-Available in either industry-standard speed or 20% speed
• Low-power CEMOS'·
-Military - 50mA (max.)
-Commercial - 40mA (max.)
• 16-word x 4-bit, dual-port CMOS RAM
• Non-inverting data output with respect to data input
• Easily cascadable with separate Chip Select and
• Separate 4-bit latches with enables for each output port
(IDT39C707/A has separate output control)
• IDT39C705A/B pin-compatible to all versions of the 29705
• IDT39C707/A pin-compatible to all versions of the 29707
• Available in 28-pin DIP and LCC
• Military product 100% screened to MIL-STD-883, Class B
The IDT39C705s are high-performance 16-word by 4-bit, dual-
port RAMs. Addressing any of the 16-words is performed via the
4-bit A address field with the data appearing on the A output port.
The same respective operation holds true for the B address
input/output port and can happen simultaneously with the A-port
operation. New incoming data is written into the 4-bit RAM word
selected by the B address. The D inputs are used to load new data
into the device.
Featured are two separate output ports which allow any two
4-bit words to be read from these outputs simultaneously. Also
featured is a 4-bit latch for each of the two output ports with a
common Latch Enable (LE) input being used to control all eight
latches. Two Write Enable (WE) inputs are designed such that
Write Enable 1 (WE1) and Latch Enable (LE) inputs can be
connected to the RAM to operate in an edge-triggered mode. The
Write Enable inputs control the writing of new data into the RAM.
Data is written into the B address field when both Write Enables
are LOW. If either of the Write Enables are HIGH, no data is
written into the RAM.
Three-state outputs allow several devices to be easily cascaded
for increased memory size. When OEA input is HIGH, the A
output port is in the high impedance mode. The same respective
operation occurs for the OE B input.
The IDT39C707s function identically to the IDT39C705s,
except each output port has a separate Latch Enable (LE) input.
Also, an extra Write Enable (WE) may be connected directly to
the lEN of the IDT39C203/A for improved cycle times when
compared to the IDT39C705s. The WEIBLE input can then be
connected directly to the system clock.
These performance-enhanced, pin-compatible replacements
for all respective versions ofthe 29705s and 29707s are fabricated
using IDTs high-speed, high-reliability CEMOS technology.
Military product is 100% screened to MIL-STD-883, Class B,
making them ideally suited to military temperature applications.
FUNCTIONAL BLOCK DIAGRAM
0, O2 Da
· 1 ·A
• DECODER f-- B,
- r--- r--
I II I
CEMOS is a trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
01986 Integrated Oevice Technology, Inc.
Printed in U.S.A.