IDT707278L

Features:

  32K x 16 Bank-Switchable Dual-Ported SRAM Architecture
       Four independent 8K x 16 banks
     512 Kilobit of memory on chip
Fast asynchronous address-to-data access time: 15ns
User-controlled input pins included for bank selects
Independent port controls with asynchronous address &
    data busses
Four 16-bit mailboxes available to each port for inter-
    processor communications; interrupt option
 Interrupt flags with programmable masking
Dual Chip Enables allow for depth expansion without
    external logic
 UB and LB are available for x8 or x16 bus matching
 TTL-compatible, single 5V (±10%) power supply
 Available in a 100-pin Thin Quad Flatpack (14mm x 14mm


Pinout




Specifications

Symbol	Rating	Commercial & Industrial	Unit
VTERM(2)	Terminal Voltage with Respect to GND	-0.5 to +7.0	V
TBIAS	Temperature Under Bias	-55 to +125	o C
TSTG	Storage Te mp e ra ture	-65 to +150	o C
IOUT	DC Output Current	50	mA

Description

The IDT707278L is a high-speed 32K x 16 (512K bit) Bank-Switchable Dual-Ported SRAM organized into four independent 8K x 16 banks. The device has two independent ports with separate controls, addresses, and I/O pins for each port, allowing each port to asynchronously access any 8K x 16 memory block not already accessed by the other port. Accesses by the ports into specific banks are controlled via bank select pin inputs under the user's control. Mailboxes are provided to allow inter-processor communications. Interrupts are provided to indicate mailbox writes have occurred. An automatic power down feature controlled by the chip enables (CE0 and CE1) permits the on-chip circuitry of each port to enter a very ow standby power mode and allows fast depth expansion.

The IDT707278L offers a maximum address-to-data access time as fast as 15ns, and is packaged in a 100-pin Thin Quad Flatpack  (TQFP).