IDT71V3557, IDT71V3559, 128K x 36, 256K x 18, 3.3V Synchronous SRAMs with
ZBT™ Feature, 3.3V I/O, Burst Counter, and Flow-Through Outputs
Commercial and Industrial Temperature Ranges
Functional Block Diagram 256K x 18
LBO
Address A [0:17]
CE1, CE2 CE2
R/W
CEN
ADV/LD
BWx
DQ
DQ
256K x 18 BIT
MEMORY ARRAY
Address
Control
DI DO
DQ
Clk
Control Logic
Clock
OE
TMS
TDI
TCK
TRST
(optional)
JTAG
(SA Version)
TDO
Recommended DC Operating
Conditions
Symbol
Parameter
Min. Typ. Max. Unit
VDD Core Supply Voltage
3.135 3.3 3.465
V
VDDQ I/O Supply Voltage
3.135 3.3 3.465
V
VSS Ground
00
0
V
VIH Input High Voltage - Inputs 2.0 ____ VDD + 0.3 V
VIH Input High Voltage - I/O
2.0 ____ VDDQ + 0.3(2) V
VIL Input Low Voltage
-0.3(1) ____
0.8
V
NOTES:
5282 tbl 04
1. VIL (min.) = –1.0V for pulse width less than tCYC/2, once per cycle.
2. VIH (max.) = +6.0V for pulse width less than tCYC/2, once per cycle.
6.442
Mux
Sel
Gate
,
Data I/O [0:15], I/O P[1:2]
5282 drw 01a