IDT70261S Datasheet, PDF (1/19 Pages) Integrated Device Technology – HIGH-SPEED 16K x 16 DUAL-PORT STATIC RAM WITH INTERRUPT

HIGH-SPEED
16K x 16 DUAL-PORT
STATIC RAM WITH INTERRUPT
IDT70261S/L
Features
x _{True Dual-Ported memory cells which allow simultaneous}
access of the same memory location
x _{High-speed access}
– Commercial: 15/20/25/35/55ns (max.)
– Industrial 20/25/35/55ns (max.)
x _{Low-power operation}
– IDT70261S
Active: 750mW (typ.)
Standby: 5mW (typ.)
– IDT70261L
Active: 750mW (typ.)
Standby: 1mW (typ.)
x _{Separate upper-byte and lower-byte control for multiplexed}
bus compatibility
x _{IDT70261 easily expands data bus width to 32 bits or more}
using the Master/Slave select when cascading more than
one device
x _{M/S = H for BUSY output flag on Master,}
M/S = L for BUSY input on Slave
x _{Busy and Interrupt Flags}
x _{On-chip port arbitration logic}
x _{Full on-chip hardware support of semaphore signaling}
between ports
x _{Fully asynchronous operation from either port}
x _{TTL-compatible, single 5V (±10%) power supply}
x _{Available in 100-pin Thin Quad Flatpack}
x _{Industrial temperature range (-40}O_{C to +85}O_{C) is available}
for selected speeds
Functional Block Diagram
R/WL
UBL
R/WR
UBR
LBL
LBR
CEL
CER
OEL
OER
I/O8L-I/O15L
I/O0L-I/O7L
BUSYL(1,2)
A13L
A0L
I/O
Control
I/O
Control
Address
Decoder
14
CEL
OEL
R/WL
MEMORY
ARRAY
14
ARBITRATION
INTERRUPT
SEMAPHORE
LOGIC
SEML
INTL ⁽²⁾
M/S
NOTES:
1. (MASTER): BUSY is output; (SLAVE): BUSY is input.
2. BUSY and INT outputs are non-tri-stated push-pull.
1
©2000 Integrated Device Technology, Inc.
Address
Decoder
CER
OER
R/WR
I/O8R-I/O15R
I/O0R-I/O7R
BUSYR(1,2)
A13R
A0R
SEMR
INTR(2)
3039 drw 01
FEBRUARY 2000
DSC 3039/8