My Inquiry
My Account
Renesas ISL5585ECMZ
- Part No.:
- ISL5585ECMZ
- Manufacturer:
- Renesas
- Category:
- Telecom
- Package:
- 28-LCC (J-Lead)
- Datasheet:
-
ISL5585ECMZ.pdf
- Description:
- IC SLIC RINGING 3.3V VOB 28-PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,748
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL5585ECMZ from Renesas (formerly Intersil) is a 3.3V ringing subscriber line interface circuit (SLIC) designed for voice-over-broadband systems requiring analog POTS support on short-to-medium loops. It operates with −75V high battery supply, delivers balanced/unbalanced ringing up to 67VRMS, achieves 53dB longitudinal balance in Forward Active mode, and consumes only 65mW standby power at 75V - enabling compact VoIP gateways and FTTH remote units.
For engineers reviewing the ISL5585ECMZ datasheet, ISL5585ECMZ pinout, ISL5585ECMZ application, or ISL5585ECMZ equivalent, key selection factors include its −75V VBH rating, PLCC-28 Pb-free package, 0°C to 75°C commercial temperature grade, programmable transient current limit, and integrated ring trip/switch hook detection for reliable loop supervision.
Technical Context
The ISL5585ECMZ implements bipolar-DI process-based analog front-end architecture with dual independent tip/ring amplifiers, programmable DC loop current limiting (15–45mA), and transient current limiting (40–100mA sink/source). Its 3-wire parallel control interface (F2/F1/F0) selects eight operating modes including Forward Active, Ringing, Tip Open, and Power Denial - all managed via TTL-compatible logic inputs.
It integrates dedicated analog blocks for impedance matching (via RS and CFB), longitudinal balance optimization (53dB min), and AC transmission performance across 300Hz–3.4kHz with <±0.025dB level linearity. Supervisory functions include thermal shutdown alarm (ALM), detector output multiplexing (DET/E0), and silent polarity reversal - all without external relays or discrete protection components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | +3.3V ±10% - enables direct connection to standard low-voltage digital rails without LDO overhead. |
| High Battery Supply (VBH) | −75V ±10% - supports extended loop lengths up to 5,000 ft (500Ω) while maintaining ringing voltage headroom. |
| Standby Power Dissipation | 65mW at VBH = −75V - reduces thermal load in densely packed access platforms and passive cooling designs. |
| Longitudinal Balance | 53dB (300Hz–1kHz, Forward Active) - meets ITU-T G.961 requirements for echo suppression in VoIP terminals. |
| Ringing Output Voltage | 67VRMS (balanced), 33.5VRMS (unbalanced) - drives standard telephone ringers without external step-up transformers. |
| Loop Current Limit Range | 15–45mA (programmed via RIL) - accommodates diverse off-hook loads from legacy phones to modern IP handsets. |
| Transient Current Limit | 40–100mA (programmed via RTL) - prevents damage during lightning surges (GR-1089-CORE Level 1) and ground faults. |
Pinout & Package
ISL5585ECMZ uses a 28-lead plastic leaded chip carrier (PLCC) package compliant with JEDEC MO-220, Pb-free (RoHS), with 1.27mm pitch and body size 11.5mm × 11.5mm. The package features internal thermal path to BGND and supports reflow soldering per IPC/JEDEC J-STD-020C.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| TIP | Tip amplifier output | Drives telephone line tip terminal; capable of ±53V swing relative to VBH in active modes. |
| RING | Ring amplifier output | Drives telephone line ring terminal; synchronized with TIP for balanced ringing waveform generation. |
| VBH | High battery supply input | Accepts −75V rail; powers tip/ring amplifiers and internal bias circuits - defines maximum ringing voltage capability. |
| VBL | Low battery supply input | Accepts −16V to −52V; used for low-power standby and reverse-active operation. |
| BSEL | Battery select control | TTL input selecting VBH (logic '1') or VBL (logic '0') for amplifier bias - enables dual-supply flexibility. |
| F2/F1/F0 | Mode control inputs | 3-bit parallel interface selecting among 8 operational states including Ringing, Forward Active, and Tip Open. |
| DET | Detector output | TTL-level latched output indicating on-hook/off-hook status or ring trip event - multiplexed via E0 pin. |
| ALM | Thermal alarm output | Open-drain signal asserted when junction temperature exceeds ~175°C - triggers system-level thermal shutdown. |
| ILIM | Loop current limit programming | Connects external resistor (39–117kΩ) to set DC loop current limit between 15–45mA with ±8.5% accuracy. |
| TL | Transient current limit programming | Connects external resistor (16.5–41.25kΩ) to set peak source/sink current limit between 40–100mA. |
| RT | Ring trip filter network | RC network setting response time for ring trip detection - ensures reliable detection during ringing bursts. |
| POL | Polarity reversal timing | External capacitor sets silent polarity reversal duration - avoids audible click during call setup/teardown. |
Key Features
| Feature | Design Value |
|---|---|
| Onboard ringing generation | Eliminates need for external transformer or discrete H-bridge - reduces BOM count by ≥4 components and PCB area by >25mm². |
| Programmable transient current limit | Enables precise surge current clamping during GR-1089-CORE lightning events without sacrificing normal off-hook current delivery. |
| Silent polarity reversal | Capacitor-controlled timing prevents audible transients during polarity switch - critical for carrier-grade voice quality compliance. |
| Integrated MTU DC characteristics | Meets Telcordia GR-909 requirements for metering pulse compatibility and on-hook transmission without external circuitry. |
| Thermal shutdown with alarm indicator | ALM pin provides early warning before forced shutdown - allows host MCU to log fault condition and initiate graceful recovery. |
Applications
| VoIP Gateway | FTTH Remote Terminal |
|---|---|
Use Scenario: Residential VoIP gateway supporting up to 4 analog phone lines with simultaneous ringing and call handling. IC Role / Device Role / Timing Role: SLIC providing line feeding, ringing, supervision, and impedance matching for each POTS port. Use Value: Enables single-chip per-line implementation with −75V VBH support, reducing bill-of-materials cost by $1.20/unit versus discrete solutions. | Use Scenario: Fiber-to-the-home node delivering voice service over coaxial or twisted-pair drop cables up to 5,000 ft. IC Role / Device Role / Timing Role: Line interface IC managing battery feed, longitudinal balance, and ring trip detection in passive optical network (PON) terminals. Use Value: 53dB longitudinal balance and 67VRMS ringing ensure interoperability with legacy telephony infrastructure without external baluns. |
| DSL Modem Voice Port | IP-PBX Analog Extension |
Use Scenario: Integrated DSL modem with built-in analog telephony adapter (ATA) for bundled broadband/voice service. IC Role / Device Role / Timing Role: Subscriber line interface handling 2-wire/4-wire conversion, transmit/receive isolation (>80dB), and pulse metering. Use Value: On-chip pulse metering and on-hook transmission meet ANSI T1.413 and TR-NWT-000102 requirements without external logic. | Use Scenario: Enterprise IP-PBX supporting analog desk phones via centralized FXS modules. IC Role / Device Role / Timing Role: Centralized SLIC providing centralized battery feed, ring generation, and loop supervision for up to 24 ports. Use Value: Low 65mW standby power enables fanless chassis design for quiet office environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SLIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL5585ECM | Same electrical specs and pinout, but Pb-containing (non-RoHS) PLCC-28 package. | Not suitable for EU/China RoHS-regulated deployments; identical thermal and functional behavior. | Select ISL5585ECM only if Pb-free compliance is not required and legacy inventory reuse is prioritized. |
| ISL5585FCMZ | Higher VBH rating (−85V), same PLCC-28 Pb-free package, 0°C to 85°C temp range. | Supports longer loops (up to ~6,500 ft) and wider ambient operating range - requires updated thermal derating analysis. | Choose ISL5585FCMZ when extending loop reach beyond 5,000 ft or operating in uncontrolled temperature environments. |
Compared with ISL5585ECMZ, ISL5585ECM offers identical functionality without RoHS compliance, while ISL5585FCMZ extends loop reach and temperature range at the cost of higher VBH-related component stress - making ISL5585ECMZ optimal for cost-sensitive, RoHS-mandated, medium-loop VoIP applications.
Availability
ISL5585ECMZ is available at Aetrix Electronics and suitable for VoIP gateways, FTTH remote terminals, and DSL modem voice ports requiring stable component supply, RoHS-compliant manufacturing, and long-term lifecycle support.
Supply support for ISL5585ECMZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics Corporation acquired Intersil in 2017 and maintains full support for legacy SLIC products. Renesas is a global semiconductor leader focused on embedded processing, analog, and power solutions.
The ISL5585 family was developed specifically for voice-over-broadband infrastructure, targeting cost-effective, low-power, high-reliability analog line interface in customer premise equipment for VoIP, cable, and DSL markets.
FAQ
What is the maximum ringing voltage supported by the ISL5585ECMZ?
The ISL5585ECMZ supports up to 67VRMS open-circuit balanced ringing voltage when driven with a 0.840VRMS VRS input under −75V VBH conditions. This meets GR-909 Class B ringing requirements and drives standard electromechanical ringers without external amplification. The actual delivered voltage depends on line impedance and battery regulation - ISL5585ECMZ maintains this output level across loop impedances up to 500Ω.
Does the ISL5585ECMZ require external components for basic operation?
Yes, the ISL5585ECMZ requires external resistors for loop current limit (RIL), transient current limit (RTL), switch hook detection (RSH), and ring trip detection (RRT), plus capacitors for CDC, CFB, and POL. However, it eliminates external transformers, relays, and discrete protection devices - reducing total external part count to ≤12 passive components per channel versus >25 in legacy designs. All critical functions remain fully integrated within the ISL5585ECMZ die.
How does the ISL5585ECMZ handle thermal protection?
The ISL5585ECMZ incorporates internal thermal shutdown that activates at approximately 175°C junction temperature, asserting the ALM pin low to signal fault condition. Once triggered, the device powers down tip/ring amplifiers while retaining logic interface functionality. Recovery requires cycling VCC or changing operating mode. The ALM signal enables host microcontroller monitoring - ISL5585ECMZ's 55°C/W θJA (PLCC) allows safe operation up to 75°C ambient with minimal heatsinking in typical VoIP gateway layouts.
Can the ISL5585ECMZ operate with both −75V and −24V battery supplies?
Yes, the ISL5585ECMZ supports dual battery operation via the BSEL pin: logic high selects VBH (−75V) for ringing and forward active modes, while logic low selects VBL (−16V to −52V) for low-power standby and reverse-active operation. This enables dynamic power optimization - e.g., using −75V for ringing bursts and switching to −24V for idle supervision, reducing average power consumption by up to 40% compared to fixed −75V biasing. The ISL5585ECMZ maintains full functionality across both rails without external switching circuitry.
What is the longitudinal balance performance of the ISL5585ECMZ in Forward Active mode?
In Forward Active mode, the ISL5585ECMZ delivers 53dB minimum longitudinal balance from 300Hz to 1kHz and 53dB minimum from 1kHz to 3.4kHz - meeting ITU-T G.961 Annex A requirements for echo cancellation in VoIP systems. This specification applies specifically to ISL5585ECMZ (Grade E), which is validated per IEEE 455-1985 with 368Ω per tip/ring terminal. Higher-grade variants (A/B) offer 58dB, but ISL5585ECMZ's 53dB is sufficient for most residential and SMB voice deployments.
ISL5585ECMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-LCC (J-Lead)
- Packaging:
- Bag
- Product Status:
- Obsolete
- Function:
- Subscriber Line Interface Concept (SLIC)
- Interface:
- -
- Number of Circuits:
- 1
- Voltage - Supply:
- 3.3V
- Current - Supply:
- -
- Power (Watts):
- 305 mW
- Operating Temperature:
- 0°C ~ 75°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-PLCC (11.51x11.51)
ISL5585ECMZ FAQ
1.How can I place an order for ISL5585ECMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL5585ECMZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL5585ECMZ reliable?
The price and inventory of ISL5585ECMZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL5585ECMZ is usually 5 days.
3.What payment methods are accepted for ISL5585ECMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL5585ECMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL5585ECMZ?
ISL5585ECMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL5585ECMZ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL5585ECMZ?
For technical support, including ISL5585ECMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL5585ECMZ requirements.
6.How does Aetrix verify that ISL5585ECMZ is sourced from the original manufacturer or authorized distributors?
All ISL5585ECMZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL5585ECMZ meets industry standards.
7.What is the process for return or replacement of ISL5585ECMZ?
All ISL5585ECMZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL5585ECMZ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL5585ECMZ part is unused and in its original packaging.
Return procedure for ISL5585ECMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL5585ECMZ Tags
-
LMC567CMX/NOPB
Texas Instruments
-
LM567CMX/NOPB
Texas Instruments
-
LM567CM/NOPB
Texas Instruments
-
VSC8531XMW-02
Microchip Technology
-
VSC8531XMW-05
Microchip Technology
-
GPY115C0VI
MaxLinear, Inc.
-
SI32185-A-FMR
Skyworks Solutions Inc.
-
VSC8541XMV-05
Microchip Technology
-
SI32178-B-FM1R
Skyworks Solutions Inc.
-
GPY215C0VI
MaxLinear, Inc.
-
CPC7514ZTR
Littelfuse Inc.
-
VSC8502XML-03
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
