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DS2408S+T&R

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Analog Devices Inc Maxim Integrated I/O Expanders, SO-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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DS2408S+T&R

Analog Devices Inc Maxim Integrated · I/O Expanders · SO-16

DS2408S+T&R from Analog Devices Inc Maxim Integrated, in a SO-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 N.C. unconnected Not connected.
2 P0 bidirectional I/O pin of channel 0, a logic input and open-drain output with 100Ω maximum on-resistance and a 0V to 5.25V operating range; power-on default is indeterminate.
3 VCC power_in Optional power supply input with a range of 2.8V to 5.25V that must be tied to GND if not used.
4 I/O bidirectional 1-Wire interface, open-drain, requiring an external pullup resistor.
5 GND power_in Ground reference for the device.
6 N.C. unconnected Not connected.
7 P7 bidirectional I/O pin of channel 7 with the same characteristics as P0 (logic input and open-drain output, 100Ω maximum on-resistance, 0V to 5.25V range).
8 P6 bidirectional I/O pin of channel 6 with the same characteristics as P0 (logic input and open-drain output, 100Ω maximum on-resistance, 0V to 5.25V range).
9 P5 bidirectional I/O pin of channel 5 with the same characteristics as P0 (logic input and open-drain output, 100Ω maximum on-resistance, 0V to 5.25V range).
10 RSTZ bidirectional Software-configurable PIO reset input (RST), where a LOW input sets all PIO outputs off, or open-drain strobe output (STRB) that pulses after a PIO write or read; power-on default function is RST.
11 P4 bidirectional I/O pin of channel 4 with the same characteristics as P0 (logic input and open-drain output, 100Ω maximum on-resistance, 0V to 5.25V range).
12 P3 bidirectional I/O pin of channel 3 with the same characteristics as P0 (logic input and open-drain output, 100Ω maximum on-resistance, 0V to 5.25V range).
13 P2 bidirectional I/O pin of channel 2 with the same characteristics as P0 (logic input and open-drain output, 100Ω maximum on-resistance, 0V to 5.25V range).
14 P1 bidirectional I/O pin of channel 1 with the same characteristics as P0 (logic input and open-drain output, 100Ω maximum on-resistance, 0V to 5.25V range).
15 N.C. unconnected Not connected.
16 N.C. unconnected Not connected.

Key specifications

Parameter Value
Manufacturer Analog Devices Inc Maxim Integrated
Package SO-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
1-Wire Pullup Voltage VPUP 2.8 5.25 V Standard speed 2
1-Wire Pullup Voltage VPUP 3.3 5.25 V Overdrive speed 2
Standby Supply Current ICCS 1 µA VCC at VPUP, I/O pin at 0.3V 2
1-Wire Pullup Resistance RPUP 2.2 kΩ Notes 1, 2 2
Input Capacitance CIO 1200 pF Notes 3, 4 2
Input Load Current IL 1 µA I/O pin at VPUP, VCC at 0V 2
High-to-Low Switching Threshold VTL 0.5 3.2 V Notes 4, 5, 6 2
Input-Low Voltage (1-Wire) VIL 0.3 V Notes 1, 7 2
Low-to-High Switching Threshold VTH 0.8 3.4 V Notes 4, 5, 8 2
Switching Hysteresis VHY 0.16 0.73 V Notes 9, 4 2
Output-Low Voltage (1-Wire) VOL 0.4 V at 4mA (Note 10) 2
Recovery Time tREC 5 µs Standard speed, RPUP = 2.2kΩ (Note 1) 2
Recovery Time tREC 2 µs Overdrive speed, RPUP = 2.2kΩ (Note 1) 2
Rising-Edge Hold-off Time tREH 0.5 5 µs Standard speed; Notes 11, 4 2
Rising-Edge Hold-off Time tREH 0.5 2 µs Overdrive speed; Notes 11, 4 2
Timeslot Duration tSLOT 65 µs Standard speed; Notes 1, 12 2
Timeslot Duration tSLOT 10 µs Overdrive speed; Notes 1, 12 2
Reset-Low Time tRSTL 480 720 µs Standard speed, VPUP > 4.5V (Notes 1, 12) 3
Reset-Low Time tRSTL 660 720 µs Standard speed (Notes 1, 12) 3
Reset-Low Time tRSTL 53 80 µs Overdrive speed (Notes 1, 12) 3
Presence-Detect High Time tPDH 15 60 µs Standard speed (Note 12) 3
Presence-Detect High Time tPDH 2 7 µs Overdrive speed (Note 12) 3
Presence-Detect Fall Time tFPD 1 5 µs Standard speed, VPUP > 4.5V (Note 13) 3
Presence-Detect Fall Time tFPD 1 8 µs Standard speed (Note 13) 3
Presence-Detect Fall Time tFPD 1 µs Overdrive speed (Note 13) 3
Presence-Detect Low Time tPDL 60 240 µs Standard speed, VPUP > 4.5V (Note 12) 3
Presence-Detect Low Time tPDL 60 280 µs Standard speed (Note 12) 3
Presence-Detect Low Time tPDL 7 27 µs Overdrive speed (Note 12) 3
Presence-Detect Sample Time tMSP 65 75 µs Standard speed, VPUP > 4.5V (Note 1) 3
Presence-Detect Sample Time tMSP 68 75 µs Standard speed (Note 1) 3
Presence-Detect Sample Time tMSP 8 9 µs Overdrive speed (Note 1) 3
Write-0 Low Time tW0L 60 120 µs Standard speed (Notes 1, 12, 14) 3
Write-0 Low Time tW0L 8 13 µs Overdrive speed (Notes 1, 12, 14) 3
Write-1 Low Time tW1L 5 15 µs Standard speed (Notes 1, 12, 14) 3
Write-1 Low Time tW1L 1 1.8 µs Overdrive speed (Notes 1, 12, 14) 3
Write Sample Time (Slave Sampling) tSLS 15 60 µs Standard speed (Note 12) 3
Write Sample Time (Slave Sampling) tSLS 1.8 8 µs Overdrive speed (Note 12) 3
Read-Low Time tRL 5 µs Standard speed (Notes 1, 15); printed max is '15 - δ' 3
Read-Low Time tRL 1 µs Overdrive speed (Notes 1, 15); printed max is '1.8 - δ' 3
Read-0 Low Time (Data From Slave) tSPD 15 60 µs Standard speed (Note 12) 3
Read-0 Low Time (Data From Slave) tSPD 1.8 8 µs Overdrive speed (Note 12) 3
Read-Sample Time tMSR 15 µs Standard speed (Notes 1, 12, 15); printed min is 'tRL + δ' 3
Read-Sample Time tMSR 1.8 µs Overdrive speed (Notes 1, 12, 15); printed min is 'tRL + δ' 3
Input-Low Voltage (P0 to P7, RSTZ) VIL 0.3 V Notes 1, 7 3
Input-High Voltage (P0 to P7, RSTZ) VIH 5.25 V VX = max (VPUP,VCC) (Note 1); printed min is 'VX - 0.8' 3
Output-Low Voltage (P0 to P7, RSTZ) VOL 0.4 V at 4mA (Note 10) 3
Leakage Current (P0 to P7, RSTZ) ILP 1 µA 5.25V at the pin 3
Output Fall Time (PIO, RSTZ) tFPIO 100 ns Notes 4, 16 3
Minimum-Sensed PIO Pulse tPWMIN 1 5 µs Notes 4, 17 3
I/O Voltage to GND (P0 to P7, RSTZ) -0.5 6 V 2
P0 to P7, RSTZ, I/O combined sink current 20 mA 2
Operating Temperature Range -40 85 °C 2
Junction Temperature 150 °C 2
Storage Temperature Range -55 125 °C 2
Lead temperature (soldering 10s) 300 °C soldering 10s 2
Soldering Temperature (reflow) 260 °C 2
Optional Power Supply Input (VCC) range VCC 2.8 5.25 V Must be tied to GND if not used 5
P0 to P7 I/O operating range 0 5.25 V Logic input/open-drain output 5

CAD (KiCad official)

  • Symbol: DS2408S+T&R
  • Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
  • 3D model: SO-16 (KiCad packages3D, STEP)
  • 3D model files: ds2408s-t-r-etched.step / ds2408s-t-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ds2408s-t-r.step / ds2408s-t-r.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices Inc Maxim Integrated datasheet (39 pp, sha256 a3ff6f43ff6573a3, retrieved 2026-10-21, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF