HIGH-SPEED 3.3V 64K x 16 DUAL-PORT STATIC RAM
Description
HIGH-SPEED 3.
3V 64K x 16 DUAL-PORT STATIC RAM
.
eatures
True Dual-Ported memory cells which allow simultaneous access of the same memory location High-speed access – Commercial: 15/20ns (max.
) – Industrial: 20ns (max.
) Low-power operation – IDT70V28L Active: 440mW (typ.
) Standby: 660µW (typ.
) Dual chip enables allow for depth expansion without external logic IDT70V28 easily expands data bus width to 32 bits or more using the Master/Slave select when cascading more than one device
x x x x
IDT70V28L
x
x
x
x x
x
x x x
x
M/S = VIH for BUSY output flag on Master, M/S = VIL for BUSY input on Slave Busy and Interrupt Flags On-chip port arbitration logic Full on-chip hardware support of semaphore signaling between ports Fully asynchronous operation from either port Separate upper-byte and lower-byte controls for multiplexed bus and bus matching compatibility LVTTL-compatible, single 3.
3V (±0.
3V) power supply Available in a 100-pin TQFP Industrial temperature range (–40°C to +85°C) is available for selected speeds
.
unctional Block Diagram
R/WL UBL CE0L CE1L OEL LBL R/WR UBR CE0R CE1R OER LBR
I/O 8-15L I/O 0-7L BUSYL (1,2) A15L A0L 64Kx16 MEMORY ARRAY 70V28
16 16
I/O8-15R I/O Control I/O Control I/O0-7R BUSYR A15R A0R
(1,2)
Address Decoder
Address Decoder
CE0L CE1L OEL R/WL SEML
ARBITRATION INTERRUPT SEMAPHORE LOGIC
CE0R CE1R OER R/WR SEMR (2) INTR
4849 drw 01
M/S NOTES: 1.
BUSY is an input as a Slave (M/S=VIL) and an output when it is a Master (M/S=VIH).
2.
BUSY and INT are non-tri-state totem-pole outputs (push-pull).
INT L
(2) (1)
JANUARY 2002
DSC-4849/3
1
©2002 Integrated Device Technology, Inc.
IDT70V28L High-Speed 3.
3V 64K x 16 Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Description
The IDT70V28 is a high-speed 64K x 16 Dual-Port Static RAM.
The IDT70V28 is designed to be used as a stand-alone 1024K-bit Dual-Port RAM or as a combination MASTER/SLAVE Dual-Port RAM for 32-bit-or-more word system.
Using the IDT MASTER/SLAVE Dua...
Similar Datasheet
