|
|
PDF MR27V3266D Data sheet ( Hoja de datos )
| Número de pieza | MR27V3266D | |
| Descripción | Synchronous OTP ROM | |
| Fabricantes | OKI electronic componets | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MR27V3266D (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
1 Semiconductor
MR27V3266D
2M x16 / 1M x32 Synchronous OTP ROM
DESCRIPTION
The MR27V3266D is a 32Mbit One Time Programmable Synchronous Read Only Memory whose configuration
can be electrically switched between 2,097,152 x16bit(word mode) and 1,048,576 x32bit(double word mode) by
the state of the /WORD pin. The MR27V3266D supports high speed synchronous read operations using a single
3.3V power supply.
FEATURES ON READ
- 3.3V power supply
- LVTTL compatible with multiplexed address
- Dual, electrically switchable configurations
2M x16(word mode) / 1M x32(double word mode)
- All inputs are sampled at the rising edge of the system clock
- High speed read operation
66MHz : CAS Latency=5
tRCDmin=2
Burst Length (4, 8)
Data scramble (sequential, interleave)
50MHz : CAS Latency=4, 5
tRCDmin=1
Burst Length (4, 8)
Data scramble (sequential, interleave)
- DQM for data out masking
- No Precharge operation is required. No Refresh operation is required.
- No power on sequence is required.
Mode register is automatically initialized to the default state after power on.
"Row Active" command to read data is applicable as the first command just after power on.
- Single Bank operation
- Package : TSOP II 86-P-400-0.50-K
FEATURES ON PROGRAMMING
- 9.75V programming Power supply
- Programming algorithm is compatible with conventional asynchronous 32M OTP.
MR27V3266D can be programmed with conventional EPROM programmers.
Synchronous Burst read or Static Programming Operation are selected by the state of STO pin.
High STO level enables full static programming. (Program, Program Verify, asynchronous Read)
Low STO level enables synchronous burst read.
Exclusive 86pin socket adapters are available from OKI to support programming requirements.
The socket adapter is used on a 48DIP socket on the programmer.
The socket adapter is designed with the STO pin connected to VCC in order to program MR27V3266D
as conventional 32M OTP.
EPROM programmer must have the proper algorithm for 32M OTP.
*Device damage can occur if improper algorithm is used.
- High speed programming
10µs programming pulse per word allows high speed programming.
August , 1999
Revision 2.4
32M Synchronous OTP
1
1 page  
1 Semiconductor
MR27V3266D
PIN FUNCTION FOR PROGRAMMING OPERATION ( STO pin is high level )
PIN NAME
STO
FUNCTION
Static Operation
AMPX
Address Multiplex
DESCRIPTION
Must be set high for programming operation. Internal
resistance (around 10k ohms) pulls the input level down to
VSS for open state condition to be low level for synchronous
read operation.
When AMPX is low, the addresses are not multiplexed and all
address bits must be supplied to A0-A12(Row Address) and
CAP0-CAP7(Column Address) simultaneously.
This pin should be set low on programming operation.
A0-A12
Address
When AMPX is low, A0-A12 is row address input.
/RAS
Row address strobe
When AMPX is low, input is not used.
/CAS
Column address strobe
When AMPX is low, input is not used.
DQ0-DQ15
/WORD
Data Input/Output
x32/x16 organization Selection
Input of data for programming and output for program verify
and read data.
The /WORD pin defines the organization to be x16(word
mode) or x32(double word mode).
High= x32
Low = x16
Must be set low for programming operation.
CAP0-CAP7
Address Input
When /WORD is low, High-Z state on CAP0-CAP7 is held to
be input pins.
When AMPX is low, CAP0 - CAP7 is column address input.
/OE
/CE
VCC/VSS
VCCQ/VSSQ
VPP
Output Enable
Chip Enable
Power Supply/Ground
Data Output Power/Ground
Program Power Supply
Control signal input for programming.
/OE of conventional OTP.
Control signal input for programming.
Function for programming is associated with conventional
OTP.
Power and ground for the input buffers and the core logic.
Power and ground for output.
High voltage program power is supplied through VPP pin.
When VPP is higher than a predetermined voltage level
between VCC+0.5V and VCC+2V, pin function alters to high
VPP mode. To keep stable static read operation VPP pin must
be kept lower than VCC+0.5V.
The functionality of loose device programming must be studied with the specification of socket adapter that will be
supplied by OKI. MR27V3266D on the socket adapter is the same programming functionality as conventional OTP.
August , 1999
Revision 2.4
32M Synchronous OTP
5
5 Page 
1 Semiconductor
READ OPERATIONS
MODE TRANSITION CHART
MR27V3266D
CKE=H
CKE=L
Row Active
Mode Register Set
Active Standby
Exit
Entry
Power Down
Read
DQM
Entry
Exit
Clock Suspend
Burst Stop
Precharge*
*All operation of "Precharge" command is to stop burst read.
Note
: passing command
: state can be kept for any duration
August , 1999
Revision 2.4
32M Synchronous OTP
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MR27V3266D.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MR27V3266D | Synchronous OTP ROM | OKI electronic componets |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |