Features: • First-In/First-Out Dual-Port memory
• Bit organization IDT72021-1K x 9 IDT72031-2K x 9 IDT72041-4K x 9
• Ultra high speed IDT72021-25ns access time IDT72031-35ns access time IDT72041-35ns access time
• Easily expandable in word depth and/or width
• Asynchronous and simultaneous read and write
• Functionally equivalent to IDT7202/03/04 with Output Enable (OE) and Almost Empty/Almost Full Flag (AEF)
• Four status flags: Full, Empty, Half-Full (single device mode), and Almost Empty/Almost Full (7/8 empty or 7/8 full in single device mode)
• Output Enable controls the data output port
• Auto-retransmit capability
• Available in 32-pin DIP and PLCC
• Military product compliant to MIL-STD-883, Class B
• Industrial temperature range (-40oC to +85oC) is avail able, tested to military electrical specifications
Pinout
Specifications
|
Symbol |
Rating |
Commercial |
Military |
Unit |
|
VTERM(2) |
Terminal Voltage
with Respectto GND |
0.5 to +7.0 |
0.5 to +7.0 |
V |
|
TA |
OperatingTemperature |
0 to +70 |
55 to +125 |
V |
|
TBIAS |
TemperatureUnder Bia |
55 to +125 |
65 to +135 |
°C |
|
TSTG |
StorageTemperature |
55 to +125 |
65 to +155 |
°C |
|
IOUT |
DC OutputCurrent |
50 |
50 |
mA |
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent
damage to the device. This is a stress rating only and functional operation of the device at these
or any other conditions above those indicated in the operational sections of this specification is
not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliabilty.DescriptionIDT72021/031/041s are high-speed, low-power, dual-port memory devices commonly known as FIFOs (First-In/First- Out). Data can be written into and read from the memory at independent rates. The order of information stored and extracted does not change, but the rate of data entering the FIFO might be different than the rate leaving the FIFO. Unlike a Static RAM, no address information is required because the read and write pointers advance sequentially. The IDT72021/ 031/041s can perform asynchronous and simultaneous read and write operations. There are four status flags, (HF, FF, EF, AEF) to monitor data overflow and underflow. Output Enable (OE) is provided to control the flow of data through the output port. Additional key features are Write (W), Read (R), Retransmit (RT), First Load (FL), Expansion In (XI) and Expansion Out (XO). The IDT72021/031/041s are designed for those applications requiring data control flags and Output Enable (OE) in multiprocessing and rate buffer applications.
The IDT72021/031/041s are fabricated using IDT's CMOS technology. Military grade product is manufactured in compliance with the latest version of MIL-STD-883, Class B, for high reliability systems.
IDT72021 Data Sheet
