MATRA MHS
L 67201/L 67202
512 × 9 & 1K × 9 / 3.3 Volts CMOS Parallel FIFO
Introduction
The L67201/202 implement a first-in first-out algorithm, Using an array of eight transistors (8 T) memory cell and
featuring asynchronous read/write operations. The FULL fabricated with the state of the art 1.0 µm lithography
and EMPTY flags prevent data overflow and underflow. named SCMOS, the L 67201/202 combine an extremely
The Expansion logic allows unlimited expansion in word low standby supply current (typ = 1.0 µA) with a fast
size and depth with no timing penalties. Twin address access time at 55 ns over the full temperature range. All
pointers automatically generate internal read and write versions offer battery backup data retention capability
addresses, and no external address information are with a typical power consumption at less than 5 µW.
required for the MHS FIFOs. Address pointers are
For military/space applications that demand superior
automatically incremented with the write pin and read
levels of performance and reliability the L 67201/202 is
pin. The 9 bits wide data are used in data communications
processed according to the methods of the latest revision
applications where a parity bit for error checking is
of the MIL STD 883 (class B or S) and/or ESA SCC 9000.
necessary. The Retransmit pin reset the Read pointer to
zero without affecting the write pointer. This is very
useful for retransmitting data when an error is detected in
the system.
Features
D First-in first-out dual port memory
D Single supply 3.3 ± 0.3 volts
D 512 × 9 organisation (L 67201)
D 1024 × 9 organisation (L 67202)
D Fast access time
D Fully expandable by word width or depth
D Asynchronous read/write operations
D Empty, full and half flags in single device mode
D Retransmit capability
D Bi-directional applications
55, 60, 65 ns, commercial, industrial military and
automotive
D Battery back-up operation 2 V data retention
D TTL compatible
D Wide temperature range :
D High performance SCMOS technology
– 55 °C to + 125 °C
D 67201L/202L low power
67201V/202V very low power
Rev. C (10/11/95)
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