MC14538BDR2G

@@ -0,0 +1,59 @@+# MC14538BDR2G++**onsemi** · Monostable Multivibrators · SOIC-16++MC14538BDR2G from onsemi, 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 | C_X_A | passive | Timing capacitor connection for monostable A. External timing capacitor Cx connects between this pin (C_X) and R_X/C_X. |+| 2 | R_X/C_X_A | passive | Timing resistor/capacitor common node for monostable A. External timing resistor Rx connects between VDD and this pin; timing capacitor Cx connects between this pin and C_X. |+| 3 | RESET_A | input | Active-low reset input for monostable A. A low level forces Q low and Q-bar high independent of the input trigger state. |+| 4 | A_A | input | Trigger input A of monostable A (leading-edge / negative-transition trigger input). Triggers the one-shot on the falling edge when B is high and Reset is high. |+| 5 | B_A | input | Trigger input B of monostable A (trailing-edge / positive-transition trigger input). Triggers the one-shot on the rising edge when A is low and Reset is high. |+| 6 | Q_A | output | True output of monostable A. Goes high for the programmed pulse width Tx ≈ RxCx after a valid trigger. |+| 7 | Q_A_BAR | output | Complement (inverted) output of monostable A. Goes low for the programmed pulse width after a valid trigger. |+| 8 | VSS | power_in | Negative supply / ground reference (0 V). Supply range VDD-VSS = 3.0 to 18 V. |+| 9 | Q_B_BAR | output | Complement (inverted) output of monostable B. Goes low for the programmed pulse width after a valid trigger. |+| 10 | Q_B | output | True output of monostable B. Goes high for the programmed pulse width Tx ≈ RxCx after a valid trigger. |+| 11 | B_B | input | Trigger input B of monostable B (trailing-edge / positive-transition trigger input). Triggers the one-shot on the rising edge when A is low and Reset is high. |+| 12 | A_B | input | Trigger input A of monostable B (leading-edge / negative-transition trigger input). Triggers the one-shot on the falling edge when B is high and Reset is high. |+| 13 | RESET_B | input | Active-low reset input for monostable B. A low level forces Q low and Q-bar high independent of the input trigger state. |+| 14 | R_X/C_X_B | passive | Timing resistor/capacitor common node for monostable B. External Rx connects between VDD and this pin; external Cx connects between this pin and C_X. |+| 15 | C_X_B | passive | Timing capacitor connection for monostable B. External Cx connects between this pin and R_X/C_X. |+| 16 | VDD | power_in | Positive supply voltage. Operating range 3.0 V to 18 V (VDD referenced to VSS). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | SOIC-16 |+| Category | Logic |+| Pins | 16 |++## Ordering variants++- `MC14538BDR2GDR2G`+- `MC14538BDR2GDG`+- `MC14538BDR2GPG`+- `MC14538BDR2GDTR2G`+- `MC14538BDR2GDTG`++## CAD (KiCad official)++- Symbol: `MC14538BDR2G`+- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`+- 3D model: SOIC-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/mc14538b-d.pdf) (13 pp, sha256 `84c2dbf8f6667537`, 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](docs/mc14538bdr2g-datasheet.pdf)

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