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CY74FCT2245TQCT

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Texas Instruments Buffers, Drivers, Receivers, Transceivers, SSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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CY74FCT2245TQCT

Texas Instruments · Buffers, Drivers, Receivers, Transceivers · SSOP-20

CY74FCT2245TQCT from Texas Instruments, in a SSOP-20. 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 T/R input Transmit/receive direction control: high enables data flow from A ports to B ports, and low enables data flow from B ports to A ports.
2 A0 bidirectional A-port bus bit 0 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
3 A1 bidirectional A-port bus bit 1 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
4 A2 bidirectional A-port bus bit 2 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
5 A3 bidirectional A-port bus bit 3 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
6 A4 bidirectional A-port bus bit 4 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
7 A5 bidirectional A-port bus bit 5 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
8 A6 bidirectional A-port bus bit 6 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
9 A7 bidirectional A-port bus bit 7 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
10 GND power_in Ground reference for the device.
11 B7 bidirectional B-port bus bit 7 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
12 B6 bidirectional B-port bus bit 6 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
13 B5 bidirectional B-port bus bit 5 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
14 B4 bidirectional B-port bus bit 4 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
15 B3 bidirectional B-port bus bit 3 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
16 B2 bidirectional B-port bus bit 2 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
17 B1 bidirectional B-port bus bit 1 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
18 B0 bidirectional B-port bus bit 0 of the noninverting 3-state bidirectional buffer, with 12-mA output sink current and 15-mA output source current.
19 OE input Output enable: when high, disables both the A and B ports by placing them in the high-impedance state.
20 VCC power_in Supply voltage, specified at 4.75 V minimum, 5 V nominal and 5.25 V maximum.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SSOP-20
Category Logic
Pins 20

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
High-level output voltage VOH 2.4 3.3 V VCC = 4.75, IOH = -15 mA 3
Low-level output voltage VOL 0.3 0.55 V VCC = 4.75, IOL = 12 mA 3
Input clamp voltage VIK -0.7 -1.2 V VCC = 4.75, IIN = -18 mA 3
Output resistance Rout 20 25 40 Ω VCC = 4.75, IOL = 12 mA 3
Input leakage current (II) II 5 µA VCC = 5.25 V, VIN = VCC 3
High-level input current IIH -1 1 µA VCC = 5.25 V, VIN = 2.7 V 3
Low-level input current IIL -1 1 µA VCC = 5.25 V, VIN = 0.5 V 3
High-impedance output current, high IOZH 10 µA VCC = 5.25 V, VOUT = 2.7 V 3
High-impedance output current, low IOZL -10 µA VCC = 5.25 V, VOUT = 0.5 V 3
Short-circuit output current IOS -60 -120 -225 mA VCC = 5.25 V, VOUT = 0 V 3
Power-off input/output current Ioff -1 1 µA VCC = 0 V, VOUT = 4.5 V 3
Quiescent supply current ICC 0.1 0.2 mA VCC = 5.25 V, VIN ≤ 0.2 V, VIN ≥ VCC, 0.2 V 3
Supply current per TTL high input ΔICC 0.5 2 mA VCC = 5.25 V, VIN = 3.4 V, f1 = 0, Outputs open 3
Dynamic current per input transition (ICCD) ICCD 0.06 0.12 mA/MHz VCC = 5.25 V, one input switching at 50% duty cycle, outputs open, T/R = OE = GND, VIN ≤ 0.2 V or VIN ≥ VCC, 0.2 V 3
Total supply current, one input switching at 10 MHz IC 0.7 1.4 mA VCC = 5.25 V, outputs open, one input switching at f1 = 10 MHz, VIN ≤ 0.2 V or VIN ≥ VCC, 0.2 V 3
Total supply current, one input switching at 50% duty cycle IC 1 2.4 mA VCC = 5.25 V, outputs open, one input switching at 50% duty cycle, VIN = 3.4 V or GND 3
Total supply current, eight bits switching at 2.5 MHz IC 1.3 2.6 mA Outputs open, T/R = OE = GND, eight bits switching at f1 = 2.5 MHz, VIN ≤ 0.2 V or VIN ≥ VCC, 0.2 V 3
Total supply current, eight bits switching at 50% duty cycle IC 3.3 10.6 mA Outputs open, T/R = OE = GND, eight bits switching at 50% duty cycle, VIN = 3.4 V or GND 3
Input capacitance Ci 5 10 pF 3
Output capacitance Co 9 12 pF 3
Supply voltage range to ground potential -0.5 7 V 2
DC input voltage range -0.5 7 V 2
DC output voltage range -0.5 7 V 2
DC output current (maximum sink current/pin) 120 mA 2
Ambient temperature range with power applied TA -65 135 °C 2
Storage temperature range Tstg -65 150 °C 2
Supply voltage VCC 4.75 5 5.25 V 2
High-level input voltage VIH 2 V 2
Low-level input voltage VIL 0.8 V 2
High-level output current IOH -15 mA 2
Low-level output current IOL 12 mA 2
Operating free-air temperature TA -40 85 °C 2
Propagation delay, A or B to B or A (low-to-high) tPLH 1.5 7 ns CY74FCT2245T column; see Figure 1 4
Propagation delay, An or Bn to Bn or An (high-to-low) tPHL 1.5 7 ns CY74FCT2245T column; see Figure 1 4
Output enable time, OE to A or B (low-to-high) tPZH 1.5 9.5 ns CY74FCT2245T column; see Figure 1 4
Output enable time, OE to A or B (high-to-low) tPZL 1.5 9.5 ns CY74FCT2245T column; see Figure 1 4
Output disable time, OE to A or B (high-to-low) tPHZ 1.5 7.5 ns CY74FCT2245T column; see Figure 1 4
Output disable time, OE to A or B (low-to-high) tPLZ 1.5 7.5 ns CY74FCT2245T column; see Figure 1 4
Input hysteresis Vhys 0.2 V All inputs 3
Package thermal impedance, junction-to-ambient (Q package) θJA 68 °C/W Q package; calculated per JESD 51-7 2

CAD (KiCad official)

  • Symbol: CY74FCT2245TQCT
  • Footprint: Package_SO:SSOP-20_3.9x8.7mm_P0.635mm
  • 3D model: SSOP-20 (KiCad packages3D, STEP)
  • 3D model files: cy74fct2245tqct-etched.step / cy74fct2245tqct-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cy74fct2245tqct.step / cy74fct2245tqct.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (19 pp, sha256 3c88567fc5d3951a, retrieved 2026-10-29, tier: manufacturer)
  • 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