fmod RING DETECT CLID REFERENCE VOLTAGE 21 IDG 19 15 14 VDR 47m F VDREF 100nF IREF 39W 5V/1.5MHz CLID & OFF-HOOK SWITCH CONTROL CURRENT LIMITER D5 OFF-HOOK REFERENCE VOLTAGE 4 5V/1.5MHz D6 5 6 LIM2 IDC OHC LIM1 COM TER2 TER1 TOFF 32 25 LCOM 100nF 10 11 9 7 8 16 17 18 SET 82kW 4.7m F LCOM ST952 7/12 952-07.EPS 8/12 1m F AOUT AIN ST952 Figure 5 : Test 3 27 26 ST952 Output Amplifier LINE GAIN 47kW BC 557 100m F D1 30 HIGH PASS FILTER LOW PASS FILTER 20 24 82W 600W D2 31 Fmod 1m F ILINE D3 1 LINI IDI 1nF 47kW 620W 23 22 BC 557 D4 2 2W/4W CONVERTER & HYBRID 47kW RIN 3 Fmod RING DETECT CLID REFERENCE VOLTAGE 21 IDG BC 547 BC 547 BC 547 19 15 14 17 18 TER2 TER1 SET VDR 47m F VDREF 100nF IREF 39W VD5/1.5MHz CLID & OFF-HOOK SWITCH CONTROL CURRENT LIMITER D5 4 VD6/1.5MHz D6 5 6 LIM2 IDC OHC LIM1 COM TOFF OFF-HOOK REFERENCE VOLTAGE 32 25 LCOM 100nF 10 11 9 7 8 16 82kW 4.7m F LCOM 952-08.EPS Figure 6 : Test 4 1m F AOUT AIN 27 VACLINE 26 ST952 Output Amplifier LINE GAIN 47kW BC 557 100m F D1 30 HIGH PASS FILTER LOW PASS FILTER 20 24 82W 1mA 600W D2 31 Fmod 1m F VLAC BC 557 D3 1 LINI IDI 1nF 47kW 620W 23 22 VRAC 0.75MHz DEMODULATOR D4 2 2W/4W CONVERTER & HYBRID 47kW Grid = 20.log VRAC VACLINE RIN 3 Fmod RING DETECT CLID REFERENCE VOLTAGE 21 IDG BC 547 BC 547 BC 547 19 15 14 VDR 47m F VDREF 100nF IREF 39W D5 CLID & OFF-HOOK SWITCH CONTROL CURRENT LIMITER OFF-HOOK REFERENCE VOLTAGE VD5/1.5MHz 4 D6 5 32 25 LIM2 IDC OHC LIM1 TER2 COM TOFF LCOM 100nF 6 10 11 9 7 8 16 17 18 TER1 SET 82kW 4.7m F LCOM ST952 9/12 952-09.EPS ST952 Figure 7 : Test 5 1m F AOUT AIN 27 26 ST952 Output Amplifier D1 30 D2 31 HIGH PASS FILTER Fmod LOW PASS FILTER LINE GAIN 82W 20 24 BC 557 47kW 1m F D3 1 D4 2 2W/4W CONVERTER & HYBRID 23 22 LINI IDI 1nF 47kW 620W BC 557 47kW RIN 10kW 3 RING DETECT Fmod CLID REFERENCE VOLTAGE 21 IDG BC 547 BC 547 BC 547 19 Ur D5 4 D6 5 CLID & OFF-HOOK SWITCH CONTROL CURRENT LIMITER OFF-HOOK REFERENCE VOLTAGE VDR 47m F VDREF 100nF IREF 82kW 4.7m F 39W 15 14 32 25 LCOM LCOM 6 TOFF 10 11 OHC COM 9 IDC 7 LIM2 8 LIM1 16 TER2 17 18 TER1 SET 100nF 952-10.EPS For Ur = V1, no signal on D3/D4 For Ur = V2, 6VPP/1MHz on D3/D4 10/12 ST952 TYPICAL APPLICATION (5V Supply on ST75951) Tip SMTPA 270 10W 47nF 22kW D4 D5 Q1 ST952 1m F 23 LINI 13V 82W D6 Ring D7 47kW ST75951 24 GAIN D1 30 35 D1 34 D2 MCLK SCLK FS Q2 22kW 47nF Q4 47kW 11 OHC D2 31 8 2 3 P R O C E S S O R 10 COM Q5 Q3 17 TER1 16 TER2 3 1nF 47kW RIN D3 D4 1 2 31 D3 30 D4 DIN 46 DOUT 47 RESET 43 PWRDWN 11 HC1 20 LINE 22 IDI 9 620W D5 4 5 7 8 27 D5 26 D6 21 IDG D6 9 47m F IDC LIM2 LIM1 19 VDR 15 VDREF 14 IREF 18 SET 4.7m F AOUT 27 1m F AIN 26 100nF 25 LCOM 32 LCOM 6 TOFF 952-11.EPS 82kW 39W 100nF 11/12 ST952 PACKAGE MECHANICAL DATA 32 PINS - PLASTIC THIN QUAD FLAT PACK (TQFP) A A2 32 1 e A1 25 24 0,10 mm .004 inch SEATING PLANE B 8 9 16 17 c D3 D1 D L1 L E3 E1 E K 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 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 Min. 0.002 0.053 0.012 0.004 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 0.45 0.75 0.018 0.030 5V.TBL 0o (Min.), 7o (Max.) Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 1998 STMicroelectronics - All Rights Reserved Purchase of I2C Components of STMicroelectronics, conveys a license under the Philips I2C Patent. 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 PM-5V.EPS 0,25 mm .010 inch GAGE PLANE |
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