NM485 Driver and NMTTL Digital Isolator

Murata's NM485 driver and NMTTL digital isolator provide isolated power to RS485 or TTL interfaces with no external components needed

Image of Murata's NMTTL Digital Isolator and NM485 DriverMurata has released the NM485D6S5MC and NMTTLD6S5MC low power electrically isolated data communication devices to provide RS485 or TTL interfaces with isolated power. No external components are needed; a single 5 V supply allows function on either side of the isolation boundary. With the combination of isolated data communication and power in a single module, the devices save space and design time.

The NM485D6S5MC is designed for single-channel full duplex data communication or multipoint bus transmission. The device combines a tristate differential line driver and a differential input line receiver. The driver and receiver have active high and active low enables respectively that can be connected to function as direction control. It is designed for industrial applications with an operating temperature range from -40°C to +85°C and a tested isolation of 3 kVAC(RMS) in a surface-mount package measuring only 18.16 mm x 14.5 mm. Single-channel full duplex isolation is provided for the NM485; the device has UL60950 approval pending for reinforced insulation to 250 VAC.

The NMTTLD6S5MC provides quad-channel digital isolation for NMTTL with two transmit and two receive lines for data rates up to 25 Mbps. It is also designed for industrial applications and features an operating temperature range from -40°C to +95°C and a tested isolation of 1500 VAC(RMS) in a surface-mount package measuring only 16.9 mm x 14.5 mm. The device has UL60950 approval pending for basic insulation to 250 VAC.

Both devices provide a regulated 5 V output for digital circuitry, as well as unregulated ±6 V isolated outputs for powering analog circuitry, A/D, or op amps. Both devices have ANSI/AAMI ES60601-1, 2x MOOPs (NMTTL has just one) and 1x MOPPs safety recognition at 250 VAC, offering ease of system approval for medical systems safety approval purposes. The devices’ very low coupling capacitance figure of 5 pF typical reduces system EMI problems.

Features

NM485D6S5MC

  • UL60950 recognition pending for 250 VRMS reinforced insulation
  • ANSI/AAMI ES60601-1, 2x MOOP, 1x MOPP recognition pending
  • Patents pending
  • SMD compatible
  • +6 V unregulated and +5 V regulated isolated outputs
  • Differential driver and receiver
  • 500 kbps data rate
  • Complies with ANSI TIA/EIA RS-485-A-1998 and ISO 8482:1987(E)
  • -40ºC to +85ºC industrial temperature range
  • Tested at 3000 VAC(RMS) hipot test

NMTTLD6S5MC

  • UL60950 recognition pending for 250 VRMS basic insulation
  • ANSI/AAMI ES60601-1, 1x MOOP recognition pending
  • RoHS compliant
  • SMD compatible
  • +6 V unregulated and +5 V regulated isolated outputs
  • TTL signal isolator
  • 2 outgoing/2 incoming data lines
  • 25 Mbps data rate
  • -40ºC to +95ºC industrial temperature range
  • Tested at 1500 VAC(RMS) hipot test

NM485D6S5MC Driver

ImageManufacturer Part NumberDescriptionChannel TypeVoltage - IsolationAvailable QuantityView Details
NM485D6S5MC-R7 datasheet linkDIGITAL ISOLATOR 3KV RS485NM485D6S5MC-R7DIGITAL ISOLATOR 3KV RS485Bidirectional3000VAC46 - Immediate
NM485D6S5MC-R7 product page link

NMTTLD6S5MC Digital Isolator

ImageManufacturer Part NumberDescriptionChannel TypeVoltage - IsolationAvailable QuantityView Details
NMTTLD6S5MC-R7 datasheet linkDGTL ISO 1.5KV GEN PURPNMTTLD6S5MC-R7DGTL ISO 1.5KV GEN PURPUnidirectional1500VAC78 - Immediate
NMTTLD6S5MC-R7 product page link
Published: 2017-07-24