ISL5586 is a very low power ringing subscriber interface circuit designed for use with the Broadcom BCM3352 Cable Modem Chip, with on-board voiceband codecs, or other 3.3V voiceband codec devices. The ISL5586 provides on board ringing signal generation up to 95V peak supporting sinusoidal or trapezoidal waveshapes with DC offset. Loop start and ground start trunks are supported, and an open circuit DC voltage of less than 56V is maintained on the subscriber loop in the on-hook condition, in compliance with MTU operation and the safety requirements of UL-1950. Together with the Broadcom BCM3352, the ISL5586 provides resistive and complex two wire impedance matching and transhybrid balancing. Also supported are on- hook transmission of caller id signals, soft and hard polarity reversal and 12/16kHz subscriber pulse metering systems used in Europe and Asia, thereby allowing a low cost, low risk, global product design to be achieved.
The ISL5586 is a very low‑power Ringing Subscriber Interface circuit designed for use with Broadcom BCM3352 cable modem chips or other 3.3 V voiceband codec devices. It provides on‑board ringing signal generation up to 95 V peak, supports sinusoidal or trapezoidal waveforms, and maintains less than 56 V open‑circuit DC voltage on the subscriber loop in the on‑hook condition.
The device operates from a 5 V supply, supports loop current limits of 25 mA, and offers programmable features such as constant‑current loop bias, loop start/ground start detection, polarity reversal, and integrated battery switch. It is available in a 28‑lead PLCC package and complies with UL‑1950 and RoHS standards.
| On‑hook power consumption | 64 mW @ Vbh = 75 V |
|---|---|
| Maximum ringing voltage | 95 V peak |
| Package type | 28‑lead PLCC |
| Operating temperature range | -40 °C to 85 °C |
| Loop current limit | 25 mA |
| Maximum supply voltage (Vbh) | 75 V |
The device can generate a ringing signal up to 95 V peak.
It consumes 64 mW when Vbh is set to 75 V.
The device operates from –40 °C to 85 °C.
It is supplied in a 28‑lead PLCC package.