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LTC2854IDD#TRPBF

Public Made by Adom

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Analog Devices RS-485 / RS-422 ICs, DFN-10-EP(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LTC2854IDD#TRPBF

Analog Devices · RS-485 / RS-422 ICs · DFN-10-EP(3x3)

LTC2854IDD#TRPBF from Analog Devices, in a DFN-10-EP(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 RO output Receiver Output: with the receiver enabled (RE low), RO is high when A > B by 200mV and low when A < B by 200mV, and it is high if the inputs are open, shorted, or terminated without a signal.
2 RE input Receiver Enable: a low enables the receiver, and a high forces the receiver output into a high-impedance state.
3 DE input Driver Enable: a high enables the driver, a low forces the driver outputs into high impedance, and if RE is high with DE and TE low the part enters a low-power shutdown state.
4 DI input Driver Input: with the driver enabled (DE high), a low on DI drives the positive driver output low and the negative output high, and a high drives the positive output high and the negative output low.
5 TE input Internal Termination Resistance Enable: a high connects a termination resistor (120Ω typical) between pins A and B.
6 GND power_in Ground reference for the device.
7 NC unconnected No connection.
8 A bidirectional Positive receiver input and, on the half-duplex LTC2854, positive driver output; the receiver input resistance is greater than 96kΩ when termination is disabled (C-, I-Grade).
9 B bidirectional Negative receiver input and, on the half-duplex LTC2854, negative driver output; the receiver input resistance is greater than 96kΩ when termination is disabled (C-, I-Grade).
10 VCC power_in Positive supply, 3.0V < VCC < 3.6V; bypass with a 0.1µF ceramic capacitor.
11 GND power_in Exposed backside thermal pad, connected to ground; the datasheet specifies the PCB GND connection for this pad.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package DFN-10-EP(3x3)
Category Interface
Pins 11

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Differential driver output voltage, R = ∞ /VOD/ 1.5 V R = ∞, VCC = 3V (Figure 1) 3
Differential driver output voltage, R = 27Ω /VOD/ 2 V R = 27Ω, VCC = 3V (Figure 1) 3
Change in magnitude of driver differential output voltage for complementary states D/VOD/ 0.2 V R = 27Ω or R = 50Ω (Figure 1) 3
Driver common mode output voltage VOC 3 V R = 27Ω or R = 50Ω (Figure 1) 3
Change in magnitude of driver common mode output voltage for complementary states D/VOC/ 0.2 V R = 27Ω or R = 50Ω (Figure 1) 3
Maximum driver short-circuit current IOSD -250 180 300 mA -7V ≤ (Y or Z) ≤ 12V (Figure 2) 3
Receiver input current (A, B), C-, I-Grade, VIN = 12V IIN 125 µA DE = TE = 0V, VCC = 0V or 3.3V, VIN = 12V (Figure 3) (C-, I-Grade) 3
Receiver input current (A, B), C-, I-Grade, VIN = -7V IIN -100 µA DE = TE = 0V, VCC = 0V or 3.3V, VIN = -7V (Figure 3) (C-, I-Grade) 3
Receiver input resistance (C-, I-Grade) RIN 96 125 kΩ RE = VCC or 0V, DE = TE = 0V, VIN = -7V, -3V, 3V, 7V, 12V (Figure 3) (C-, I-Grade) 3
Receiver differential input threshold voltage VTH -0.2 0.2 V -7V ≤ B ≤ 12V 3
Receiver output HIGH voltage VOH 2.4 V I(RO) = -4mA, A-B = 200mV, VCC = 3V 3
Receiver output LOW voltage VOL 0.4 V I(RO) = 4mA, A-B = -200mV, VCC = 3V 3
Receiver three-state output current on RO IOZR -1 1 µA RE = VCC, 0V ≤ RO ≤ VCC 3
Receiver short-circuit current IOSR -85 85 mA 0V ≤ RO ≤ VCC 3
Receiver input terminating resistor RTERM 108 120 156 Ω TE = VCC, VAB = 2V, VB = -7V, 0V, 10V (Figure 8) 3
Logic input high voltage VIH 2 V VCC = 3.6V 3
Logic input low voltage VIL 0.8 V VCC = 3V 3
Logic input current IINL -10 0 10 µA 3
Supply current in shutdown mode (C-, I-Grade) ICCS 0 5 µA DE = 0V, RE = VCC, TE = 0V (C-, I-Grade) 3
Supply current in receive mode ICCR 370 900 µA DE = 0V, RE = 0V, TE = 0V 3
Maximum data rate fMAX 20 Mbps Note 3 4
Driver input to output propagation delay tPLHD, tPHLD 10 50 ns RDIFF = 54Ω, CL = 100pF (Figure 4) 4
Driver input to output propagation delay difference DtPD 1 6 ns RDIFF = 54Ω, CL = 100pF (Figure 4) 4
Driver output Y to output Z skew tSKEWD -6 1 6 ns RDIFF = 54Ω, CL = 100pF (Figure 4) 4
Driver rise or fall time tRD, tFD 4 12.5 ns RDIFF = 54Ω, CL = 100pF (Figure 4) 4
Driver enable or disable time tZLD, tZHD, tLZD, tHZD 70 ns RL = 500Ω, CL = 50pF, RE = 0 (Figure 5) 4
Driver enable from shutdown tZHSD, tZLSD 8 µs RL = 500Ω, CL = 50pF, RE = VCC (Figure 5) 4
Time to shutdown tSHDN 100 ns RL = 500Ω, CL = 50pF (DE = ↓, RE = VCC) or (DE = 0, RE ↑) (Figure 5) 4
Receiver input to output propagation delay tPLHR, tPHLR 50 70 ns CL = 15pF, VCM = 1.5V, /VAB/ = 1.5V, tR and tF < 4ns (Figure 6) 4
Differential receiver skew tSKEWR 1 6 ns CL = 15pF (Figure 6) 4
Receiver output rise or fall time tRR, tFR 3 12.5 ns CL = 15pF (Figure 6) 4
Receiver enable/disable time tZLR, tZHR, tLZR, tHZR 50 ns RL = 1k, CL = 15pF, DE = VCC (Figure 7) 4
Receiver enable from shutdown tZHSR, tZLSR 8 µs RL = 1k, CL = 15pF, DE = 0V (Figure 7) 4
Termination enable or disable time tRTEN, tRTZ 100 µs VB = 0V, VAB = 2V, RE = VCC, DE = 0V (Figure 8) 4
Supply current in transmit mode ICCT 450 1000 µA No Load, DE = VCC, RE = VCC, TE = 0V 4
Supply current with driver and receiver enabled ICCTR 450 1000 µA No Load, DE = VCC, RE = 0V, TE = 0V 4
Supply current in termination mode ICCTERM 110 180 µA DE = 0V, RE = VCC, TE = VCC 4
Supply current in receive and termination mode ICCTERMR 450 950 µA DE = 0V, RE = 0V, TE = VCC 4
Supply current in transmit and termination mode ICCTERMT 470 1000 µA DE = VCC, RE = VCC, TE = VCC 4
Supply current with driver, receiver and termination enabled ICCTERMTR 470 1000 µA DE = VCC, RE = 0V, TE = VCC 4
ESD protection, RS485/RS422 pins A, B (LTC2854) -25 25 kV Human body model 4
Supply voltage VCC -0.3 7 V 2
Logic input voltages (RE, DE, DI, TE) -0.3 7 V 2
Interface I/O voltage (A, B, Y, Z) 15 V Lower limit printed as (VCC -15V) 2
(A-B) or (B-A) differential voltage with terminator enabled 6 V Terminator enabled 2
Receiver output voltage (RO) -0.3 V Upper limit printed as (VCC +0.3V) (Note 1) 2
Operating temperature, LTC2854I -40 85 °C Note 4 2
Storage temperature range -65 150 °C 2
Maximum junction temperature TJMAX 150 °C DD package 2
Supply voltage operating range VCC 3 3.6 V Pin functions text: VCC = 3.0V < VCC < 3.6V 8
Junction-to-ambient thermal resistance θJA 43 °C/W DD package 2
Junction-to-case thermal resistance θJC 2.96 °C/W DD package 2

CAD (KiCad official)

  • Symbol: LTC2854IDD#TRPBF
  • Footprint: Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.55x2.48mm
  • 3D model: DFN-10-EP(3x3) (KiCad packages3D, STEP)
  • 3D model files: ltc2854idd-trpbf-etched.step / ltc2854idd-trpbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ltc2854idd-trpbf.step / ltc2854idd-trpbf.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Analog Devices datasheet (18 pp, sha256 78130b7ef684fd8c, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF