74LS540 Octal Buffer (inv)

Name: 74LS540 Octal Buffer (inv)
Brand: Texas Instruments

74LS540

Texas Instrumentsic logic

The 74LS540 is an octal buffer with inverted outputs, used for signal buffering and level shifting.

Manufacturer datasheet

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Specifications

Operating Voltage: 5.0 V to 12.6 V (VCC, VDD, VBB)
Supply Current: 4 mA (max)
Package: SSOP-20, PDIP-20, CDIP-20, LCCC-20, CFP-25

Pinout

Low source legibility.The original manufacturer datasheet for this part was difficult to read, so this pinout may be incomplete or imperfect. Always confirm against the specific manufacturer’s datasheet before wiring.

Pin	Name	Functions	Notes
1	VCC	POWER	Supply voltage
2	A1	GPIO	Buffer input A1
3	B1	GPIO	Buffer input B1
4	C1	GPIO	Buffer input C1
5	D1	GPIO	Buffer input D1
6	E1	GPIO	Buffer input E1
7	F1	GPIO	Buffer input F1
8	G1	GPIO	Buffer input G1
9	VSS	GND	Ground reference
10	A2	GPIO	Buffer output A2 (inverted)
11	B2	GPIO	Buffer output B2 (inverted)
12	C2	GPIO	Buffer output C2 (inverted)
13	D2	GPIO	Buffer output D2 (inverted)
14	E2	GPIO	Buffer output E2 (inverted)
15	F2	GPIO	Buffer output F2 (inverted)
16	G2	GPIO	Buffer output G2 (inverted)
17	A3	GPIO	Buffer input A3
18	B3	GPIO	Buffer input B3

Interactive pinout

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74LS540

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