CD4503BM hex non-inverting tri-state buffer — CMOS, SOP-16 SMD package

The CD4503BM is a CMOS hex non-inverting buffer with tri-state (3-state) outputs in an SOP-16 surface-mount package. It contains six independent non-inverting buffers with high sink and source current capability, making it well-suited for driving bus lines and interfacing between logic families. Two separate output-disable controls are provided — one controlling four buffers and the other controlling the remaining two — giving flexible bus management in a single IC.

Pin-compatible with industry standard types MM80C97, MC14503, and 340097, the CD4503BM is a drop-in SMD replacement for these devices. Rated for 5V, 10V, and 15V parametric operation and compliant with JEDEC tentative standard No. 13B, it is suitable for industrial, automation, and signal processing applications.

Key Specifications:

• Part number: CD4503BM
• Function: Hex non-inverting buffer with tri-state outputs
• Logic family: CMOS (4000B series)
• Supply voltage (V_DD): 3V – 18V (parametric ratings at 5V, 10V, 15V)
• Number of buffers: 6 (4 + 2 independently controlled)
• Output type: Tri-state (high-Z disable)
• Output disable controls: 2 (one for 4 buffers, one for 2 buffers)
• Output drive: 1 TTL load
• Package: SOP-16 (SO-16), surface mount
• Pin count: 16
• Pin compatible with: MM80C97, MC14503, 340097
• RoHS compliant: yes (green product, no Sb/Br)

Key Features:

• Tri-state outputs — outputs can be disabled to high-impedance for bus sharing and multiplexing
• Dual independent disable controls — control 4 and 2 buffers separately for flexible bus management
• Non-inverting — output logic level matches input, no signal inversion
• High output drive — capable of driving 1 TTL load directly
• Wide supply voltage — 3V to 18V, compatible with 3.3V, 5V, and 12V systems
• JEDEC standard compliant and pin-compatible with industry equivalents

Applications:

• Bus driving and buffering in digital systems
• Data bus isolation and multiplexing
• Logic level interfacing between CMOS and TTL
• Industrial control and automation I/O expansion
• Signal processing and conditioning circuits
• Microcontroller I/O port expansion

Note: The SOP-16 package requires SMD soldering. For through-hole applications, use the CD4503BE (DIP-16) variant instead.