texas_instruments_SN65HVD1781DR module

Texas Instruments SN65HVD1781DR RS-485 Transceiver

Component definition for Texas Instruments SN65HVD1781DR 3.3V RS-485 transceiver with reference circuit implementation including bypass capacitors, pull-up resistors, and TVS protection.

class CapsuleSmdPad

Bases: Pad

shape: Shape | PadShape = Polygon(elements=((0.294, 1.0225), (-0.294, 1.0225), (-0.294, -1.0225), (0.294, -1.0225)), holes=())

The geometric shape of the pad or a PadShape to specify the regular shape and the shape when non-functional pads are removed. Can be overridden on a per-layer basis by shapes.

solder_mask = [Soldermask(shape=Polygon(elements=((0.345, 1.0735), (-0.345, 1.0735), (-0.345, -1.0735), (0.345, -1.0735)), holes=()), side=<Side.Top: 0>)]

paste = [Paste(shape=Polygon(elements=((0.345, 1.0735), (-0.345, 1.0735), (-0.345, -1.0735), (0.345, -1.0735)), holes=()), side=<Side.Top: 0>)]

class LandpatternSOIC_8_L4_9_W3_9_P1_27_LS6_0_BL

Bases: Landpattern

name = 'SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL'

p = {1: CapsuleSmdPad().at((-1.905, -2.7725)), 2: CapsuleSmdPad().at((-0.635, -2.7725)), 3: CapsuleSmdPad().at((0.635, -2.7725)), 4: CapsuleSmdPad().at((1.905, -2.7725)), 5: CapsuleSmdPad().at((1.905, 2.7725)), 6: CapsuleSmdPad().at((0.635, 2.7725)), 7: CapsuleSmdPad().at((-0.635, 2.7725)), 8: CapsuleSmdPad().at((-1.905, 2.7725))}

pcb_layer_reference = Silkscreen(shape=Shape[Text], side=<Side.Top: 0>)

pcb_layer_value = Custom(shape=Shape[Text], side=<Side.Top: 0>, name='Fab')

silkscreen = [Silkscreen(shape=Polyline(width=0.152, elements=[(-2.526, -1.5215), (-2.526, 1.5215), (2.526, 1.5215), (2.526, -1.5215), (-2.526, -1.5215)]), side=<Side.Top: 0>), Silkscreen(shape=ArcPolyline(width=0.3, elements=[Arc(center=(-1.905, -0.7695), radius=0.15, start=0, arc=-360)]), side=<Side.Top: 0>), Silkscreen(shape=ArcPolyline(width=0.3, elements=[Arc(center=(-2.651, -2.7725), radius=0.15, start=0, arc=-360)]), side=<Side.Top: 0>)]

custom_layer = [Custom(shape=ArcPolyline(width=0.3, elements=[Arc(center=(-1.905, -3.4005), radius=0.15, start=0, arc=-360)]), side=<Side.Top: 0>, name='Fab'), Custom(shape=ArcPolyline(width=0.06, elements=[Arc(center=(-2.45, -3.0005), radius=0.03, start=0, arc=-360)]), side=<Side.Top: 0>, name='Fab')]

courtyard = [Courtyard(shape=Polygon(elements=((2.602, 3.846), (-2.602, 3.846), (-2.602, -3.846), (2.602, -3.846)), holes=()), side=<Side.Top: 0>)]

model3ds = [<jitx.model3d.Model3D object>]

class SymbolSN65HVD1781DR

Bases: Symbol

pin_name_size: float | None = 0.7874

Font size of pin name text of Pin objects in this symbol, in grid units. If unset, defers to a parent Symbol, if a parent exists. This can be overriden at the Pin level by setting its pin_name_size attribute.

pad_name_size: float | None = 0.7874

Font size of pad name text of Pin objects in this symbol, in grid units. If unset, defers to a parent Symbol, if a parent exists. This can be overriden at the Pin level by setting its pad_name_size attribute.

R = Pin((-6, 3), 2, <Direction.Left: 'left'>)

RE_NOT = Pin((-6, 1), 2, <Direction.Left: 'left'>)

DE = Pin((-6, -1), 2, <Direction.Left: 'left'>)

D = Pin((-6, -3), 2, <Direction.Left: 'left'>)

GND = Pin((6, -3), 2, <Direction.Right: 'right'>)

A = Pin((6, -1), 2, <Direction.Right: 'right'>)

B = Pin((6, 1), 2, <Direction.Right: 'right'>)

VCC = Pin((6, 3), 2, <Direction.Right: 'right'>)

layer_reference = Shape[Text]

layer_value = Shape[Text]

draws = [Polygon(elements=((6.00001, 5.40001), (-6.00001, 5.40001), (-6.00001, -5.40001), (6.00001, -5.40001)), holes=()), Shape[Circle], Shape[Circle]]

class SN65HVD1781DR(*args, **kwargs)

Bases: Component

Texas Instruments SN65HVD1781DR 3.3V RS-485 transceiver

name = 'C42737'

description = '3.3V RS-485 transceiver with standby mode and thermal shutdown protection'

manufacturer: str | None = 'Texas Instruments'

Manufacturer for this component.

mpn: str | None = 'SN65HVD1781DR'

Manufacturer part number for this component.

datasheet = 'https://www.lcsc.com/datasheet/lcsc_datasheet_2304140030_Texas-Instruments-SN65HVD1781DR_C42737.pdf'

reference_designator_prefix: str | None = 'U'

Reference designator prefix for this component. This will be used to generate a unique reference designator for each component of the same type.

Note

This field is a required data point for matching components between builds. If this value changes (including changing from unset to set), it will be treated as a new component, even if nothing else changes.

R = Port()

Receiver output pin

RE_NOT = Port()

Receiver enable (active low)

DE = Port()

Driver enable

D = Port()

Driver input

GND = Port()

Ground

A = Port()

RS-485 A line (non-inverting)

B = Port()

RS-485 B line (inverting)

VCC = Port()

Supply voltage (3.3V)

landpattern = LandpatternSOIC_8_L4_9_W3_9_P1_27_LS6_0_BL()

symbol = SymbolSN65HVD1781DR()

cmappings = [SymbolMapping({Port(): SymbolSN65HVD1781DR().R, Port(): SymbolSN65HVD1781DR().RE_NOT, Port(): SymbolSN65HVD1781DR().DE, Port(): SymbolSN65HVD1781DR().D, Port(): SymbolSN65HVD1781DR().GND, Port(): SymbolSN65HVD1781DR().A, Port(): SymbolSN65HVD1781DR().B, Port(): SymbolSN65HVD1781DR().VCC}), PadMapping({Port(): LandpatternSOIC_8_L4_9_W3_9_P1_27_LS6_0_BL().p[1], Port(): LandpatternSOIC_8_L4_9_W3_9_P1_27_LS6_0_BL().p[2], Port(): LandpatternSOIC_8_L4_9_W3_9_P1_27_LS6_0_BL().p[3], Port(): LandpatternSOIC_8_L4_9_W3_9_P1_27_LS6_0_BL().p[4], Port(): LandpatternSOIC_8_L4_9_W3_9_P1_27_LS6_0_BL().p[5], Port(): LandpatternSOIC_8_L4_9_W3_9_P1_27_LS6_0_BL().p[6], Port(): LandpatternSOIC_8_L4_9_W3_9_P1_27_LS6_0_BL().p[7], Port(): LandpatternSOIC_8_L4_9_W3_9_P1_27_LS6_0_BL().p[8]})]

class SN65HVD1781DRReferenceCircuit

Bases: Circuit

SN65HVD1781DR RS-485 transceiver reference circuit with typical application components.

Based on Texas Instruments reference design, this circuit includes: - 3.3V power supply with 100nF bypass capacitor - 10kΩ pull-up resistors on RE and DE pins for normal operation - 10Ω series resistors on RS-485 A/B lines for impedance matching - TVS diodes for RS-485 bus protection - UART interface bundle for clean MCU connection - Proper grounding and power distribution

power = Power()

3.3V power supply

uart = UART()

UART interface for MCU communication

dir_pin = GPIO()

Direction control (optional, can be tied to DE)

rs485_a = Net(name='RS485_A')

RS-485 A line (non-inverting)

rs485_b = Net(name='RS485_B')

RS-485 B line (inverting)

Device

alias of SN65HVD1781DRReferenceCircuit