CD40208- 4 x 4-bit synchronous triple-port register

CD40208 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD40208 has 4 x 4-bit synchronous triple-port register

CD40208 has a supply voltage range of 5V to 20V, which is much higher than any contemporary logic family. It has buffered output which improves transfer characteristics by providing very high gain. All inputs are protected against static discharge with diodes to VDD and VSS.

CD40208 Features

• High Voltage Types (20V Rating)
• One Input and Two Output Buses
• Unlimited Expansion in Bit and Word Directions
• Data Lines have Latched Inputs
• 3-State Outputs
• Standard Symmetrical Output Characteristics
• 100% Tested for Maximum Quiescent Current at 20V
• 5V, 10V, and 15V Parametric Ratings
• Maximum Input Current of 1μA at 18V Over Full Package Temperature Range; 100nA at 18V and +25oC
• Noise Margin (Over Full Package Temperature Range):
  • 1V at VDD = 5V
  • 2V at VDD = 10V
  • 2.5V at VDD = 15V

CD40208 Specifications

Absolute Maximum Ratings

• DC Supply Voltage Range, (VDD): -0.5V to +20V (Voltage Referenced to VSS Terminals)
• Input Voltage Range, All Inputs: -0.5V to VDD +0.5V
• DC Input Current, Any One Input: ±10mA
• Operating Temperature Range: -55oC to +125oC Package Types D, F, K, H
• Storage Temperature Range (TSTG): -65oC to +150oC
• Lead Temperature (During Soldering): +265oC
  • At Distance 1/16 ± 1/32 Inch (1.59mm ± 0.79mm) from case for 10s Maximum

CD40208 Pinout Diagram

CD40208 Pin Description

Pin No	Pin Name	Description
1	Q3B	Word Output Q3B
2	Q2B	Word Output Q2B
3	ENABLE A	Enable Pin A
4	Q0A	Word Output Q0A
5	Q1A	Word Output Q1A
6	Q2A	Word Output Q2A
7	Q3A	Word Output Q3A
8	WRITE 0	Write Pin 0
9	WRITE 1	Write Pin 1
10	READ 0B	Read Pin 0B
11	READ 1B	Read Pin 1B
12	VSS	Supply Voltage
13	READ 0A	Read Pin 0A
14	READ 1A	Read Pin 1A
15	WRITE ENABLE	Write Enable Pin
16	CLK	Clock Pin
17	D3	Data Input 3
18	D2	Data Input 2
19	D1	Data Input 1
20	D0	Data Input 0
21	ENABLE B	Enable Pin B
22	Q0B	Word Output Q0B
23	Q1B	Word Output Q1B
24	VDD	Drain Voltage

CD40208 Circuit

Applications

• Scratch Pad Memories
• Arithmetic Units
• Data Storage

CD40208 Alternative Equivalent

Download CD40208- 4 x 4-bit synchronous triple-port registerDatasheet from the link given below.