MAX202IDR from Texas Instruments, in a SOIC-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	C1+	passive	Positive lead of the C1 charge-pump flying capacitor. Connect one terminal of a 0.1µF ceramic capacitor between C1+ and C1-.
2	V+	power_out	Positive charge-pump output, nominally +10V. Connect a 0.1µF storage capacitor from V+ to GND. Absolute maximum 14V referenced to GND.
3	C1-	passive	Negative lead of the C1 charge-pump flying capacitor. Pair with C1+ (pin 1) via a 0.1µF ceramic capacitor.
4	C2+	passive	Positive lead of the C2 charge-pump flying capacitor. Connect a 0.1µF ceramic capacitor between C2+ and C2-.
5	C2-	passive	Negative lead of the C2 charge-pump flying capacitor. Pair with C2+ (pin 4) via a 0.1µF ceramic capacitor.
6	V-	power_out	Negative charge-pump output, nominally -10V. Connect a 0.1µF storage capacitor from V- to GND. Absolute maximum -14V referenced to GND.
7	DOUT2	output	RS-232 line data output for driver channel 2, drives a remote RS-232 receiver. Swings between V+ and V- levels (typ ±9V into 3kΩ). ±15kV HBM ESD protected.
8	RIN2	input	RS-232 line data input for receiver channel 2, from a remote RS-232 driver. 5kΩ typical input resistance; withstands ±30V input. ±15kV HBM ESD protected. Thresholds ~1.2V (falling) / 1.7V (rising).
9	ROUT2	output	CMOS logic data output for receiver channel 2, connects to the local UART RX. VOH ≥ VCC-0.4V at -1mA; VOL ≤ 0.4V at 1.6mA.
10	DIN2	input	CMOS logic data input for driver channel 2, driven from the local UART TX. VIH ≥ 2V, VIL ≤ 0.8V; input range 0-5.5V.
11	DIN1	input	CMOS logic data input for driver channel 1, driven from the local UART TX. VIH ≥ 2V, VIL ≤ 0.8V; input range 0-5.5V.
12	ROUT1	output	CMOS logic data output for receiver channel 1, connects to the local UART RX. VOH ≥ VCC-0.4V at -1mA; VOL ≤ 0.4V at 1.6mA.
13	RIN1	input	RS-232 line data input for receiver channel 1, from a remote RS-232 driver. 5kΩ typical input resistance; withstands ±30V input. ±15kV HBM ESD protected.
14	DOUT1	output	RS-232 line data output for driver channel 1, drives a remote RS-232 receiver. Swings between V+ and V- levels (typ ±9V into 3kΩ). ±15kV HBM ESD protected.
15	GND	power_in	Device ground reference. All voltages are referenced to this pin.
16	VCC	power_in	Supply voltage. Connect to external 5V supply (4.5V-5.5V recommended). Bypass locally with a 0.1µF ceramic capacitor. ICC typ 8mA (no load).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-16
Category	Comm/UART
Pins	16

Ordering variants

Same part, different packaging or reel option.

MAX202IDR
MAX202IDRIDW
MAX202IDRIDWR
MAX202IDRIPW
MAX202IDRIPWR

CAD (KiCad official)

Symbol: MAX202IDR
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`max202idr.step`	217 KB	You want the bare part, or you mark your own boards.
`max202idr-etched.step`	2.2 MB	You want the part with `MAX202IDR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 571 faces against 267 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Texas Instruments datasheet (27 pp, sha256 77db8a8164634404, retrieved 2026-08-17, tier: manufacturer)
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