IDT70261L20PF IDT, Integrated Device Technology Inc, IDT70261L20PF Datasheet - Page 14

• Manufacturer Part Number: IDT70261L20PF
• Description: IC SRAM 256KBIT 20NS 100TQFP
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of IDT70261L20PF

• Format - Memory: RAM
• Memory Type: SRAM - Dual Port, Asynchronous
• Memory Size: 256K (16K x 16)
• Speed: 20ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 70261L20PF

Waveform of Interrupt Timing
NOTES:
1. All timing is the same for left and right ports. Port “A” may be either the left or right port. Port “B” is the port opposite from port “A”.
2. See Interrupt Truth Table.
3. Timing depends on which enable signal (CE or R/W) is asserted last.
4. Timing depends on which enable signal (CE or R/W) is de-asserted first.
Truth Tables
NOTES:
1. Assumes BUSY
2. If BUSY
3. If BUSY
Truth Table III — Interrupt Flag
ADDR
ADDR
IDT70261S/L
High-Speed 16K x 16 Dual-Port Static RAM with Interrupt
R/W
INT
R/W
INT
CE
OE
CE
X
X
X
L
L
"A"
"A"
"A"
"B"
"B"
"B"
"B"
"B"
L
R
= V
= V
CE
IL
IL
L
X
X
L
, then no change.
, then no change.
L
L
= BUSY
Left Port
OE
R
X
X
X
L
=V
L
IH
.
A
t
t
13L
3FFF
3FFE
AS
AS
X
X
-A
(3)
(3)
t
0L
t
INR
INS
(3)
(3)
INTERRUPT CLEAR ADDRESS
INTERRUPT SET ADDRESS
INT
H
L
X
X
(3)
(2)
L
(1)
R/W
X
X
X
L
(1)
R
t
t
WC
RC
6.42
14
CE
X
L
L
X
R
(2)
Right Port
OE
(2)
X
L
X
X
R
t
Industrial and Commercial Temperature Ranges
WR
(4)
A
13R
3FFF
3FFE
X
X
-A
0R
INT
H
L
X
X
(2)
(3)
R
Set Right INT
Reset Right INT
Set Left INT
Reset Left INT
Function
L
R
Flag
L
Flag
R
Flag
Flag
3039 drw 16
3039 drw 15
3039 tbl 16