# DS34C87N

**HGSEMI** · RS-485 / RS-422 ICs · DIP-16

DS34C87N from HGSEMI, in a DIP-16. 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 | INPUT A | input | Driver A TTL/CMOS input, with input range 0 V to VCC and protected by ESD diodes to VCC and ground. |
| 2 | OUTPUTS A (1) | tri_state | First of the two complementary RS-422 differential outputs of driver A, which is TRI-STATE when the A/B control input is low. |
| 3 | OUTPUTS A (2) | tri_state | Second of the two complementary RS-422 differential outputs of driver A, which is TRI-STATE when the A/B control input is low. |
| 4 | A/B CONTROL | input | Output control input shared by drivers A and B; high enables their outputs and low puts them in TRI-STATE (high impedance). |
| 5 | OUTPUTS B (1) | tri_state | First of the two complementary RS-422 differential outputs of driver B, which is TRI-STATE when the A/B control input is low. |
| 6 | OUTPUTS B (2) | tri_state | Second of the two complementary RS-422 differential outputs of driver B, which is TRI-STATE when the A/B control input is low. |
| 7 | INPUT B | input | Driver B TTL/CMOS input, with input range 0 V to VCC and protected by ESD diodes to VCC and ground. |
| 8 | GND | power_in | Ground reference for the device. |
| 9 | INPUT C | input | Driver C TTL/CMOS input, with input range 0 V to VCC and protected by ESD diodes to VCC and ground. |
| 10 | OUTPUTS C (1) | tri_state | First of the two complementary RS-422 differential outputs of driver C, which is TRI-STATE when the C/D control input is low. |
| 11 | OUTPUTS C (2) | tri_state | Second of the two complementary RS-422 differential outputs of driver C, which is TRI-STATE when the C/D control input is low. |
| 12 | C/D CONTROL | input | Output control input shared by drivers C and D; high enables their outputs and low puts them in TRI-STATE (high impedance). |
| 13 | OUTPUTS D (1) | tri_state | First of the two complementary RS-422 differential outputs of driver D, which is TRI-STATE when the C/D control input is low. |
| 14 | OUTPUTS D (2) | tri_state | Second of the two complementary RS-422 differential outputs of driver D, which is TRI-STATE when the C/D control input is low. |
| 15 | INPUT D | input | Driver D TTL/CMOS input, with input range 0 V to VCC and protected by ESD diodes to VCC and ground. |
| 16 | VCC | power_in | Single 5 V supply, operating range 4.50 V to 5.50 V and absolute maximum -0.5 to 7.0 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | DIP-16 |
| Category | Interface |
| Pins | 16 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| High Level Input Voltage | VIH | 2 |  |  | V |  | 3 |
| Low Level Input Voltage | VIL |  |  | 0.8 | V |  | 3 |
| High Level Output Voltage | VOH | 2.5 |  |  | V | VIN = VIH OR VIL, LOUT=-20 MA | 3 |
| Low Level Output Voltage | VOL |  |  | 0.5 | V | VIN = VI OR VL, IOUT=48 MA | 3 |
| Differential Output Voltage | VT | 2 |  |  | V | RL=100Ω (NOTE 5) | 3 |
| Difference In Differential Output Voltage | /VT/-/VT/ |  |  | 0.4 | V | RL=100Ω (NOTE 5) | 3 |
| Common Mode Output Voltage | VOS |  |  | 3 | V | RL=100Ω (NOTE 5) | 3 |
| Difference In Common Mode Output Voltage | /VOS/-/VOS/ |  |  | 0.4 | V | RL=100Ω (NOTE 5) | 3 |
| Input Current | IIN | -10 |  | 10 | µA | VIN =VCC，GND,VIH, OR VIL | 3 |
| Quiescent Supply Current | ICC |  |  | 200 | µA | IOUT =0µA, VIN = VCC OR GND | 3 |
| Quiescent Supply Current | ICC |  |  | 0.8 | mA | VIN =2.4V OR 0.5V (NOTE 6) | 3 |
| Tri-State Output Leakage Current | IOZ | -0.5 |  | 0.5 | µA | VOUT = VCC OR GND, CONTROL=VIL | 3 |
| Output Short Circuit Current | ISC | -30 |  | -150 | mA | VIN = VCC OR GND (NOTE 7) | 3 |
| Output Leakage Current Power Off | IDFF |  |  | 100 | µA | VCC=0V, VOUT =6V | 3 |
| Output Leakage Current Power Off | IDFF | -100 |  |  | µA | VCC=0V, VOUT=-0.25V | 3 |
| Supply Voltage | VCC | 4.5 |  | 5.5 | V |  | 2 |
| DC Input or Output Voltage | Vin, Vout | 0 |  |  | V | MAX printed as VCC | 2 |
| Operating Temperature Range | tA | -40 |  | 85 | ℃ |  | 2 |
| Input Rise Or Fall Times | tr, tf |  |  | 500 | ns |  | 2 |
| Supply Voltage | VCC | -0.5 |  | 7 | V | Notes 1 & 2 | 2 |
| DC Voltage | VIN | -1.5 |  |  | V | MAX printed as VCC+1.5 | 2 |
| DC Output Voltage | VOUT | -0.5 |  | 7 | V | Notes 1 & 2 | 2 |
| Clamp Diode Current | LIK, LOK | -20 |  | 20 | mA |  | 2 |
| DC Output Current, Per Pin | LOUT | -150 |  | 150 | mA |  | 2 |
| DC VCC or GND Current | LCC | -150 |  | 150 | mA |  | 2 |
| Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 2 |
| Power Dissipation | PO |  |  | 500 | mW | Note 3 | 2 |
| Lead Temperature (soldering 10 sec) | TL |  |  | 260 | ℃ | Soldering 10 sec | 2 |

## CAD (KiCad official)

- Symbol: `DS34C87N`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files: `ds34c87n-etched.step` / `ds34c87n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ds34c87n.step` / `ds34c87n.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758163152771133440) (9 pp, sha256 `73e6b9efa5aa1bd7`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ds34c87n-datasheet.pdf)