参数资料
型号: IDT72V255LA20TF
厂商: IDT, Integrated Device Technology Inc
文件页数: 20/27页
文件大小: 0K
描述: IC FIFO SS 8192X18 20NS 64-STQFP
标准包装: 80
系列: 72V
功能: 同步
存储容量: 144K(8K x 18)
访问时间: 20ns
电源电压: 3 V ~ 3.6 V
工作温度: 0°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-TQFP(10x10)
包装: 托盘
其它名称: 72V255LA20TF
27
2008 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice.
3.3 VOLT CMOS SuperSync FIFO
8,192 x 18
16,384 x 18
IDT72V255LA
IDT72V265LA
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc and the SuperSyncFIFO is a trademark of Integrated Device Technology, Inc.
COMMERCIALANDINDUSTRIALTEMPERATURERANGES
ADDENDUM
DIFFERENCES BETWEEN THE IDT72V255LA/72V265LA AND IDT72V255L/72V265L
IDT has improved the performance of the IDT72V255/72V265 SuperSync FIFOs. The new versions are designated by the “LA” mark. The LA part
is pin-for-pin compatible with the original “L” version. Some difference exist between the two versions. The following table details these differences.
Item
NEW PART
OLD PART
Comments
IDT72V255LA
IDT72V255L
IDT72V265LA
IDT72V265L
Pin #3
DC (Don’t Care) - There is
FS (Frequency Select)
In the LA part this pin must be tied
no restriction on WCLK and
to either VCC or GND and must
RCLK. See note 1.
not toggle after reset.
First Word Latency
60ns(2) + tREF + 1 TRCLK(4)
tFWL
1 = 10*Tf
(3) + 2TRCLK(4)(ns)
First word latency in the LA part is
(IDT Standard Mode)
a fixed value, independent of the
frequency of RCLK or WCLK.
First Word Latency
60ns(2) + tREF + 2 TRCLK(4)
tFWL
2 = 10*Tf
(3) + 3TRCLK(4)(ns)
First word latency in the LA part is
(FWFT Mode)
a fixed value, independent of the
frequency of RCLK or WCLK.
Retransmit Latency
60ns(2) + tREF + 1 TRCLK(4)
tRTF
1 = 14*Tf
(3) + 3TRCLK(4)(ns)
Retransmit latency in the LA part is
(IDT Standard Mode)
a fixed value, independent of the
frequency of RCLK or WCLK.
Retransmit Latency
60ns(2) + tREF + 2 TRCLK(4)
tRTF
2 = 14*Tf
(3) + 4TRCLK(4)(ns)
Retransmit latency in the LA part is
(FWFT Mode)
a fixed value, independent of the
frequency of RCLK or WCLK.
ICC1
55mA
100mA
Active supply current
ICC2
20mA
10mA
Standby current
Typical ICC1(5)
10 + 1.1*fS + 0.02*CL*fS(mA)
Not Given
Typical ICC1 Current calculation
NOTES:
1. WCLK and RCLK can vary independently and can be stopped. There is no restriction on operating WCLK and RCLK.
2. This is tSKEW3.
3. Tf is the period of the ‘selected clock’.
4. TRCLK is the cycle period of the read clock.
5. Typical ICC1 is based on VCC = 3.3V, tA = 25
°C, fS = WCLK frequency = RCLK frequency (in MHz using TTL levels), data switching at fS/2, CL = Capacitive Load (in pF).
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