Specifications
| Type | Description |
|---|---|
| Part Number | TRS3221 |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | 16-pin SSOP/TSSOP; SSOP body 6.20 mm x 5.30 mm, TSSOP body 5.00 mm x 4.40 mm |
| Component Type | Other |
| Supply voltage operating range | 3 to 5.5 V; VCC supply operation |
| Maximum data signaling rate | 250 kbps; normal operation |
| Driver output slew rate | 30 V/us max; driver output |
| Number of drivers | 1; device architecture |
| Number of receivers | 1; device architecture, receiver has dedicated enable pin |
| RS-232 bus-pin ESD protection | +/-15 kV; human-body model, bus pins |
| External capacitor requirement | 4 x 0.1 uF; external charge-pump capacitors |
| Standby supply current | 1 uA typ; automatic power-down active |
| VCC absolute maximum | -0.3 to 6 V; VCC to GND |
| V+ absolute maximum | -0.3 to 7 V; V+ to GND |
| V- absolute maximum | 0.3 to -7 V; V- to GND |
| V+ plus absolute V- maximum | 13 V max; V+ + |V-| |
| Logic input absolute maximum | -0.3 to 6 V; DIN, EN, FORCEOFF, FORCEON to GND |
| Receiver input absolute maximum | +/-25 V; RIN to GND |
| Driver output absolute maximum | +/-13.2 V; DOUT to GND |
| Receiver output absolute maximum | -0.3 to VCC + 0.3 V; ROUT to GND |
| Junction temperature absolute maximum | 150 degC; TJ |
| Storage temperature range | -65 to 150 degC; Tstg |
| HBM ESD rating, non-RS232 pins | +/-3000 V; all pins except pin 8 and pin 13, ANSI/ESDA/JEDEC JS-001 |
| HBM ESD rating, RS-232 ports | +/-15000 V; pin 8 and pin 13, ANSI/ESDA/JEDEC JS-001 |
| CDM ESD rating | +/-1500 V; all pins, JEDEC JESD22-C101 |
| Recommended supply voltage, 3.3 V mode | 3 min, 3.3 nom, 3.6 max V; VCC = 3.3 V |
| Recommended supply voltage, 5 V mode | 4.5 min, 5 nom, 5.5 max V; VCC = 5 V |
| Driver high-level input voltage | 2 V min; DIN, FORCEOFF, FORCEON, EN; VCC = 3.3 V |
| Driver high-level input voltage | 2.4 V min; DIN, FORCEOFF, FORCEON, EN; VCC = 5 V |
| Driver low-level input voltage | 0.8 V max; DIN, FORCEOFF, FORCEON, EN |
| Driver input voltage range | 0 to 5.5 V; DIN, FORCEOFF, FORCEON, EN |
| Receiver input voltage range | -25 to 25 V; recommended operating condition |
| Operating free-air temperature | 0 to 70 degC; TRS3221C |
| Operating free-air temperature | -40 to 85 degC; TRS3221I |
| Junction-to-ambient thermal resistance | 98.0 degC/W; DB SSOP, 16 pins |
| Junction-to-ambient thermal resistance | 106.4 degC/W; PW TSSOP, 16 pins |
| Input leakage current | +/-0.01 typ, +/-1 max uA; FORCEOFF, FORCEON, EN |
| Supply current, automatic power-down disabled | 0.3 typ, 1 max mA; no load, FORCEOFF and FORCEON at VCC |
| Supply current, powered off | 1 typ, 10 max uA; no load, FORCEOFF at GND, VCC = 3.3 V to 5 V |
| Supply current, auto-powerdown enabled | 1 typ, 10 max uA; no load, FORCEOFF at VCC, FORCEON at GND, all RIN open or grounded |
| Driver high-level output voltage | 5 min, 5.4 typ V; DOUT with RL = 3 kohm to GND, DIN = GND |
| Driver low-level output voltage | -5 min, -5.4 typ V; DOUT with RL = 3 kohm to GND, DIN = VCC |
| Driver input high current | +/-0.01 typ, +/-1 max uA; VI = VCC |
| Driver input low current | +/-0.01 typ, +/-1 max uA; VI at GND |
| Driver short-circuit output current | +/-35 typ, +/-60 max mA; VCC = 3.6 V, VO = 0 V |
| Driver short-circuit output current | +/-35 typ, +/-60 max mA; VCC = 5.5 V, VO = 0 V |
| Driver output resistance | 300 min, 10M typ ohm; VCC, V+, and V- = 0 V; VO = +/-2 V |
| Driver output leakage current | +/-25 uA max; VO = +/-12 V, VCC = 3 V to 3.6 V, FORCEOFF = GND |
| Driver output leakage current | +/-25 uA max; VO = +/-12 V, VCC = 4.5 V to 5.5 V, FORCEOFF = GND |
| Receiver high-level output voltage | VCC - 0.6 min, VCC - 0.1 typ V; IOH = -1 mA |
| Receiver low-level output voltage | 0.4 V max; IOL = 1.6 mA |
| Receiver positive-going input threshold | 1.5 min, 2.4 max V; VCC = 3.3 V |
| Receiver positive-going input threshold | 1.8 min, 2.4 max V; VCC = 5 V |
| Receiver negative-going input threshold | 0.6 min, 1.1 max V; VCC = 3.3 V |
| Receiver negative-going input threshold | 0.8 min, 1.4 max V; VCC = 5 V |
| Receiver input hysteresis | 0.5 typ V; Vhys = VIT+ - VIT- |
| Receiver output leakage current | +/-0.05 typ, +/-10 max uA; FORCEOFF = 0 V |
| Receiver input resistance | 3 min, 5 typ, 7 max kohm; VI = +/-3 V to +/-25 V |
| INVALID valid high threshold positive | 2.7 V; FORCEON = GND, FORCEOFF = VCC |
| INVALID valid high threshold negative | -2.7 V; FORCEON = GND, FORCEOFF = VCC |
| INVALID low threshold | -0.3 to 0.3 V; FORCEON = GND, FORCEOFF = VCC |
| INVALID high-level output voltage | VCC - 0.6 V min; IOH = -1 mA, FORCEON = GND, FORCEOFF = VCC |
| INVALID low-level output voltage | 0.4 V max; IOH = -1 mA, FORCEON = GND, FORCEOFF = VCC |
| Driver maximum data rate | 150 min, 250 typ kbps; CL = 1000 pF, RL = 3 kohm |
| Driver pulse skew | 100 ns max; CL = 150 to 2500 pF, RL = 3 kohm to 7 kohm |
| Driver slew rate | 6 min, 30 max V/us; VCC = 3.3 V, CL = 150 to 1000 pF, RL = 3 kohm to 7 kohm |
| Driver slew rate | 4 min, 30 max V/us; CL = 150 to 2500 pF, RL = 3 kohm to 7 kohm |
| Receiver propagation delay low-to-high | 150 ns typ; CL = 150 pF |
| Receiver propagation delay high-to-low | 150 ns typ; CL = 150 pF |
| Receiver output enable time | 200 ns typ; CL = 150 pF, RL = 3 kohm |
| Receiver output disable time | 200 ns typ; CL = 150 pF, RL = 3 kohm |
| Receiver pulse skew | 50 ns typ; see Figure 5 |
| Status propagation delay low-to-high | 1 us typ; INVALID status output |
| Datasheet Status | request_only |
Product Overview
TRS3221 is a Texas Instruments RS-232 line driver receiver in the Signal_Chain category. Its architecture includes one driver and one receiver, and the receiver includes a dedicated enable pin. The device operates from a 3 to 5.5 V VCC supply, with recommended 3.3 V-mode operation from 3 to 3.6 V and 5 V-mode operation from 4.5 to 5.5 V.
The RS-232 interface supports normal-operation signaling up to 250 kbps, with a driver maximum data rate specified at 150 kbps minimum and 250 kbps typical under CL = 1000 pF and RL = 3 kohm. Driver output slew rate is specified up to 30 V/us, with operating conditions covering 150 pF to 2500 pF loads and 3 kohm to 7 kohm resistance.
Packaging is 16-pin SSOP/TSSOP, with SSOP body dimensions of 6.20 mm x 5.30 mm and TSSOP body dimensions of 5.00 mm x 4.40 mm. The device requires four 0.1 uF external charge-pump capacitors. It is suited to RS-232 serial interface ports requiring a single driver/receiver channel, automatic power-down behavior, and bus-pin HBM ESD protection rated at +/-15 kV.
Key Features
- 3 to 5.5 V VCC operating range
- One RS-232 driver and one receiver
- Receiver includes a dedicated enable pin
- 250 kbps maximum normal-operation signaling rate
- 30 V/us maximum driver output slew rate
- Four 0.1 uF external charge-pump capacitors
- 1 uA typical standby current in automatic power-down
- +/-15 kV HBM protection on RS-232 bus pins
- Receiver input range from -25 to 25 V
- 16-pin SSOP and TSSOP package options
Typical Applications
- RS-232 serial interface ports
- Single-channel driver receiver links
- 3.3 V RS-232 interfaces
- 5 V RS-232 interfaces
- Automatic power-down serial connections
- Enabled receiver serial outputs
- ESD-protected RS-232 bus pins
Procurement Notes
When requesting a quote for TRS3221, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What supply range does the TRS3221 support?
The TRS3221 operates from a 3 to 5.5 V VCC supply. Recommended operation is specified for 3.3 V mode from 3 to 3.6 V and for 5 V mode from 4.5 to 5.5 V.
How many RS-232 channels are included in TRS3221?
The device architecture includes one RS-232 driver and one receiver. The extracted datasheet facts also specify that the receiver has a dedicated enable pin for receiver-output control.
What data rate and slew rate are specified?
Normal-operation data signaling is specified up to 250 kbps. Under CL = 1000 pF and RL = 3 kohm, the driver maximum data rate is 150 kbps minimum and 250 kbps typical. Driver slew rate is specified up to 30 V/us.
What external capacitors does TRS3221 require?
The extracted datasheet facts specify an external charge-pump capacitor requirement of four 0.1 uF capacitors. No other external capacitor values are included in the provided ground-truth data.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.