FINAL Am79467 Subscriber Line Interface Circuit DISTINCTIVE CHARACTERISTICS Optimized for long-loop operation On-hook transmission Programmable constant-current feed -24 V to -58 V battery operation Programmable loop-current detector On-chip relay driver Programmable ground-key detector Two-wire impedance set by single external impedance Low standby power BLOCK DIAGRAM Ring Relay Driver RINGOUT C1 A(TIP) C2 Input Decoder and Control E0 Ground-Key Detector HPA HPB E1 Two-Wire Interface DET VTX Signal Transmission RSN Off-Hook Detector RD B(RING) DA DB Power-Feed Controller RDC CAS Ring-Trip Detector VBAT BGND VCC VEE AGND/DGND Publication# 18508 Rev: C Amendment: /0 Issue Date: July 1998 F I N A L ORDERING INFORMATION Standard Products AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed by a combination of the elements below. Am79467 -1 J C OPERATING CONDITIONS C = Commercial (0C to 70C)* PACKAGE TYPE J = 28-Pin Plastic Leaded Chip Carrier (PL 028) P = 22-Pin Plastic DIP (PD 022) D = 22-Pin Ceramic DIP (CD 3022) PERFORMANCE GRADE -1 = 52 dB Long. Balance -2 = 63 dB Long. Balance DEVICE NUMBER/DESCRIPTION Am79467 Subscriber Line Interface Circuit Valid Combinations Valid Combinations Am79467 -1 -2 JC PC DC Valid Combinations list configurations planned to be supported in volume for this device. Consult the local AMD sales office to confirm availability of specific valid combinations, to check on newly released combinations, and to obtain additional data on AMD's standard military grade products. Note: * Functionality of the device from 0C to +70C is guaranteed by production testing. Performance from -40C to +85C is guaranteed by characterization and periodic sampling of production units. 2 Am79467 Data Sheet F I N A L CONNECTION DIAGRAMS Top View 22-Pin DIP HPA 1 22 HPB RD 2 21 VTX DA 3 20 VEE DB 4 19 RSN A(TIP) 5 18 AGND/DGND B(RING) 6 17 RDC BGND 7 16 C1 VCC 8 15 C2 RINGOUT 9 14 DET VBAT 10 13 E0 CAS 11 12 E1 VCC NC BGND NC B(RING) A(TIP) NC 28-Pin PLCC 4 3 2 1 28 27 26 24 NC CAS 7 23 DA E1 8 22 RD E0 9 21 HPA NC 10 20 HPB DET 11 19 VTX C2 12 13 14 15 16 17 18 VEE 6 NC VBAT RSN DB AGND 25 RDC 5 C1 RINGOUT Notes: 1. Pin 1 is marked for orientation. 2. NC = No connect SLIC Products 3 F I N A L PIN DESCRIPTIONS 4 Pin Names Type AGND/DGND Gnd A(TIP) Output Description Analog and Digital ground. Output of A(TIP) power amplifier. BGND Gnd B(RING) Output Battery (power) ground. C3-C1 Input CAS Capacitor DA Input Ring-trip negative. Negative input to ring-trip comparator. DB Input Ring-trip positive. Positive input to ring-trip comparator. DET Output E0 Input DET Enable. A logic High disables DET. A logic Low enables DET. E1 Input Ground-Key Enable. A logic High selects the off-hook detector. A logic Low selects the ground-key detector. TTL compatible. HPA Capacitor High-Pass Filter Capacitor. A(TIP) side of high-pass filter capacitor. HPB Capacitor High-Pass Filter Capacitor. B(RING) side of high-pass filter capacitor. NC -- RD Resistor Detector resistor. Detector threshold set and filter pin. RDC Resistor DC feed resistor. Connection point for the DC feed current programming network. The other end of the network connects to the receiver summing node (RSN). Connection point for the DC feed current programming network. The other end of the network connects to the receiver summing node (RSN). VRDC is negative for normal polarity and positive for reverse polarity. RINGOUT Output RSN Input VBAT Battery Battery supply and connection to substrate. VCC Power +5 V power supply. VEE Power -5 V power supply. VTX Output Transmit Audio. This output is a unity gain version of the A(TIP) and B(RING) metallic voltage. VTX also sources the two-wire input impedance programming network. Output of B(RING) power amplifier. Decoder. TTL compatible. C3 is MSB and C1 is LSB. Anti-saturation pin for capacitor to filter reference voltage when operating in antisaturation region. Switchhook detector. When enabled, a logic Low indicates the selected detector is tripped. The detector is selected by the logic inputs (C2-C1, E1-E0). The output is open-collector with a built-in 15 k pull-up resistor. No connect. This pin not internally connected. Ring Relay Driver. Open-collector driver with emitter internally connected to BGND. Receive Summing Node. The metallic current (AC and DC) between A(TIP) and B(RING) is equal to 1000 times the current into this pin. The networks that program receive gain, two-wire impedance, and feed current all connect to this node. Am79467 Data Sheet F I N A L ABSOLUTE MAXIMUM RATINGS Storage temperature . . . . . . . . . . . . -60C to +150C OPERATING RANGES Commercial (C) Devices VCC with respect to AGND/DGND . . . . . 0.5 V to +7 V Ambient temperature . . . . . . . . . . . . . . 0C to +70C* VEE with respect to AGND/DGND . . . . . 0.5 V to -7 V VCC . . . . . . . . . . . . . . . . . . . . . . . . . . 4.75 V to 5.25 V VBAT with respect to AGND/DGND . . . 0.5 V to -70 V VEE . . . . . . . . . . . . . . . . . . . . . . . . -4.75 V to -5.25 V BGND with respect to AGND/DGND . . . +3 V to -3 V VBAT . . . . . . . . . . . . . . . . . . . . . . . . . . -24 V to -58 V A(TIP) or B(RING) to BGND: AGND/DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V Continuous . . . . . . . . . . . . . . . . . . . VBAT to +2 V 10 ms (f = 0.1 Hz) . . . . . . . . . VBAT - 20 V to +5 V 1 s (f = 0.1 Hz). . . . . . . . . . VBAT - 40 V to +10 V 250 ns (f = 0.1 Hz) . . . . . . . .VBAT - 70 V to +15 V Current from A(TIP) or B(RING). . . . . . . . . . . . 70 mA Current through relay driver . . . . . . . . . . . . . . . 50 mA Ring relay supply voltage . . . . . . . . 0 V to VBAT + 75 V DA and DB inputs: BGND with respect to AGND/DGND . . . . . . . . . . . -100 mV to +100 mV Operating Ranges define those limits between which device functionality is guaranteed. * Functionality of the device from 0C to +70C is guaranteed by production testing. Performance from - 40C to +85C is guaranteed by characterization and periodic sampling of production units. Voltage on ring-trip inputs . . . . . . . . . .VBAT to 0 V Current into ring-trip inputs . . . . . . . . . . . . 5 mA C2-C1, E0, E1, DET Input voltage . . . . . . . . . . . . . . . . . . . . 0 V to VCC Output voltage (DET not active) . . . . . 0 V to VCC Output current (DET) . . . . . . . . . . . . . . . . . . 5 mA Power Dissipation (TA 70C): Continuous . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 W Peak (t < 100 ms, tREP > 1 s). . . . . . . . . . . . . 4 W Note: Thermal limiting circuitry on chip will shut down the circuit at a junction temperature of about 165C. The device should never be exposed to this temperature. Operation above 145 C junction temperature may degrade device reliability. See the SLIC Packaging Considerations for more information. Stresses above those listed under Absolute Maximum Ratings may cause permanent device failure. Functionality at or above these limits is not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device reliability. SLIC Products 5 F I N A L ELECTRICAL CHARACTERISTICS Description Test Conditions (See Note 1) Min Typ Max Unit Note dB 1, 4 20 4 +35 +40 mV -- 4 Transmission Performance 2-wire return loss 200 Hz to 500 Hz 500 Hz to 1 kHz 1.0 kHz to 3.4 kHz 25 27 23 ZVTX, Analog output impedance 3 VVTX, Analog output offset voltage 0C to +70C -40C to +85C -35 -40 Overload level, 2-wire and 4-wire RL = 600 3.1 Overload level Load impedance > 20 k 3.1 THD, Total harmonic distortion 1.0 kHz, 0 dBm THD, on-hook 0 dBm, RL = 900 , Battery = -51 V 2 Vpk -65 -54 dB 5 dB -- 4 -35.5 Longitudinal Performance Longitudinal to metallic L-T, L-4 balance 200 Hz to 3.4 kHz -1 parts* Longitudinal to metallic L-T, L-4 balance 200 Hz to 1 kHz: 0C to +70C -40C to +85C -2 parts* 1 kHz to 3.4 kHz: 0C to +70C -40C to +85C -2 parts* Longitudinal signal generation 4-L 63 55 58 55 200 Hz to 4 kHz, normal polarity Longitudinal current per pin (A or B) Active state Longitudinal impedance (A or B) 52 -- 4 45 55 25 35 0 Hz to 100 Hz mArms 20 35 /pin Idle Channel Noise C-message weighted noise 2-wire: 0C to +70C -40C to +85C +7 +10 +12 4-wire: 0C to +70C -40C to +85C +7 +10 +12 2-wire: 0C to +70C -40C to +85C -83 -80 -78 4-wire: 0C to +70C -40C to +85C -83 -80 -78 -- 4 dBrnC Psophometric weighted noise -- 4 dBmp 4 Receive Summing Node (RSN) RSN DC voltage IRSN = 0 mA 0 RSN impedance 200 Hz to 3.4 kHz 10 20 RSN current to metallic loop-current gain 300 Hz to 3.4 kHz 1000 1000 1012 1020 0C to +70C -40C to +85C Note: * Performance Grade 6 Am79467 Data Sheet 988 980 V 4 F I N A L ELECTRICAL CHARACTERISTICS (continued) Description Test Conditions (See Note 1) Min Typ Max 0 0 +0.15 +0.20 Unit Note Insertion Loss and Balance Return Signal (2-Wire to 4-Wire, 4-Wire to 2-Wire, and 4-Wire to 4-Wire, See Test Circuits A and B) Gain accuracy over temperature 0 dBm, 1 kHz 0C to +70C -40C to +85C -0.15 -0.20 Gain accuracy over frequency 300 Hz to 3.4 kHz (relative to 1 kHz): 0C to +70C -40C to +85C -0.10 -0.15 +0.10 +0.15 Gain tracking +3 dBm to -55 dBm (relative to 0 dBm): 0C to +70C -40C to +85C -0.10 -0.15 +0.10 +0.15 Group delay 0 dBm, 1 kHz 3 4 dB 3, 4 4 s 5.3 3 4 5 Line Characteristics Long loops, Active state BAT = -50 V, RLDC = 2000 21 IL, Loop current accuracy IL in constant-current region 0.915IL IL 1.085IL 0.8IL IL 1.2IL IL, Accuracy, Standby state IL V BAT - 3 V = ------------------------------R L + 1800 IL, Loop current Disconnect, RL = 0 VAB, Open Circuit voltage VBAT = -50 V TA = 25C 4 100 42.8 mA A V Power Supply Rejection Ratio (VRIPPLE = 100 mVrms), Active Normal State VCC VEE VBAT 50 Hz to 3.4 kHz 50 Hz to 3.4 kHz 50 Hz to 3.4 kHz Effective internal resistance CAS pin to GND 30 30 35 40 36 41 dB 5 60 k 4 Off-Hook Detector On-threshold RD = 33 k 11.3 17.3 Off-threshold RD = 33 k 9.85 14.7 Hysteresis RD = 33 k 0 3.2 mA Power Dissipation, Battery = -58 V On-hook Open Circuit state 25 On-hook Standby state 50 mW On-hook Active state RL = , VBAT = -50 V 145 300 Off-hook Active state RL = 0 RL = 300 RL = 600 1.5 1.4 1.2 1.8 1.6 1.4 SLIC Products W 7 F I N A L ELECTRICAL CHARACTERISTICS (continued) Description Test Conditions (See Note 1) Min Typ Max Unit Note Supply Currents, Battery = -58 V ICC, on-hook VCC supply current Open Circuit state Standby state Active state, VBAT = -50 V 1.2 1.7 4.8 2.0 2.5 6.5 IEE, on-hook VEE supply current Open Circuit state Standby state Active state, VBAT = -50 V 0.5 0.9 1.9 1.3 1.6 3.0 Open Circuit state Standby state Active state, VBAT = -50 V 0.3 0.7 2.6 1.2 1.6 4.5 IBAT, on-hook VBAT supply current mA Ground-Key Detector Thresholds IA and IB delta to trigger the ground-key detector 8 12 17 IA and IB delta to clear the triggered ground-key detector 3 7 12 Hysteresis 3 5 8 -500 -100 -50 0 mA Ring-Trip Detector Input Bias current Offset voltage Source resistance = 0 to 2 M Input resistance Unbalanced Balanced nA +50 1 3 Input common mode range mV M VBAT -2 V Logic Inputs (C2-C1, E0, E1) VIH, Input High voltage 2.0 V VIL, Input Low voltage 0.8 IIH, Input High current All inputs except E1 -75 40 Input High current Input E1 -75 45 IIL, Input Low current A -500 Logic Output (DET) VOH, Output Low voltage IOUT = 0.8 mA, 15 k to VCC VOL, Output High voltage IOUT = -0.1 mA, 15 k to VCC Internal pull-up resistor 0.40 V 2.4 8 25 k +0.75 V 10 A Relay Driver Output (RINGOUT) On voltage IOL = 25 mA Off leakage VOH = +12 V 8 +0.2 Am79467 Data Sheet 4 F I N A L RELAY DRIVER SCHEMATIC RINGOUT BGND SWITCHING CHARACTERISTICS Symbol tgkde Parameter Test Conditions E1 Low to DET High (E0 = 1) E1 Low to DET Low (E0 = 1) Ground-Key Detect state RL open, RG connected (See Figures E and F) Temperature Ranges Min Typ Max 0C to +70C -40C to +85C 3.8 4.0 0C to +70C -40C to +85C 1.1 1.6 0C to +70C -40C to +85C 1.1 1.6 tgkdd E0 High to DET Low (E1 = 0) tgkd0 E0 Low to DET High (E1 = 0) 0C to +70C -40C to +85C 3.8 4.0 tshde E1 High to DET Low (E0 = 1) 0C to +70C -40C to +85C 1.2 1.7 0C to +70C -40C to +85C 3.8 4.0 0C to +70C -40C to +85C 1.1 1.6 0C to +70C -40C to +85C 3.8 4.0 E1 High to DET High (E0 = 1) tshdd E0 High to DET Low (E1 = 1) tshd0 E0 Low to DET High (E1 = 1) Switchhook Detect state RL = 600 , RG open (See Figures E and F) SLIC Products Unit Note s 4 9 F I N A L SWITCHING WAVEFORMS E1 to DET E1 DET tgkde tshde tgkde tshde E0 to DET E1 E0 DET tshdd tshd0 tgkdd Note: All delays measured at 1.4 V level. 10 Am79467 Data Sheet tgkd0 F I N A L Notes: 1. Unless otherwise noted, test conditions are BAT = -52 V, VCC = +5 V, VEE = -5 V, RL = 600 , CHP = 18 nF, RDC1 = RDC2 = 52.3 k, CDC = 0.68 F, RD = 33 k, no fuse resistors, D1 = 1N400x, two-wire AC input impedance is a 600 resistance synthesized by the programming network shown below. VTX RT1 CT1 RT2 RSN RRX VRX Where: RT1 = RT2 = RRX = 300 k, CT1 = 150 pF* * CT1 is not required when 23 dB two-wire return loss at higher voice frequencies is acceptable. If CT1 is not used, RT1 and RT2 can be combined into one resistor. If this SLIC is used with a DSLACTM device, CT1 is not required. 2. Overload level is defined when THD = 1%. 3. Balance return signal is the signal generated at VTX by VRX. This specification assumes the two-wire AC load impedance matches the programmed impedance. 4. Not tested in production. This parameter is guaranteed by characterization or correlation to other tests. 5. This parameter is tested at 1 kHz in production. Performance at other frequencies is guaranteed by characterization. Table 1. State E1 C1 C2 SLIC Decoding Two-Wire Status Detector Mode DET Output 0 0 0 0 Open Circuit No active detector Logic level High 1 0 0 1 Active Ground-key detector Ground key 2 0 1 0 Ringing No active detector Logic level High 3 0 1 1 Standby Ground-key detector Ground key 4 1 0 0 Open Circuit No active detector Logic level High 5 1 0 1 Active Loop-current detector Loop-current status 6 1 1 0 Ringing Ring-trip detector Ring-trip status 7 1 1 1 Standby Loop-current detector Loop-current status Note: E0 = 1. For E0 = 0, DET = logic level High. SLIC Products 11 F I N A L Table 2. Z T = 1000 ( Z 2WIN - 2RF ) User-Programmable Components Where ZT is connected between the VTX and RSN pins. The fuse resistors are RF, and Z2WIN is the desired 2-wire AC input impedance. When computing ZT, the internal current amplifier pole and any external stray capacitance between VTX and RSN must be taken into account. Z ZRX = -----T2 Where ZRX is connected from VRX to the RSN pin and ZT is defined above. This equation sets the receive gain to 0 dB when the SLIC is terminated with an impedance equal to Z2WIN. 2500 V RDC1 + R DC2 = -----------------I LOOP Where RDC1, RDC2, and CDC form the network connected to the RDC pin. RDC1 and RDC2 are approximately equal. ILOOP is the desired loop current in the constant-current region. 1 + -----------1 - CDC = 30 ms ------------R DC1 R DC2 365 RD = --------- , IT msC D = 0.5 --------------RD 1 CCAS = -----------------------------( 1.2 * 10 5 )fc 12 Where RD and CD form the network connected from RD to -5 V and IT is the threshold current between on hook and off hook. Where CCAS is the regulator filter capacitor and fc is the desired filter cut-off frequency. Am79467 Data Sheet F I N A L DC FEED CHARACTERISTICS 3 50 5 4 7 2 45 8 40 VAB (V) 35 30 6 1 25 20 15 10 5 0 0 5 10 15 20 25 30 Loop Current (mA) RDC = 104.6 k VBAT = 51.3 V RD = 33 k Notes: 1. Constant-current region: I L = 2500 -----------R DC 2. Anti-sat (battery tracking) turn-on: V AB = 0.96 V BAT - 3.65 3. Open Circuit voltage: VAB = 1.025 V BAT - 6.23 4. Anti-sat region (IL > IDET): R DC 2500 V AB = 0.96 V BAT - 3.65 + ------------ - IL ----------- 600 600 5. Anti-sat region (IL < IDET): R DC V AB = 1.025 V BAT - 6.23 - I L ----------- 600 6. Loop-detect (IDET) threshold: 365 I DET = --------RD 7. Anti-sat transition region, off-hook to on-hook 8. Anti-sat transition region, on-hook to off-hook a. VA-VB (VAB) Voltage vs. Loop Current (Typical) SLIC Products 13 F I N A L DC FEED CHARACTERISTICS (continued) 30 Loop Current (mA) 25 20 15 10 5 0 0 1000 2000 3000 4000 5000 Load Resistance () RDC = 104.6 k VBAT = 51.3 V RD = 33 k b. Loop Current vs. Load Resistance (Typical) A RSN a RL IL RDC1 SLIC b RDC2 RDC B Feed current programmed by RDC1 and RDC2 c. Feed Programming Figure 1. 14 DC Feed Characteristics Am79467 Data Sheet CDC 6000 F I N A L TEST CIRCUITS A(TIP) A(TIP) VTX RL VTX SLIC 2 SLIC AGND VL AGND RT VAB RL RL VAB RT RRX RRX 2 RSN RSN B(RING) B(RING) IL2-4 = 20 log (VTX / VAB) VRX IL4-2 = 20 log (VAB / VRX) BRS = 20 log (VTX / VRX) A. Two- to Four-Wire Insertion Loss 1 C B. Four- to Two-Wire Insertion Loss and Balance Return Signal ZD << RL A(TIP) A(TIP) 2 S1 VTX VTX RL R SLIC C SLIC AGND AGND VL RT VAB VL S2 RL 2 RT1 VS VM RRX R RSN B(RING) VRX RT2 ZIN CT1 RSN B(RING) RRX S2 Open, S1 Closed: L-T Long. Bal. = 20 log (VAB / VL) L-4 Long. Bal. = 20 log (VTX / VL) S2 Closed, S1 Open: Note: ZD is the desired impedance (e.g., the characteristic impedance of the line). RL = 20 log (2 VM / VS) 4-L Long. Sig. Gen. = 20 log (VL / VRX) D. Two-Wire Return Loss Test Circuit C. Longitudinal Balance SLIC Products 15 F I N A L TEST CIRCUITS (continued) VCC 6.2 k A(TIP) DET 15 pF RL = 600 B(RING) E1 E. Loop-Detector Switching A(TIP) B(RING) RG RG: 2 k at VBAT = -48 V F. Ground-Key Switching 16 Am79467 Data Sheet F I N A L TEST CIRCUITS (continued) -5 V +5 V VCC VEE DA RD DB RD VTX 2.2 nF VTX A(TIP) A(TIP) RT HPA CHP HPB B(RING) B(RING) VRX RSN RDC1 2.2 nF RRX RDC2 RDC CDC RINGOUT AGND/ DGND BATTERY GROUND BGND CBAT BAT VBAT D1 E1 E0 C2 C1 ANALOG GROUND DET CAS DIGITAL GROUND CCAS G. Am79467 Test Circuit SLIC Products 17 F I N A L REVISION SUMMARY Revision A to Revision B * Minor changes to the data sheet style and format were made to conform to AMD standards. * Electrical Characteristics--Under Longitudinal Performance, the specifications for Longitudinal to Metallic moved from the Typ column to the Min column. * Table 2--The equation on the second row was revised. Revision B to Revision C * Minor changes to the data sheet style and format were made to conform to AMD standards. Trademarks Copyright 1998 Advanced Micro Devices, All rights reserved. AMD, the AMD logo and combinations thereof are trademarks of Advanced Micro Devices, Inc. DSLAC and QSLAC are trademarks of Advanced Micro Devices, Inc. Product names used in this publication are for identification purposes only and may be trademarks of their respective companies. 18 Am79467 Data Sheet