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ICM7556ISD+T

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Analog Devices Inc Maxim Integrated Timers / Counters, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Datasheet

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Contents

README

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ICM7556ISD+T

Analog Devices Inc Maxim Integrated · Timers / Counters · SOIC-14

ICM7556ISD+T from Analog Devices Inc Maxim Integrated, in a SOIC-14. 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 DISCHARGE_A passive Section A discharge output that discharges the external timing capacitor when the output is low.
2 THRESHOLD_A input Section A threshold comparator input that resets the timer when above 2/3 of V+ (0.66 V+ typ at V+ = 5V).
3 CONTROL VOLTAGE_A input Section A control voltage input that sets the THRESHOLD and TRIGGER trip voltages and needs no decoupling capacitor.
4 RESET_A input Section A active-low reset input with trip voltage of about 0.7V that dominates all other inputs.
5 OUTPUT_A output Section A CMOS output that drives CMOS and TTL loads, sinking 3.2mA at 0.4V max low.
6 TRIGGER_A input Section A trigger input that sets the output high when below 1/3 of V+ (0.33 V+ typ at V+ = 5V).
7 GND power_in Ground, common to both timer sections.
8 TRIGGER_B input Section B trigger input that sets the output high when below 1/3 of V+ (0.33 V+ typ at V+ = 5V).
9 OUTPUT_B output Section B CMOS output that drives CMOS and TTL loads, sinking 3.2mA at 0.4V max low.
10 RESET_B input Section B active-low reset input with trip voltage of about 0.7V that dominates all other inputs.
11 CONTROL VOLTAGE_B input Section B control voltage input that sets the THRESHOLD and TRIGGER trip voltages and needs no decoupling capacitor.
12 THRESHOLD_B input Section B threshold comparator input that resets the timer when above 2/3 of V+ (0.66 V+ typ at V+ = 5V).
13 DISCHARGE_B passive Section B discharge output that discharges the external timing capacitor when the output is low.
14 V+ power_in Positive supply, 2V to 18V (absolute maximum +18V).

Key specifications

Parameter Value
Manufacturer Analog Devices Inc Maxim Integrated
Package SOIC-14
Category Clock/Timing
Pins 14

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Supply Voltage V+ 2 16.5 V -20°C ≤ TA ≤ +85° 4
Supply Voltage V+ 3 16 V -55°C ≤ TA ≤ +125° 4
Supply Current ICM7556 I+ 60 500 µA V+ = 2V to 16.5V; TA = +25°C 4
Supply Current ICM7556 I+ 240 µA V+ = 5V; TA = +25°C 4
Supply Current ICM7556 I+ 500 µA V+ = 5V; -20°C ≤ TA ≤ +85°C 4
Supply Current ICM7556 I+ 600 µA V+ = 5V; -55°C ≤ TA ≤ +125°C 4
Initial Accuracy (timing error) 2 5 % Circuit of Figure 1b; RA = RB 100kΩ, C = 0.1µF, V+ = 5V 4
Drift with Temperature 50 ppm/°C V+ = 5V 4
Drift with Temperature 75 ppm/°C V+ = 10V 4
Drift with Temperature 100 ppm/°C V+ = 15V 4
Drift with Supply Voltage 1 3 %V V+ = 5V 4
Threshold Voltage VTH 0.63 0.66 0.67 V+ V+ = 5V 4
Trigger Voltage VTRIG 0.29 0.33 0.34 V+ V+ = 5V 4
Trigger Current ITRIG 50 pA V+ = 16.5V 4
Trigger Current ITRIG 10 pA V+ = 5V 4
Trigger Current ITRIG 1 pA V+ = 2V 4
Threshold Current ITH 50 pA V+ = 16.5V 4
Threshold Current ITH 10 pA V+ = 5V 4
Threshold Current ITH 1 pA V+ = 2V 4
Reset Current IRST 100 pA VREST = Ground; V+ = 16.5V 4
Reset Current IRST 20 pA VREST = Ground; V+ = 5V 4
Reset Current IRST 2 pA VREST = Ground; V+ = 2V 4
Reset Voltage VRST 0.4 0.7 1.2 V V+ = 16.5V 5
Control Voltage VCV 0.62 0.66 0.67 V+ V+ = 5V 5
Output Voltage Drop Output Lo VO 0.1 0.4 V V+ = 16.5V; ISINK = 3.2mA 5
Output Voltage Drop Output Lo VO 0.15 0.4 V V+ = 5V; ISINK = 3.2mA 5
Output Voltage Output Hi VO 15.75 16.25 V V+ = 16.5V; ISOURCE = 2.0mA 5
Output Voltage Output Hi VO 4 4.5 V V+ = 5V; ISOURCE = 2.0mA 5
Discharge Output Voltage VDIS 0.1 0.4 V V+ = 5V, IDIS = 3.2mA 5
Rise Time of Output tr 40 75 ns RL = 10MΩ CL = 10pF V+ = 5V 5
Fall Time of Output tf 40 75 ns RL = 10MΩ CL = 10pF V+ = 5V 5
Guaranteed Max Oscillator Frequency fmax 500 kHz Astable Operation 5
Supply Voltage (absolute maximum) V+ 18 V Supply Voltage 2
Output Current IOUT 100 mA Output Current 2
Power Dissipation ICM7556 PD 300 mW ICM7556; below 125°C (Note 2) 2
Storage Temperature TSTG -65 150 °C Storage Temperature 2
Lead Temperature (soldering, 60s) 300 °C soldering, 60s 2
Operating Temperature Range (ICM7556ISD ordering range) TA -20 85 °C ICM7556ISD (14-pin SO) 1

CAD (KiCad official)

  • Symbol: ICM7556ISD+T
  • Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
  • 3D model: SOIC-14 (KiCad packages3D, STEP)
  • 3D model files: icm7556isd-t-etched.step / icm7556isd-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); icm7556isd-t.step / icm7556isd-t.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices Inc Maxim Integrated datasheet (11 pp, sha256 30fd218015c11427, retrieved 2026-10-20, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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