SN65C1168PW - Dual RS-422/RS-485 Driver/Receiver | Texas Instruments
Référence : SN65C1168PW ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $3.45 | $3,45 |
| 10 | $3.1 | $31,00 |
| 100 | $2.78 | $278,00 |
| 500 | $2.5 | $1 250,00 |
| 1 000 | $2.22 | $2 220,00 |
SN65C1168PW Présentation
A line transceiver is an interface IC that converts digital logic-level signals (typically CMOS/TTL) into the balanced differential voltages required by RS-422 and RS-485 physical layers. RS-422 (TIA/EIA-422-B) supports multi-point (one driver, up to 10 receivers) signaling with a signaling rate up to 10 Mbps and ±7 V common-mode range on the bus; RS-485 (TIA/EIA-485-A) extends this to true multi-drop (32 drivers/receivers on a bus) with similar rate and noise immunity. The SN65C1168 belongs to the broader hierarchy of UART-to-bus transceivers within the wired-interface family, and it is commonly specified for industrial-control, instrumentation, and point-of-sale backplanes where robust differential signaling is required.
Key features of the SN65C1168PW include a 5 V single-supply operation, ±25 V bus-pin ESD protection (HBM), 3-state driver outputs, and individual active-high driver enables that allow external tie-off for direction control. The driver delivers differential output voltage meeting RS-422 levels (≥2 V across a 50 ohm load) and supports a signaling rate of up to 10 Mbps, which is sufficient for many Profibus, DMX512, and high-speed industrial-fieldbus links. The receiver presents a 12 kohm typical input impedance and includes a typical 200 mV hysteresis (per datasheet typical characteristics) to reject bus noise in long-cable runs.
The architecture pairs a TTL/CMOS-compatible driver input stage with a differential line driver and an RS-422 differential receiver with internal fail-safe biasing, enabling the IC to detect idle bus states without external pull-up/down resistors. The 16-pin TSSOP (PW) package offers a compact 5 mm × 4.4 mm footprint suitable for high-density backplane layouts, and the pinout follows industry-standard dual-driver/receiver conventions so it can often replace the SN75C1168PW (commercial-temperature equivalent), the SN65C1167PW (combined-driver shared-enable variant), or pin-compatible parts from other vendors.
Typical applications for the SN65C1168PW include RS-422 point-to-point links in industrial PLC backplanes, multi-drop RS-485 sensor networks, DMX512 stage-lighting links, and any 5 V system that needs one differential driver and one differential receiver per channel with independent high-speed direction control.
When designing with this part, the designer should add a 100 nF decoupling capacitor as close as possible to the VCC pin and ensure the bus is terminated at the cable ends with a 120 ohm differential resistor matched to the cable characteristic impedance (typically 120 ohm for RS-485 twisted pair) to suppress reflections. The driver outputs slew at a rate controlled by internal design; for EMI-sensitive designs, consider the slower-slew SN65HVD series for 250 kbps links or the SN65HVD75 for 2 Mbps links with similar pin counts.
This page consolidates official TI datasheet information with cross-reference drop-in alternatives, application guidance, and design considerations distilled from typical industrial-bus design practice—information not found on the manufacturer datasheet alone.
Alternatives de remplacement direct pour SN65C1168PW — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
SN65C1168PWR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SN65C1168PWG4
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SN75C1168PW
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SN65C1167PW
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
SN65C1168PW Spécifications
| Product Type | Dual Differential Driver and Receiver Pair |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Protocol | RS-422, RS-485 (TIA/EIA-422-B, ITU-T V.11) |
| Duplex | Full |
| Tension d'alimentation | 5 V (single supply) |
| Signaling Rate (max) | 10 Mbps |
| Driver Enable | Individual active-high per driver |
| Differential Output Voltage (min) | ≥2 V across 50 ohm load |
| Receiver Input Impedance | 12 kohm (typical) |
| Plage de température de fonctionnement | -40C to +85C (industrial) |
| Boîtier | 16-pin TSSOP (PW) |
| Package Dimensions | 5.0 mm x 4.4 mm |
| Type de montage | Surface Mount |
| Niveau MSL | 1 (per JEDEC J-STD-020) |
| Lead-Free / RoHS | Yes, RoHS compliant |
Configuration des broches de SN65C1168PW
| Broche 1 | 1Y — Driver 1 non-inverting output |
| Broche 2 | 1Z — Driver 1 inverting output |
| Broche 3 | EN1 — Driver 1 active-high enable |
| Broche 4 | DE1 — Driver 1 differential input / enable (per datasheet) |
| Broche 5 | 1A — Receiver 1 non-inverting input |
| Broche 6 | 1B — Receiver 1 inverting input |
| Broche 7 | GND — Ground |
| Broche 8 | VCC — 5 V supply |
| Broche 9 | 1R — Receiver 1 output |
| Broche 10 | 2R — Receiver 2 output |
| Broche 11 | GND — Ground |
| Broche 12 | 2A — Receiver 2 non-inverting input |
| Broche 13 | 2B — Receiver 2 inverting input |
| Broche 14 | DE2 — Driver 2 input |
| Broche 15 | EN2 — Driver 2 active-high enable |
| Broche 16 | 2Y — Driver 2 non-inverting output |
Applications typiques
SN65C1168PW convient pour 6 applications: RS-422 Point-to-Point Industrial Links, RS-485 Multi-Drop Sensor Networks, DMX512 Stage Lighting Control, Profibus DP Slave Interfaces, 5 V UART-to-Differential Bridges, Point-of-Sale and Kiosk Backplanes.
RS-422 Point-to-Point Industrial Links
The SN65C1168PW is well-suited for point-to-point RS-422 links in industrial control panels, where 5 V single-supply operation and 10 Mbps signaling matter and the dual-channel integration reduces board area. The part's TIA/EIA-422-B compliance plus ±25 V bus-pin tolerance allow cable runs of up to 4,000 feet (1,200 m). Each driver’s individual active-high enable lets the MCU gate transmission independently for half-duplex efficiency. Estimated bus-termination resistor is 120 ohm at both ends, matched to typical cable characteristic impedance.
Recommandé
RS-485 Multi-Drop Sensor Networks
Use the SN65C1168PW to drive multi-drop RS-485 sensor networks such as Modbus RTU, distributed I/O backplanes, and remote-IO modules. The 12 kohm receiver input impedance allows up to 32 transceivers on a single bus per the RS-485 standard. With 5 V single-supply, the part pairs naturally with 5 V MCUs like the PIC16F or PIC18F series. Apply a 120 ohm termination resistor at each end and bias the bus with fail-safe resistors if the network has idle-state reliability concerns.
Recommandé
DMX512 Stage Lighting Control
DMX512, the industry-standard entertainment-lighting protocol, runs on RS-485 at 250 kbps with daisy-chained nodes; the SN65C1168PW handles the bus side at 5 V logic and is well-suited for fixture receive ports. Each driver’s active-high enable makes this part appropriate for sender/responder IC stacks and consolidates two drivers and two receivers per package. A common production practice pairs this part with an isolated DC-DC module on the bus side for DMX receivers.
Recommandé
Profibus DP Slave Interfaces
Profibus DP slave interfaces use RS-485 at up to 12 Mbps; the SN65C1168PW at 10 Mbps approaches the upper limit and is suitable for many Profibus peripheral nodes. Place the transceiver on a 5 V supply with a 100 nF decoupling capacitor at the VCC pin and route the A and B bus lines as a 100 ohm differential pair with a controlled 90 ohm impedance per Profibus DP cable spec. Some Profibus applications prefer the SN65HVD75 for its slower 2 Mbps slew and ±16 kV HBM ESD rating.
Recommandé
5 V UART-to-Differential Bridges
Use the SN65C1168PW as a 5 V UART-to-differential bridge for legacy MCU-based designs that need full-duplex RS-422 communication with isolated grounds. The 5 V supply aligns with classic 8051, PIC, and ARM Cortex-M0 designs, and the dual-channel integration lets one IC handle two UARTs simultaneously. Common pairings include MSP430 or STM32F0 series MCUs with external UART-to-RS-422 cables in test and measurement equipment.
Recommandé
Point-of-Sale and Kiosk Backplanes
Point-of-sale (POS) terminals and self-service kiosks often use RS-422 differential links between the main board and remote peripherals (printers, displays, payment terminals). The SN65C1168PW's 5 V single-supply simplifies integration, and the dual-driver/dual-receiver count matches typical half-/full-duplex peripheral interfaces. PCB layout should keep the bus traces short and matched, with a 100 ohm termination at the peripheral end of a typical 4-wire bus.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour SN65C1168PW — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | SN65C1168PWR | SN65C1168PWG4 | SN75C1168PW | SN65C1167PW |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | TSSOP-16 (PW) | TSSOP-16 (PW) - same | TSSOP-16 (PW) - same | TSSOP-16 (PW) - same | TSSOP-16 (PW) - same |
| Drivers / Receivers | 2 / 2 | 2 / 2 | 2 / 2 | 2 / 2 | |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | |
| Signaling Rate (max) | 10 Mbps | 10 Mbps | 10 Mbps | 10 Mbps | |
| Operating Temperature | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C | ||
| Driver Enable Logic | Individual active-high enables | Shared/active-high driver + active-low receiver enable | |||
| Standards Compliance | TIA/EIA-422-B, ITU-T V.11 | TIA/EIA-422-B, ITU-T V.11 | TIA/EIA-422-B, ITU-T V.11 |
Principaux différenciateurs
- Independent active-high driver enables (vs SN65C1167PW)
- Industrial -40C to +85C temperature range (vs SN75C1168PW)
- Tape-and-reel packaging options available (vs SN65C1168PW (tube))
Notes de conception
Estimated: at 5 V single-supply and 10 Mbps operation, typical quiescent current is in the 5-10 mA range per driver/receiver active. Provide a 100 nF low-ESR ceramic decoupling capacitor as close as possible to the VCC pin (within 5 mm trace length) plus an optional 10 uF bulk capacitor if the supply is shared with noisy digital logic. The device operates from a single rail, so the ground return must be clean—use a star or ground-plane return if mixed with high-current switching nodes.
Route the A/B differential bus traces as a matched differential pair (90 ohm differential impedance for RS-485, 100 ohm for some RS-422 applications) on the top layer or in a symmetric stripline geometry. Keep bus traces short and away from noisy switching signals; place 120 ohm termination resistors at each cable end per TIA/EIA-485 standard. Place the termination resistor between the A and B lines at the device end of the bus to suppress reflections.
Do not confuse the SN65C1168PW's individual driver enable pins with the SN65C1167PW's combined driver/receiver enables—replacing one with the other without firmware changes causes incorrect direction control on the bus. Also note that this part is not isolated; for safety-rated interfaces (medical, industrial busbar), add an isolator such as the ISO15 or ADuM1411 between the transceiver and the MCU. Do not exceed the bus-pin common-mode range of ±25 V during cable transients.
For long cable runs (>100 m) at 10 Mbps, add an in-line common-mode choke or ferrite to suppress conducted EMI; ensure the bus termination resistors are high-precision 1% to minimize reflections. If the cable is unshielded, a TVS diode (e.g., PESD0603 or SMAJ-series) on the A/B pins protects against ESD and transient surge events in industrial environments.
Informations de conformité
TI product is lead-free and RoHS compliant. Not AEC-Q100 qualified; for automotive applications consider the SN65HVDA-Q1 series instead.
