ISL8485E

ESD Protected to ±15kV, 5V, Low Power, High SpeedRate Limited, RS-485/RS-422 Transceivers

OVERVIEW

The ISL8483E and ISL8485E are ESD protected, BiCMOS 5V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. Each driver output/receiver input is protected against ±15kV ESD strikes without latch-up. Unlike competitive devices, this Renesas family is specified for 10% tolerance supplies (4.5V to 5.5V).

The ISL8483E uses slew rate limited drivers that reduce EMI and minimize reflections from improperly terminated transmission lines or unterminated stubs in multidrop and multipoint applications.

Data rates up to 10Mbps are achievable by using the ISL8485E, which features higher slew rates.

Both devices present a “single unit load” to the RS-485 bus, which allows up to 32 transceivers on the network.

Receiver (Rx) inputs feature a “fail-safe if open” design, which ensures a logic high Rx output if Rx inputs are floating.

Driver (Tx) outputs are short-circuit protected even for voltages exceeding the power supply voltage. Additionally, on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive.

These half duplex configurations multiplex the Rx inputs and Tx outputs to allow transceivers with Rx and Tx disable functions in 8 Ld packages.

KEY FEATURES

  • Pb-Free (RoHS compliant)
  • Extended industrial temperature options (+125°C)
  • RS-485 I/O pin ESD protection: ±15kV HBM
  • Class 3 ESD level on all other pins: >7kV HBM
  • Specified for 10% tolerance supplies
  • High data rate version (ISL8485E): up to 10Mbps
  • Slew rate limited version for error free data transmission (ISL8483E): up to 250kbps
  • Single unit load allows up to 32 devices on the bus
  • 1nA low current Shutdown mode (ISL8483E)
  • Low quiescent current:
  • 160μA (ISL8483E)
  • 500μA (ISL8485E)
  • -7V to +12V common-mode input voltage range
  • Three-state Rx and Tx outputs
  • 30ns propagation delays, 5ns skew (ISL8485E)
  • Operate from a single +5V supply (10% tolerance)
  • Current limiting and thermal shutdown for driver overload protection

PARAMETRICS

Parameters
ISL8485E
Basic Information
Production Status
量産中
主な特長
Low Cost
Tx数
1
Rx数
1
バス上の許容デバイス数
32
半二重/全二重
Half
高ESD保護
Yes
ホットプラグ
No
データレート
10 Mbps
電源電圧Vcc (V) (min)
4.5
電源電圧Vcc (V) (max)
5.5
スルーレート制限
No
Tx/Rxイネーブル
Yes
IS イネーブル/ディセーブル
700/500 µA
SHDN ICC
N/A µA
VLピン
No
認定レベル
Standard
電源電圧Vcc範囲 (V)
4.5 to 5.5
CANサンプル
YES
温度範囲
-40 to +125

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