HIGH-SPEED 3.3V 64K x 16 DUAL-PORT STATIC RAM
HIGH-SPEED 3.3V 64K x 16 DUAL-PORT STATIC RAM
.eatures
True Dual-Ported memory cells which allow simultaneous access of ...
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
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IDT70V28L
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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 I...
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