CD4532 Priority Encoder

Converts highest priority input to 3-bit binary code with cascading feature

• Part number: CD4532B
• Technology Family: CD4000
• VCC (Min): 3V
• VCC (Max): 18V
• Channels (#): 1
• Voltage (Nom): 5, 10, 15V
• F @ nom voltage (Max): 8MHz
• ICC @ nom voltage (Max): 0.3mA
• tpd @ nom Voltage (Max): 110ns
• IOL (Max): 1.5mA
• IOH (Max): -1.5mA
• Function: Encoder
• Type: Standard
• Rating: See Data Sheet
• Operating temperature range (C): -55 to 125
• Package Group: PDIP|16
• Configuration: 08:04
• Package size: mm2:W x L (PKG): 16PDIP: 181 mm2: 9.4 x 19.3 (PDIP|16)
• Bits (#): 8
• Digital input leakage (Max (uA): 5
• ESD CDM (kV): 0.75
• ESD HBM (kV): 2

Top Features:

• Converts from 1 of 8 to binary
• Cascading feature for handling any number of inputs
• Group select indicates priority inputs
• Standardized, symmetrical output characteristics

CD4532 consists of combinational logic that encodes the highest priority input (D7-D0) to a 3-bit binary code. The eight inputs, D7 through D0, each have an assigned priority; D7 is the highest priority and D0 is the lowest. The priority encoder is inhibited when the chip-enable input EI is low. When EI is high, the binary representation of the highest-priority input appears on output lines Q2-Q0, and the group select line GS is high to indicate that priority inputs are present. The enable-out (EO) is high when no priority inputs are present. If any one input is high, EO is low and all cascaded lower-order stages are disabled.

The CD4532 types are supplied in 16-lead hermetic dual-in-line ceramic packages (F3A suffix), 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (M, M96, MT, and NSR suffixes), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).

Applications include Priority encoder, Binary or BCD encoder (keyboard encoding), and Floating point arithmetic.

Related Document: CD4532 IC Datasheet

* Images are for illustration only; actual product may vary.