Balanced PBX/Key System SLIC/ Subscriber Line Interface Circuit

HC5503T Data Sheet June 1998 File Number 4506 Balanced PBX/Key System SLIC, Subscriber Line Interface Circuit The Intersil HC5503T is a low cost Subscriber Line Interface Circuit (SLIC) that replaces the components of a discrete Transformer Analog circuit design. The monolithic integrated design provides improved performance and system reliability. The HC5503T provides: Current limited DC feed to the subscriber loop, maintains a flat frequency response over the voice band and beyond, has self resetting thermal protection that allows conversation to continue while the fault is present, provides a TTL subscriber off hook indication even in the presence of longitudinal currents, and limits system power consumption on short loops. The HC5503T provides balanced 2-wire transmission and has excellent longitudinal balance, while providing on hook transmission and longitudinal current rejection in both the on-hook or off-hook conditions. The SLIC needs only one +5V supply in addition to the main battery supply for loop current and operates over a range of battery voltages (-24V to -58V). Available in 22PDIP AND 24SO packaging. The HC5503T is ideally suited as a replacement for discrete line circuits in low cost analog PABXs, small Office/Home Office products or Small Key Systems. Features • Monolithic Integrated Device • Controlled Supply of Battery Feed Current for Short Loops (30mA) • Single +5V Supply • Allows Interfacing With All Ringing Systems • Switch Hook Detection • Compatible With Worldwide PBX Performance Requirements • Low Power Consumption During Standby Applications • PBX Switches (Analog, Digital or ISDN) • Key Telephone Systems (KTS) • ISDN PC Plug in Modems • ISDN Small Office / Home Office (SOHO) Terminal Adapters (TA) • CTI (Computer Telephony Integration) Products Ordering Information PART NUMBER HC5503TCP HC5503TCB TEMP. RANGE (oC) 0 to 75 0 to 75 PACKAGE 22 Ld PDIP 24 Ld SOIC PKG. NO. E22.4 M24.3 Block Diagram BGND TIP RING C1 TF RF LOOP FEED SPEECH CIRCUIT TX RX VBAT LOOP DETECTOR SHD BIAS RS VCC AGND DGND 50 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 HC5503T Absolute Maximum Ratings (Note 1) Maximum Continuous Supply Voltages (VBAT). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -60 to 0.5V (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 7V (VCC - VBAT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75V Relay Drive Voltage (VRD) . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 15V Thermal Information Thermal Resistance (Typical, Note 2) θJA (oC/W) PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Maximum Junction Temperature (Plastic Package) . . . . . . . . .150oC Maximum Storage Temperature Range . . . . . . . . . . -65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . .300oC (SOIC - Lead Tips Only) Operating Conditions Temperature Range HC-5503T-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0oC to 75oC Positive Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . 4.75V to 5.25V Negative Supply Voltage (VBAT) . . . . . . . . . . . . . . . . . .-24V to -58V 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 PARAMETER Off Hook IB+ Off Hook IBOff Hook Loop Current Off Hook Loop Current Off Hook Loop Current Switch Hook Detection Threshold Unless Otherwise Specified, VBAT = -48V, VCC = 5V, AG = BG = DG = 0V, Typical Parameters TA = 25oC. Min-Max Parameters are Over Operating Temperature Range CONDITIONS RL = 600Ω, TA = 25oC RL = 600Ω RL = 1200Ω RL = 1200Ω, VBAT = -42V, TA = 25oC RL = 200Ω SHD = VOL SHD = VOH MIN 17.5 25.5 10 0 1VRMS 200Hz - 3400Hz, (Note 3) IEEE Method 0oC ≤ TA ≤ 75oC TYP 21 30 MAX 5.3 39 34.5 5 5 UNITS mA mA mA mA mA mA mA µs Dial Pulse Distortion Longitudinal Balance 2-Wire Off Hook 2-Wire On Hook Tip and Ring to TX, Off Hook Insertion Loss 2-Wire to TX, RX to 2-Wire Frequency Response 200 - 3400Hz Referenced to Absolute Loss at 1kHz and 0dBm Signal Level (Note 3) (Note 3) At 1kHz, 0dBm Input Level, Referenced 600Ω - 65 63 58 ±0.05 ±0.02 ±0.2 ±0.05 dB dB dB - dB dB Idle Channel Noise 2-Wire to TX, RX to 2-Wire - 1 -89 40 5 -85 - dBrnC dBm0p dB Trans Hybrid Loss RX to TX Overload Level, 2-Wire to TX, RX to 2-Wire Balance Network Set Up for 600Ω Termination at 1kHz - VCC = +5V, (Note 3) 2.5 - - VPeak 51 HC5503T Electrical Specifications PARAMETER Level Linearity 2-Wire to TX, RX to 2-Wire Unless Otherwise Specified, VBAT = -48V, VCC = 5V, AG = BG = DG = 0V, Typical Parameters TA = 25oC. Min-Max Parameters are Over Operating Temperature Range (Continued) CONDITIONS At 1kHz, (Note 3) 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 Logic Input Current (RS, RC) Logic Inputs (RS, RC) Logic ‘0’ VIL Logic ‘1’ VIH Logic Output (SHD) Logic ‘0’ VOL Logic ‘1’ VOH NOTES: 3. 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. ILOAD 800µA, VCC = 5V ILOAD 40µA, VCC = 5V 2.7 0.1 0.5 5.0 V V 2.0 0.8 5.5 V V 0V ≤ VIN ≤ 5V (Note 3) 200 - 3400kHz, RL = 600Ω 40 40 40 40 ±100 dB dB dB dB µA ±0.05 ±0.1 ±0.3 dB dB dB MIN TYP MAX UNITS Pinouts HC5503T (PDIP) TOP VIEW TIP RING VCC C1 DGND RS N/C TF RF 1 2 3 4 5 6 7 8 9 22 TX 21 AGND 20 N/C 19 RX 18 T3 17 T2 16 T1 15 N/C 14 N/C 13 N/C 12 SHD TIP RING VCC N/C C1 DGND RS N/C TF 1 2 3 4 5 6 7 8 9 HC5503T (SOIC) TOP VIEW 24 TX 23 AGND 22 N/C 21 RX 20 T3 19 T2 18 T1 17 N/C 16 N/C 15 N/C 14 N/C 13 SHD VBAT 10 BGND 11 RF 10 VBAT 11 BGND 12 52 HC5503T Pin Descriptions 22 PIN PDIP 1 24 PIN SOIC 1 SYMBOL TIP DESCRIPTION An analog input connected to the TIP (more positive) side of the subscriber loop through a 150Ω feed resistor. Functions with the Ring terminal to receive voice signals from the telephone and for loop monitoring purposes. An analog input connected to the RING (more negative) side of the subscriber loop through a 150Ω feed resistor. Functions with the Tip terminal to receive voice signals from the telephone and for loop monitoring purposes. Positive Voltage Source - Most positive supply. VCC is typically 5V. No Connect. For proper operation this pin should be left floating. Capacitor - An external capacitor to be connected between this terminal and analog ground. Required for proper operation of the voice band hybrid. Typical value is 0.3µF, 30V. Digital Ground - To be connected to zero potential and serves as a reference for all digital inputs and outputs on the SLIC microcircuit. This pin should be tied to 5V. No Connect. For proper operation this pin should be left floating. Tip Feed - A low impedance analog output connected to the TIP terminal through a 150Ω feed resistor. Provides voice signals to the telephone set and sink longitudinal current. Ring Feed - A low impedance analog output connected to the RING terminal through a 150Ω feed resistor. Functions with the TF terminal to provide loop current, feed voice signals to the telephone set, and sink longitudinal current. Negative Voltage Source - Most negative supply. VBAT has an operational range of -24V to -58V. Frequently referred to as “battery”. Battery Ground - To be connected to zero potential. All loop current and some quiescent current flows into this ground terminal. Switch Hook Detection - A low active LS TTL - compatible logic output. This output is enabled for loop currents exceeding 10mA and disabled for loop currents less than 5mA. No Connect. For proper operation this pin should be left floating. No Connect. For proper operation this pin should be left floating. No Connect. For proper operation this pin should be left floating. No Connect. For proper operation this pin should be left floating. Used during production testing. For proper operation this pin should be connected to pin T2. Used during production testing. For proper operation this pin should be connected to pin T1. Used during production testing. For proper operation this pin should be connected to Analog Ground pin AGND. Receive Input - A high impedance analog input which is internally biased. Capacitive coupling to