70V3319S133BF IDT, 70V3319S133BF Datasheet - Page 19

• Manufacturer Part Number: 70V3319S133BF
• Description: SRAM 256Kx18 STD-PWR 3.3V SYNC DUAL-PORT RAM
• Manufacturer: IDT

Specifications of 70V3319S133BF

• Part # Aliases: IDT70V3319S133BF

NOTE:
1. A
Functional Description
RAM interface. Registered inputs provide minimal set-up and hold times
on address, data, and all critical control inputs. All internal registers are
clocked on the rising edge of the clock signal, however, the self-timed
internal write pulse is independent of the LOW to HIGH transition of the clock
signal.
chronous bus interfacing. Counter enable inputs are also provided to stall
the operation of the address counters for fast interleaved
memory applications.
the internal circuitry to reduce static power consumption. Multiple chip
enables allow easier banking of multiple IDT70V3319/99s for depth
expansion configurations. Two cycles are required with CE
CE
IDT70V3319/99S
High-Speed 3.3V 256/128K x 18 Dual-Port Synchronous Static RAM
1
The IDT70V3319/99 provides a true synchronous Dual-Port Static
An asynchronous output enable is provided to ease asyn-
A HIGH on CE
17
HIGH to re-activate the outputs.
is for IDT70V3319, A
A
18
/A
0
or a LOW on CE
17 (1)
16
is for IDT70V3399.
1
for one clock cycle will power down
Control Inputs
Control Inputs
IDT70V3319/99
IDT70V3319/99
Figure 4. Depth and Width Expansion with IDT70V3319/99
0
CE
CE
CE
CE
LOW and
0
1
1
0
V
6.42
DD
19
Depth and Width Expansion
Table I) in order to facilitate rapid and simple depth expansion with no
requirements for external logic. Figure 4 illustrates how to control the
various chip enables in order to expand two devices in depth.
expanded width, as indicated in Figure 4. Through combining the control
signals, the devices can be grouped as necessary to accommodate
applications needing 36-bits or wider.
Control Inputs
Control Inputs
IDT70V3319/99
IDT70V3319/99
The IDT70V3319/99 features dual chip enables (refer to Truth
The IDT70V3319/99 can also be used in applications requiring
Industrial and Commercial Temperature Ranges
CE
CE
CE
CE
5623 drw 20
0
1
1
0
V
DD
UB, LB,
R/W,
OE,
CLK,
ADS,
REPEAT,
CNTEN
,