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PDF MX23L3254 Data sheet ( Hoja de datos )
| Número de pieza | MX23L3254 | |
| Descripción | 32M-BIT Low Voltage - Serial Mask ROM Memory with 50MHz SPI Bus Interface | |
| Fabricantes | Macronix International | |
| Logotipo |  |
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FEATURES
• 32Mbit of Mask ROM
• 2.7 to 3.6V Single Supply Voltage
• SPI Bus Compatible Serial Interface
• 50MHz Clock Rate (maximum)
MX23L3254www.DataSheet4U.com
32M-BIT Low Voltage, Serial Mask ROM Memory with
50MHz SPI Bus Interface
DESCRIPTION
The MX23L3254 is a 32Mbit (4M x 8) Serial Mask ROM
accessed by a high speed SPI-compatible bus.
PIN CONFIGURATIONS
16-PIN SOP (300 mil)
HOLD#
VCC
NC
NC
NC
NC
S#
Q
1
2
3
4
5
6
7
8
16 C
15 D
14 NC
13 NC
12 NC
11 NC
10 VSS
9 NC
PIN DESCRIPTION
SYMBOL
C
D
Q
S#
HOLD#
VCC
VSS
DESCRIPTION
Serial Clock
Serial Data Input
Serial Data Output
Chip Select
Hold
Supply Voltage
Ground
Note:
1. NC=No Connection
2. See page 16 (onwards) for package dimensions, and
how to identify pin-1.
ORDER INFORMATION
Part No.
MX23L3254MC-20
MX23L3254MC-20G
MX23L3254MI-20G
Speed
20ns
20ns
20ns
Note:
* Industrial grade operating temperature: -25 ~ 85 ° C
Commercial grade operating temperature: 0 ~ 70 ° C
Package
16-SOP
16-SOP
16-SOP
Remark
Pb-free
Pb-free (Industrial Grade)
P/N: PM1167
REV. 1.2, JUN. 08, 2005
1
1 page  
MX23L3254www.DataSheet4U.com
OPERATING FEATURES
Active Power, Stand-by Power
When Chip Select (S#) is Low, the device is enabled, and
in the Active Power mode. When Chip Select (S#) is High,
the device is disabled, but could remain in the Active
Power mode until all internal cycles have completed. The
device then goes in to the Stand-by Power mode. The
device consumption drops to ICC1 .
Protection Modes
The environments where non-volatile memory devices are
used can be very noisy. No SPI device can operate
correctly in the presence of excessive noise. To help
combat this, the MX23L3254 boasts the following data
protection mechanisms:
- Power-On Reset and an internal timer (tPUW) can provide
protection against inadvertant changes while the power
supply is outside the operating specification.
Hold Condition
The Hold (HOLD#) signal is used to pause any serial
communications with the device without resetting the
clocking sequence.
To enter the Hold condition, the device must be selected,
with Chip Select (S#) Low.
The Hold condition starts on the falling edge of the Hold
(HOLD) signal, provided that this coincides with Serial
Clock (C) being Low (as shown in Figure 3).
The Hold condition ends on the rising edge of the Hold
(HOLD#) signal, provided that this coincides with Serial
Clock (C) being Low.
If the falling edge does not coincide with Serial Clock (C)
being Low, the Hold condition starts after Serial Clock (C)
next goes Low. Similarly, if the rising edge does not
coincide with Serial Clock (C) being Low, the Hold condi-
tion ends after Serial Clock (C) next goes Low. (This is
shown in Figure 2).
During the Hold condition, the Serial Data Output (Q) is
high impedance, and Serial Data Input (D) and Serial Clock
(C) are Don't Care.
Normally, the device is kept selected, with Chip Select
(S#) driven Low, for the whole duration of the Hold condi-
tion. This is to ensure that the state of the internal logic
remains unchanged from the moment of entering the Hold
condition.
If Chip Select (S#) goes High while the device is in the Hold
condition, this has the effect of resetting the internal logic
of the device. To restart communication with the device,
it is necessary to drive Hold (HOLD#) High, and then to
drive Chip Select (S#) Low. This prevents the device from
going back to the Hold condition.
Figure 3. Hold Condition Activation (for data output only)
C
HOLD#
Q Q0
Q2
Q1
Q2
Q3
Q4
Q5
C
HOLD#
Q Q0
Q2
Q1
Q2
Q3
Q4
Q5
Q6
P/N: PM1167
REV. 1.2, JUN. 08, 2005
5
5 Page 
MX23L3254www.DataSheet4U.com
DC AND AC PARAMETERS
This section summarizes the operating and mea-surement
conditions, and the DC and AC characteristics of the
device. The parameters in the DC and AC Characteristic
tables that follow are derived from tests performed under
the Measurement Conditions summarized in the relevant
tables. Designers should check that the operating condi-
tions in their circuit match the measurement conditions
when relying on the quoted parameters.
Table 4. Operating Conditions
Symbol
Parameter
VCC Supply Voltage
TA Ambient Operating Temperature
Min. Max. Unit
2.7 3.6
V
-25 85 ˚C
Table 5. AC Measurement Conditions
Symbol
CL
Parameter
Load Capacitance
Input Rise and Fall Times
Input Pulse Voltages
Input Timing Reference Voltages
Output Timing Reference Voltages
Note: 1. Output Hi-Z is defined as the point where data out is no longer driven.
Min.
Max.
30
5
0.2VCC to 0.8VCC
0.3VCC to 0.7VCC
VCC / 2
Unit
pF
ns
V
V
V
Figure 7. AC Measurement I/O Waveform
Input Levels
0.8VCC
0.2VCC
Input and Output
Timing Reference Levels
0.7VCC
0.5VCC
0.3VCC
Table 6. Capacitance
Symbol
COUT
CIN
Parameter
Output Capacitance (Q)
Input Capacitance (other pins)
Test Condition
VOUT = 0V
VIN = 0V
Note: Sampled only, not 100% tested, at TA=25˚C and a frequency of 20 MHz.
P/N: PM1167
11
Min.
Max.
8
6
Unit
pF
pF
REV. 1.2, JUN. 08, 2005
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet MX23L3254.PDF ] | |
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