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ADM1490EBRMZ
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Analog Devices RS-485/RS-422 ICs, MSOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownADM1490EBRMZ
Analog Devices · RS-485/RS-422 ICs · MSOP-8
ADM1490EBRMZ from Analog Devices, in a MSOP-8. 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 | VCC | power_in | Power supply input, specified at 5 V ± 5% per Table 5. |
| 2 | RO | output | Receiver output. |
| 3 | DI | input | When the driver is enabled, a logic low on DI forces A low and B high, and a logic high forces A high and B low. |
| 4 | GND | power_in | Ground reference for the device. |
| 5 | Y | output | Noninverting driver output Y. |
| 6 | Z | output | Inverting driver output Z. |
| 7 | B | input | Inverting receiver input B, with the RS-485 bus common-mode range of −7 V to +12 V stated in the specifications. |
| 8 | A | input | Noninverting receiver input A, with the RS-485 bus common-mode range of −7 V to +12 V stated in the specifications. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-8 |
| Category | Communication Interface Chip/UART/485/232 |
| Pins | 8 |
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 current, outputs enabled | ICC1 | 1.2 | 2 | mA | Outputs unloaded, digital inputs = VCC or GND | 3 | |
| Supply current, outputs disabled | ICC2 | 0.8 | 1.5 | mA | Outputs unloaded, digital inputs = VCC or GND | 3 | |
| Differential output voltage, loaded (RS-422) | /VOD2/ | 2 | 5 | V | RL = 100 Ω (RS-422), see Figure 21 | 3 | |
| Differential output voltage, loaded (RS-485) | /VOD2/ | 1.5 | 5 | V | RL = 54 Ω (RS-485), see Figure 21 | 3 | |
| Differential output voltage, bus common-mode range | /VOD3/ | 1.5 | 5 | V | −7 V ≤ VTEST ≤ +12 V, see Figure 22 | 3 | |
| Change in /VOD/ for complementary output states | ∆/VOD2/ | 0.2 | V | RL = 54 Ω or 100 Ω, see Figure 21 | 3 | ||
| Common-mode output voltage | VOC | 3 | V | RL = 54 Ω or 100 Ω, see Figure 21 | 3 | ||
| Change in common-mode output voltage for complementary output states | ∆/VOC/ | 0.2 | V | RL = 54 Ω or 100 Ω, see Figure 21 | 3 | ||
| Output leakage current (Y, Z), VIN = 12 V | IO | 100 | µA | DE = 0 V, VDD = 0 V or 5 V, VIN = 12 V | 3 | ||
| Output leakage current (Y, Z), VIN = −7 V | IO | -100 | µA | DE = 0 V, VDD = 0 V or 5 V, VIN = −7 V | 3 | ||
| Output short-circuit current | IOS | 250 | mA | −7 V < VOUT < +12 V | 3 | ||
| Input low voltage (DE, RE, DI) | VIL | 0.8 | V | DE, RE, DI | 3 | ||
| Input high voltage (DE, RE, DI) | VIH | 2 | V | DE, RE, DI | 3 | ||
| Input current (DE, RE, DI) | II | -1 | 1 | µA | DE, RE, DI | 3 | |
| Differential input threshold voltage | VTH | -0.2 | 0.2 | V | −7 V < VCM < +12 V | 3 | |
| Input voltage hysteresis | VHYS | 30 | mV | VCM = 0 V | 3 | ||
| Input current (A, B), VCM = 12 V | II | 1 | mA | VCM = 12 V | 3 | ||
| Input current (A, B), VCM = −7 V | II | -0.8 | mA | VCM = −7 V | 3 | ||
| Line input resistance | RIN | 12 | 30 | kΩ | −7 V ≤ VCM ≤ +12 V | 3 | |
| Output voltage low | VOL | 0.4 | V | IOUT = +4.0 mA, VA − VB = −0.2 V | 3 | ||
| Output voltage high | VOH | 4 | V | IOUT = −4.0 mA, VA − VB = +0.2 V | 3 | ||
| Short-circuit current (receiver output) | 85 | mA | 3 | ||||
| Three-state output leakage current | IOZR | -1 | 1 | µA | VCC = 5.25 V, 0.4 V < VOUT < 2.4 V | 3 | |
| Maximum data rate | 16 | Mbps | 4 | ||||
| Driver propagation delay | tDPLH, tDPHL | 11 | 17 | ns | RL = 54 Ω, CL = 100 pF, see Figure 23 and Figure 3 | 4 | |
| Driver output skew | tSKEW | 0.5 | 2 | ns | RL = 54 Ω, CL = 100 pF, see Figure 23 and Figure 3, tSKEW = /tDPLH − tDPHL/ | 4 | |
| Driver rise time/fall time | tDR, tDF | 8 | 15 | ns | RL = 54 Ω, CL = 100 pF, see Figure 23 and Figure 3 | 4 | |
| Driver enable time | tZH, tZL | 20 | ns | RL = 110 Ω, CL = 50 pF, see Figure 24 and Figure 5 | 4 | ||
| Driver disable time | tHZ, tLZ | 20 | ns | RL = 110 Ω, CL = 50 pF, see Figure 24 and Figure 5 | 4 | ||
| Receiver propagation delay | tPLH, tPHL | 12 | 20 | ns | CL = 15 pF, see Figure 25 and Figure 4 | 4 | |
| Receiver skew | tSKEW | 0.4 | 2 | ns | CL = 15 pF, see Figure 25 and Figure 4 | 4 | |
| Receiver enable time | tZH, tZL | 13 | ns | RL = 1 kΩ, CL = 15 pF, see Figure 26 and Figure 6 | 4 | ||
| Receiver disable time | tHZ, tLZ | 13 | ns | RL = 1 kΩ, CL = 15 pF, see Figure 26 and Figure 6 | 4 | ||
| Supply voltage VCC (recommended operation) | VCC | 4.75 | 5.25 | V | Entire recommended operation range | 3 | |
| Operating temperature range | TA | -40 | 85 | °C | 5 | ||
| VCC to GND | VCC | -0.3 | 7 | V | Referenced to GND | 5 | |
| Digital I/O voltage (DE, RE) | -0.3 | V | Maximum is VCC + 0.3 V as printed | 5 | |||
| Driver input voltage (DI) | -0.3 | V | Maximum is VCC + 0.3 V as printed | 5 | |||
| Receiver output voltage (RO) | -0.3 | V | Maximum is VCC + 0.3 V as printed | 5 | |||
| Driver output/receiver input voltage (A, B, Y, Z) | -9 | 14 | V | 5 | |||
| Operating temperature range (absolute maximum) | TA | -40 | 85 | °C | 5 | ||
| Storage temperature range | TSTG | -55 | 150 | °C | 5 | ||
| ESD (HBM) on A, B, Y, and Z | -8 | 8 | kV | Human body model | 5 | ||
| Thermal resistance, junction-to-ambient, 8-lead MSOP | θJA | 133 | °C/W | Device soldered in a circuit board, worst-case, surface-mount package | 5 |
CAD (KiCad official)
- Symbol:
ADM1490EBRMZ - Footprint:
Package_SO:MSOP-8_3x3mm_P0.65mm - 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files:
adm1490ebrmz-etched.step/adm1490ebrmz-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);adm1490ebrmz.step/adm1490ebrmz.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (16 pp, sha256
74a5d8439f987121, retrieved 2026-10-28, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).