FM1608-120 Ramtron Corporation, FM1608-120 Datasheet - Page 2

• Manufacturer Part Number: FM1608-120
• Description: 64Kb Bytewide FRAM Memory
• Manufacturer: Ramtron Corporation

Ramtron
Figure 1. Block Diagram
Pin
Functional Truth Table
28 July 2000
Pin Name
A0-A12
DQ0-7
/CE
/OE
/WE
VDD
VSS
/CE
H
æ
L
L
WE
CE
OE
A0-A12
Pin Number
2-10, 21, 23-25
11-13, 15-19
20
22
27
28
14
/WE
X
X
H
L
Address
Latch
Control
Logic
/OE
X
X
L
X
I/O
I
I/O
I
I
I
I
I
A10-A12
A0-A7
A8-A9
Pin Description
Address. The 13 address lines select one of 8,192 bytes in the FRAM
array. The address value will be latched on the falling edge of /CE.
Data. 8-bit bi-directional data bus for accessing the FRAM array.
Chip Enable. /CE selects the device when low. The falling edge of /CE
causes the address to be latched internally. Address changes that
occur after /CE goes low will be ignored until the next falling edge
occurs.
Output Enable. When /OE is low the FM1608 drives the data bus when
valid data is available. Taking /OE high causes the DQ pins to be tri-
stated.
Write Enable. Taking /WE low causes the FM1608 to write the contents
of the data bus to the address location latched by the falling edge of
/CE.
Supply Voltage. 5V
Ground.
Function
Standby/Precharge
Latch Address
Read
Write
Decoder
Row
1Kx8
1Kx8
1Kx8
1Kx8
Column Decoder
Block Decoder
Bus Driver
I/O Latch
1Kx8
1Kx8
1Kx8
1Kx8
DQ0-7
Description
FM1608
2/12