参数资料
型号: IDT70125L25J8
厂商: IDT, Integrated Device Technology Inc
文件页数: 1/15页
文件大小: 0K
描述: IC SRAM 18KBIT 25NS 52PLCC
标准包装: 400
格式 - 存储器: RAM
存储器类型: SRAM - 双端口,异步
存储容量: 18K(2K x 9)
速度: 25ns
接口: 并联
电源电压: 4.5 V ~ 5.5 V
工作温度: 0°C ~ 70°C
封装/外壳: 52-LCC(J 形引线)
供应商设备封装: 52-PLCC(19x19)
包装: 带卷 (TR)
其它名称: 70125L25J8
HIGH-SPEED
2K x 9 DUAL-PORT
STATIC RAM
WITH BUSY & INTERRUPT
IDT70121S/L
IDT70125S/L
Features
Fully asychronous operation from either port
?
High-speed access
– Commercial: 25/35/45/55ns (max.)
– Industrial: 35ns (max.)
Low-power operation
– IDT70121/70125S
Active: 675mW (typ.)
Standby: 5mW (typ.)
– IDT70121/70125L
Active: 675mW (typ.)
MASTER IDT70121 easily expands data bus width to 18 bits or
more using SLAVE IDT70125 chip
On-chip port arbitration logic (IDT70121 only)
BUSY output flag on Master; BUSY input on Slave
INT flag for port-to-port communication
Battery backup operation—2V data retention
TTL-compatible, signal 5V (±10%) power supply
Available in 52-pin PLCC
Industrial temperature range (–40°C to +85°C) is available for
BUSY L
BUSY R
Standby:1mW(typ.)
Functional Block Diagram
OE L
CE L
R/ W L
I/O 0L - I/O 8L
(1,2)
I/O
Control
selected speeds
Green parts available, see ordering information
OE R
CE R
R/ W R
I/O 0R -I/O 8R
I/O
Control
(1,2)
A 10L
A 0L
Address
Decoder
MEMORY
ARRAY
Address
Decoder
A 10R
A 0R
11
11
CE L
OE L
R/ W L
ARBITRATION
INTERRUPT
LOGIC
CE R
OE R
R/ W R
INT L
(2)
INT R
(2)
2654 drw 01
NOTES:
1. 70121 (MASTER): BUSY is non-tri-stated push-pull output.
70125 (SLAVE): BUSY is input.
2. INT is non-tri-stated push-pull output.
OCTOBER 2008
1
?2008 Integrated Device Technology, Inc.
DSC 2654/11
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