Low Cost 24V SLIC For PABX/Key Systems

HC5503 March 1999 File Number 4344.3 Low Cost 24V SLIC For PABX/Key Systems The Intersil HC5503 low cost SLIC is optimized for use in small Analog or mixed Analog and Digital Key Telephone Systems (KTS) or PBX products. The low component count solution and surface mount package options, enable a small desktop Key System/PBX product to be achieved. The internal power dissipation of the end product is minimized by the low power consumption and minimal power supply voltage requirements of the HC5503. The HC5503 integrated solution provides higher quality, higher reliability and better performance solution than a transformer, thick film hybrid or discrete analog subscriber interface design. The HC5503 is designed in a Dielectrically isolated bipolar technology and is inherently latch proof and does not require hot plug or power supply sequencing precautions. Description • Wide Operating Battery Range (-21V to -44V) • Single Additional +5V Supply • 25mA Short Loop Current Limit • Ring Relay Driver • Switch Hook and Ring Trip Detect • Low On-Hook Power Consumption • On-Hook Transmission • ITU-T Longitudinal Balance Performance • Loop Power Denial Function • Thermal Protection • Supports Tip, Ring or Balanced Ringing Schemes • Low Profile SO and PLCC Surface Mount Packaging • Pin Compatible with Industry Standard HC5504B SLIC Ordering Information PART NUMBER HC5503CM HC5503CB TEMP. RANGE (oC) 0 to 75 0 to 75 PACKAGE 28 Ld PLCC 24 Ld SOIC PKG. NO. N28.45 M24.3 Applications • Analog Subscriber Line Interfaces in Analog Key Systems and Digital ISDN PABX Systems • Related Literature - AN571, Using Ring Sync with HC-5502A and HC-5504 SLICs Block Diagram RD RING RELAY DRIVER 4-WIRE INTERFACE VF SIGNAL PATH TX RX RFS C2 RING TRIP DETECTOR TIP TF RING RF THERMAL LIMIT VBAT VCC AGND BGND DGND BIAS 2-WIRE INTERFACE LOOP CURRENT DETECTOR LOGIC INTERFACE SHD RS RC PD C1 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999 HC5503 Absolute Maximum Ratings (Note 1) Maximum Continuous Supply Voltages (VBAT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -60 to 0.5V (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 15V (VCC - VBAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75V Relay Drive Voltage (VRD) . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 15V Thermal Information Thermal Resistance (Typical, Note 2) θJA (oC/W) 24 Lead SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 28 Lead PLCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 Maximum Junction Temperature . . . . . . . . . . . . . . . . . . . . . . .150oC Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300oC (PLCC and SOIC - Lead Tips Only) Operating Conditions Operating Temperature Range HC5503 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 75oC Relay Driver Voltage (VRD) . . . . . . . . . . . . . . . . . . . . . . . . 5V to 12V Positive Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . 4.75V to 5.25V Negative Supply Voltage (VBAT) . . . . . . . . . . . . . . . . . .-22V to -26V High Level Logic Input Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . 2.4V Low Level Logic Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 0.6V Die Characteristics Transistor Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185 Diode Count. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Die Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137 x 102 Substrate Potential. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Connected Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bipolar-DI CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. NOTES: 1. Absolute maximum ratings are limiting values, applied individually, beyond which the serviceability of the circuit may be impaired. Functional operability under any of these conditions is not necessarily implied. 2. θJA is measured with the component mounted on an evaluation PC board in free air. Electrical Specifications Unless Otherwise Specified, VBAT = -24V, VCC = 5V, AG = BG = DG = 0V, Typical Parameters TA = 25oC. Min-Max Parameters are Over Operating Temperature Range PARAMETER On Hook Power Dissipation Off Hook Power Dissipation Off Hook IVCC Off Hook IVCC Off Hook IBAT Off Hook Loop Current Off Hook Loop Current Off Hook Loop Current Fault Currents TIP to Ground RING to Ground TIP to RING TIP and RING to Ground Ring Relay Drive VOL Ring Relay Driver Off Leakage Ring Trip Detection Period Switch Hook Detection Threshold Loop Current During Power Denial Dial Pulse Distortion Receive Input Impedance Transmit Output Impedance RL = 200Ω (Note 4) (Note 5) (Note 5) IOL = 62mA VRD = 12V, RC = 1 = HIGH, TA = 25oC RL = 600Ω, (Note 5) (Note 4) (Note 4) 5 0 27.5 70 30 140 0.2 2 ±2 90 10 0.5 25 3 10.5 0.5 20 mA mA mA mA V µA Ring Cycles mA mA ms kΩ Ω CONDITIONS ILONG = 0 (Note 3), VCC = 5V RL = 600Ω, ILONG = 0 (Note 4), VCC = 5V RL = 600Ω, ILONG = 0 (Note 3), TA = 0oC RL = 600Ω, ILONG = 0 (Note 3), TA = 25oC RL = 600Ω, ILONG = 0 (Notes 3, 4) RL = 400Ω, ILONG = 0 (Note 3) RL = 400Ω, VBAT = -21.6V, ILONG = 0 (Note 3) TA = 25oC RL = 200Ω, ILONG = 0 (Note 3) MIN 17.5 TYP 80 180 19 22.9 25 MAX 100 200 6.0 4.0 23 30 UNITS mW mW mA mA mA mA mA mA 2 HC5503 Electrical Specifications Unless Otherwise Specified, VBAT = -24V, VCC = 5V, AG = BG = DG = 0V, Typical Parameters TA = 25oC. Min-Max Parameters are Over Operating Temperature Range (Continued) PARAMETER 2-Wire Return Loss SRL LO ERL SRL HI Longitudinal Balance 2-Wire Off Hook 2-Wire On Hook 4-Wire Off Hook at 1kHz Insertion Loss 2-Wire to 4-Wire at 3.4kHz VTR to VO VO is the Output of the Transhybrid Amplifier 4-Wire to 2-Wire at 300Hz Frequency Response Idle Channel Noise 2-Wire to 4-Wire Idle Channel Noise 4-Wire to 2-Wire Absolute Delay 2-Wire to 4-Wire, 4-Wire to 2-Wire Trans Hybrid Loss Overload Level 2-Wire to 4-Wire (On-hook) 4-Wire to 2-Wire (Off-hook, RL = 600Ω) Level Linearity 2-Wire to 4-Wire, 4-Wire to 2-Wire At 1kHz, (Note 4) Referenced to 0dBm Level +3 to -40dBm -40 to -50dBm -50 to -55dBm Power Supply Rejection Ratio VCC to 2-Wire VCC to Transmit VBAT to 2-Wire VBAT to Transmit VCC to 2-Wire VCC to Transmit VBAT to 2-Wire VBAT to Transmit Logic Input Current (RS, RC, PD) 0V ≤ VIN ≤ 2.4V 200 - 16kHz, RL = 200Ω (Note 4) 30 - 60Hz, RL = 200Ω ±0.05 ±0.1 ±0.3 dB dB dB Balance Network Set Up for 600Ω Termination at 1kHz VCC = +5V 2.5 3.1 VPEAK VPEAK (Note 4) 200 - 3400Hz Referenced to Absolute Loss at 1kHz and 0dBm Signal Level (Note 4) 0dBm Input Level, Referenced 600Ω 1VRMS 200Hz - 3400Hz, (Note 4) IEEE Method 0oC ≤ TA ≤ 75oC CONDITIONS Referenced to 600Ω +2.16µF (Note 4) 15.5 24 31 dB dB dB MIN TYP MAX UNITS 53 53 50 58 58 58 - dB dB dB -3.8 (Note 5) 30 ±0.05 -4.0 ±0.02 1 -89 1 -89 ±0.2 -4.2 ±0.05 5 -85 5 -85 dB dB dB dBrnC dBm0p dBrnC dBm0p µs dB 40 2 - 35 35 20 20 35 35 35 35 - - ±20 dB dB dB dB dB dB dB dB µA 3 HC5503 Electrical Specifications Unless Otherwise Specified, VBAT = -24V, VCC = 5V, AG = BG = DG = 0V, Typical Parameters TA = 25oC. Min-Max Parameters are Over Operating Temperature Range (Continued) PARAMETER Logic Inputs Logic ‘0’ VIL Logic ‘1’ VIH SHD Output Logic ‘0’ VOL Logic ‘1’ VOH ILOAD 800µA, VCC = 5V ILOAD 40µA, VCC = 5V 2.7 0.1 0.4 5.0 V V 2.0 0.8 5.5 V V CONDITIONS MIN TYP MAX UNITS NOTES: 3. ILONG = Longitudinal Current. 4. These parameters are controlled by design or process parameters and are not directly tested. These parameters are characterized upon initial design release, upon design changes which would affect these characteristics, and at intervals to assure product quality and specification compliance. 5. Guaranteed by design, not tested. 4 HC5503 Design Information Line Feed Amplifiers The line feed amplifiers are high power operational amplifiers and are connected to the subscriber loop through 150Ω of feed resistance as shown in Figure 1. The feed resistors and synthesized impedance via feedback provide a 600Ω balanced load for the 2-wire to 4-wire transmission. The tip feed amplifier is configured as a unity gain noninverting buffer. A -4V bias (derived from the negative battery (VBAT) in the bias network) is applied to the input of the amplifier. Hence, the tip feed DC level is at -4V. The principal reason for this offset is to accommodate sourcing and sinking of longitudinal noise currents up to 15mARMS without saturating the amplifier output and to provide sufficient overhead for receive signals. The tip feed amplifier also feeds the ring feed amplifier, which is configured as a unity gain inverting amplifier as seen from the tip feed amplifier. The noninverting input to the ring feed amp is biased at a VBAT/2. Looking into this terminal the amplifier has a noninverting gain of 2. Thus, the DC output at ring feed is: VRF(DC) = (4 + VBAT) Volts For a -24V battery, VRF = -20V. Hence, the nominal battery feed across the loop provided by the SLIC is 16V. When the subscriber goes off-hook this DC feed causes current (metallic current) to flow around the loop. Va + ∆IL TIP RB1 TIP FEED 150Ω The received audio signal RX is fed into the tip feed amplifier and appears at the tip feed terminal. It is als