Signetics 8228
The 8228 is a 4096 Bit Bipolar Read Only Memory organized as 1024 words by 4 bits per word. The 8228 is fully TTL compatible and includes on-the-chip decoding. The standard 8228 ROM pattern is the USASCII Row Character Generator code; however, custom patterns are also available.| Part No. | 8228 |
|---|---|
| Datasheet | 8228 Download |
| Manufacturer |  Signetics |
| Description | 4096-BIT BIPOLAR ROM |
| Buy | Stock & Price |
DESCRIPTION
Available in a 16 pin dual in-line package, the 8228 can provide very high bit packing density by replacing four standard 256X4 ROMS. Typical access time is 50ns with a power consumption of only .125mW per bit. The standard pattern is specified as the N82281 - CB162, while custom circuits are identified as N82281 - CXXX. A truth table/order blank is included on page 4-46 for ordering custom patterns. BLOCK DIAGRAM DIGITAL 8000 SERIES TTL/MEMORY See page 4-35 for CB 162 Pattern and USASCII Row Character Generator.FEATURES
● BUFFERED ADDRESS LINES● ON THE CHIP DECODING
● TOTEM POLE OUTPUTS
● DIODE PROTECTED INPUTS
● 16 PIN PACKAGE (1/3 SIZE OF 24 PIN PACKAGE)
APPLICATIONS
MICROPROGRAMMING HARDWIRED ALGORITHMS CHARACTER RECOGNITION CHARACTER GENERATION CONTROL STORE PIN CONFIGURATION INPUT SCHEMA11C VCC OUTPU1 SCHEMATIC Vee 64Xb48IT STORAGE MATRIX 64-4 BIT MULTIPLEXER Vee = (16) GND (8) ( ) = Denotes Pin NumbersELECTRICAL CHARACTERISTICS
o°c ~ TA ~ 75°C; 4.75V ~ VCC ~ 5.25V CHARACTERISTICS MIN.