72V255LA20PF Integrated Device Technology (Idt), 72V255LA20PF Datasheet - Page 2

• Manufacturer Part Number: 72V255LA20PF
• Description: FIFO Mem Sync Dual Depth/Width Uni-Dir 8K x 18 64-Pin TQFP
• Manufacturer: Integrated Device Technology (Idt)

Specifications of 72V255LA20PF

• Package: 64TQFP
• Configuration: Dual
• Bus Directional: Uni-Directional
• Density: 144 Kb
• Organization: 8Kx18
• Data Bus Width: 18 Bit
• Timing Type: Synchronous
• Expansion Type: Depth|Width
• Typical Operating Supply Voltage: 3.3 V
• Operating Temperature: 0 to 70 °C

DESCRIPTION (CONTINUED)
PIN CONFIGURATIONS
NOTE:
1. DC = Don’t Care. Must be tied to GND or V
• • • • •
• • • • •
telecommunications, data communications and other applications that need to
buffer large amounts of data.
IDT72V255LA/72V265LA 3.3 VOLT CMOS SuperSync FIFO™
8,192 x 18, 16,384 x 18
The period required by the retransmit operation is now fixed and short.
The first word data latency period, from the time the first word is written to
an empty FIFO to the time it can be read, is now fixed and short. (The variable
clock cycle counting delay associated with the latency period found on
previous SuperSync devices has been eliminated on this SuperSync
family.)
SuperSync FIFOs are particularly appropriate for networking, video,
PIN 1
DC
WEN
GND
SEN
D17
D16
D15
D14
D13
D12
D11
D10
V
D9
D8
D7
CC
(1)
CC
, cannot be left open.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
STQFP (PP64-1, ORDER CODE: TF)
TQFP (PN64-1, ORDER CODE: PF)
TOP VIEW
2
(WEN) input. Data is written into the FIFO on every rising edge of WCLK when
WEN is asserted. The output port is controlled by a Read Clock (RCLK) input
and Read Enable (REN) input. Data is read from the FIFO on every rising
edge of RCLK when REN is asserted. An Output Enable (OE) input is provided
for three-state control of the outputs.
to fMAX with complete independence. There are no restrictions on the
frequency of one clock input with respect to the other.
The input port is controlled by a Write Clock (WCLK) input and a Write Enable
The frequencies of both the RCLK and the WCLK signals may vary from 0
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
COMMERCIAL AND INDUSTRIAL
4672 drw 02
TEMPERATURE RANGES
Q17
Q16
GND
Q15
Q14
V
Q13
Q12
Q11
GND
Q10
Q9
Q8
Q7
Q6
GND
CC
OCTOBER 22, 2008