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参数资料
| 型号： | 70V34S20PFGI |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | SRAM |
| 英文描述： | 4K X 18 DUAL-PORT SRAM, 20 ns, PQFP100 |
| 封装： | 14 X 14 MM, 1.40 MM HEIGHT, GREEN, PLASTIC, TQFP-100 |
| 文件页数： | 1/25页 |
| 文件大小： | 211K |
| 代理商： | 70V34S20PFGI |
2008 Integrated Device Technology, Inc.
OCTOBER 2008
DSC-5624/7
1
Functional Block Diagram
IDT70V35/34S/L
IDT70V25/24S/L
HIGH-SPEED 3.3V
8/4K x 18 DUAL-PORT
8/4K x 16 DUAL-PORT
STATIC RAM
◆
Separate upper-byte and lower-byte control for multiplexed
bus compatibility
◆
IDT70V35/34 (IDT70V25/24) easily expands data bus width
to 36 bits (32 bits) or more using the Master/Slave select
when cascading more than one device
◆
M/
S = VIH for BUSY output flag on Master
M/
S = VIL for BUSY input on Slave
◆
BUSY and Interrupt Flag
◆
On-chip port arbitration logic
◆
Full on-chip hardware support of semaphore signaling
between ports
◆
Fully asynchronous operation from either port
◆
LVTTL-compatible, single 3.3V (±0.3V) power supply
◆
Available in a 100-pin TQFP (IDT70V35/24) & (IDT70V25/24),
86-pin PGA (IDT70V25/24) and 84-pin PLCC (IDT70V25/24)
◆
Industrial temperature range (-40°C to +85°C) is available
for selected speeds
◆
Green parts available, see ordering information
NOTES:
1.
A12 is a NC for IDT70V34 and for IDT70V24.
2. (MASTER):
BUSY is output; (SLAVE): BUSY is input.
3.
BUSY outputs and INT outputs are non-tri-stated push-pull.
4. I/O0x - I/O7x for IDT70V25/24.
5. I/O8x - I/O15x for IDT70V25/24.
Features
◆
True Dual-Ported memory cells which allow simultaneous
reads of the same memory location
◆
High-speed access
IDT70V35/34
– Commercial: 15/20/25ns (max.)
– Industrial: 20ns
IDT70V25/24
– Commercial: 15/20/25/35/55ns (max.)
– Industrial: 20/25ns
◆
Low-power operation
– IDT70V35/34S
– IDT70V35/34L
Active: 430mW (typ.)
Active: 415mW (typ.)
Standby: 3.3mW (typ.)
Standby: 660
W (typ.)
– IDT70V25/24S
–
IDT70V25/24L
Active: 400mW (typ.)
Active: 380mW (typ.)
Standby: 3.3mW (typ.)
Standby: 660
W (typ.)
I/O
Control
Address
Decoder
MEMORY
ARRAY
ARBITRATION
INTERRUPT
SEMAPHORE
LOGIC
Address
Decoder
I/O
Control
R/
WL
BUSYL
A12L(1)
A0L
5624 drw 01
UBL
LBL
CEL
OEL
I/O9L-I/O17L(5)
I/O0L-I/O8L(4)
CEL
OEL
R/
WL
SEML
INTL
M/
S
R/
WR
BUSYR
UBR
LBR
CER
OER
I/O9R-I/O17R(5)
I/O0R-I/O8R(4)
A12R(1)
A0R
R/
WR
SEMR
INTR
CER
OER
(3)
(2,3)
(3)
13
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