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GM3491E

Public Made by Adom

by adom

GATEMODE RS-485 / RS-422 ICs, SOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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GM3491E

GATEMODE · RS-485 / RS-422 ICs · SOP-14

GM3491E from GATEMODE, in a SOP-14. 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 N.C. unconnected No connect, not internally connected.
2 RO output Receiver output: RO is high if A > B by 200mV and low if A < B by 200mV, and it is high-impedance when RE is high.
3 RE input Receiver output enable: RO is enabled when RE is low and is high-impedance when RE is high.
4 DE input Driver output enable: outputs Y and Z are enabled when DE is high and are high-impedance when DE is low.
5 DI input Driver input: a low on DI forces Y low and Z high, and a high on DI forces Y high and Z low.
6 GND power_in Ground.
7 GND power_in Ground.
8 N.C. unconnected No connect, not internally connected.
9 Y output Non-inverting driver output; high-impedance when DE is low.
10 Z output Inverting driver output; high-impedance when DE is low.
11 B input Inverting receiver input.
12 A input Non-inverting receiver input.
13 N.C. unconnected No connect, not internally connected.
14 VCC power_in Positive supply: 3.0V ≤ VCC ≤ 5.5V; do not operate the device with VCC > 5.5V.

Key specifications

Parameter Value
Manufacturer GATEMODE
Package SOP-14
Category Interface
Pins 14

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage Range VCC 3 3.6 V 3
Differential Driver Output VOD 2 V RL = 100Ω (RS-422), Figure 4 2
Differential Driver Output VOD 1.5 V RL = 54Ω (RS-485), Figure 4 2
Change in Magnitude of Driver Differential Output Voltage △VOD 0.2 V R = 54Ω or 100Ω, Figure 4 2
Driver Common-Mode Output Voltage VOC 3 V R = 54Ω or 100Ω, Figure 4 2
Change in Magnitude of Driver Common-Mode Output Voltage △VOC 0.2 V R = 54Ω or 100Ω, Figure 4 2
Input High Voltage VIH 2 V DE, DI, RE 2
Input Low Voltage VIL 0.8 V DE, DI, RE 2
Input Current IIN1 -2 2 µA DE, DI, RE; VCC floating 2
Input Current (A, B) IIN2 1 mA DE = 0V; VCC = 0V or 3.6V; VIN = 12V 2
Input Current (A, B) IIN2 -0.8 mA DE = 0V; VCC = 0V or 3.6V; VIN = -7V 2
Output Leakage (Y, Z) IO 100 µA DE = 0V, RE = 0V, VCC = 0V or 3.6V; VOUT = 12V 2
Output Leakage (Y, Z) IO -100 µA DE = 0V, RE = 0V, VCC = 0V or 3.6V; VOUT = -7V 2
Output Leakage (Y, Z) in Shutdown Mode IO 100 µA DE = 0V, RE = 3.6V, VCC = 0V or 3.6V; VOUT = 12V 2
Output Leakage (Y, Z) in Shutdown Mode IO -100 µA DE = 0V, RE = 3.6V, VCC = 0V or 3.6V; VOUT = -7V 2
Receiver Differential Threshold Voltage VTH -0.2 0.2 V -7V ≤ VCM ≤ 12V 2
Receiver Input Resistance RIN 96 kΩ -7V ≤ VCM ≤ 12V 3
Receiver Output Low Voltage VOL 0.4 V IO = 4mA, VID = -200mV, Figure 6 3
Three-State (high impedance) Output Current at Receiver IOZR -1 1 µA VCC = 3.6V, 0V ≤ VOUT ≤ VCC 3
Supply Current ICC 0.5 1 mA No load, DI = 0 or VCC; DE = VCC, RE = 0 or VCC 3
Supply Current ICC 0.45 0.9 mA DE = 0V, RE = 0 3
Supply Current in Shutdown Mode ISHDN 1.3 2 µA DE = 0, RE = VCC, DI = VCC or 0 3
Driver Short-Circuit Current IOSD -250 mA VOUT = -7V 3
Driver Short-Circuit Current IOSD 250 mA VOUT = 12V 3
Receiver Short-Circuit Output Current IOSR -8 60 mA 0V ≤ VO ≤ VCC 3
ESD Protection for Y, Z, A, B, IEC 1000-4-2 Air Discharge -15 15 KV IEC 1000-4-2 Air Discharge 3
ESD Protection for Y, Z, A, B, IEC 1000-4-2 Contact Discharge (GM3491E) -8 8 KV IEC 1000-4-2 Contact Discharge (GM3491E) 3
ESD Protection for Y, Z, A, B, Human Body Model -15 15 KV Human Body Model 3
Maximum Data Rate 12 15 Mbps 4
Driver Differential Output Delay tDD 1 22 35 ns RL = 60Ω, Figure 7 4
Driver Differential Output Transition Time tDD 3 11 25 ns RL = 60Ω, Figure 7 4
Driver Propagation Delay, Low-to-High Level tPLH 7 23 35 ns RL = 27Ω, Figure 8 4
Driver Propagation Delay, High-to-Low Level tPHL 7 23 35 ns RL = 27Ω, Figure 8 4
Driver Propagation Delay Skew /tPLH - tPHL/ tPDS -8 -1.4 8 ns RL = 27Ω, Figure 8 4
Driver-Output Enable Time to Low Level tPZL 42 90 ns RL = 110Ω, Figure 10 4
Driver-Output Enable Time to High Level tPZH 42 90 ns RL = 110Ω, Figure 9 4
Driver-Output Disable Time from High Level tPHZ 35 80 ns RL = 110Ω, Figure 9 4
Driver-Output Disable Time from Low Level tPLZ 35 80 ns RL = 110Ω, Figure 10 4
Driver-Output Enable Time from Shutdown to Low Level tPSL 650 900 ns RL = 110Ω, Figure 10 4
Driver-Output Enable Time from Shutdown to High Level tPSH 650 900 ns RL = 110Ω, Figure 9 4
Absolute Maximum VCC Supply Voltage VCC 7 V 2
Control Input Voltage RE, DE -0.3 7 V 2
Driver Input Voltage DI -0.3 7 V 2
Driver Output Voltage A, B, Y, Z -7.5 12.5 V 2
Receiver Input Voltage A, B -7.5 12.5 V 2
Storage Temperature Range -65 150 °C 2
Positive Supply (pin VCC) operating range VCC 3 5.5 V Pin description for VCC (pin 14); do not operate with VCC > 5.5V 6
Operation Temperature Range -40 85 °C Order information, GM3491ESA (SOP14) 19

CAD (KiCad official)

  • Symbol: GM3491E
  • Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
  • 3D model: SOP-14 (KiCad packages3D, STEP)
  • 3D model files: gm3491e-etched.step / gm3491e-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); gm3491e.step / gm3491e.glb are the bare package body.

Provenance

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

  • Datasheet: GATEMODE datasheet (20 pp, sha256 0435f1febf984452, 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