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TC57256D-20 Datasheet

CMOS UV ERASABLE AND ELECTRICALLY PROGRAMMABEL READ ONLY MEMORY

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TOSHIBA MOS MEMORY PRODUCT
32,768 WORD X 8 BIT CMOS UV ERASABLE AND
ELECTRICALLY PROGRAMMABEL READ ONLY
MEMORY
TC57256D-20
TC57256D-25
SILICON STACKED GATE MOS
DESCRIPTION
The TC57256D is a 32,768 word X8 bit CMOS
ultraviolet light erasable and electrically program-
mable read only memory. For read operation, the
TC57256D's access time is 200ns, and the TC57256D
operates from a single 5-volt power supply and has
low power standby mode which reduces the power
dissipation without increasing access time. The stand-
by mode is achieved by applying a TTL-high level
signal to the CE input. Advanced CMOS technology
reduces the maximum active current to 30 mA/5MHz
and standby current to 100pA.
For program operation, the programming is achiev-
ed by using the high speed programming mode.
Program supply voltage is 21 V. The programming of
the TC57256D is accomplished within one and a half
minutes (typ.) TC57256D is fabricated using CMOS
technology and N-channel silicon double layer gate
MOS technology.
FEATURES
• Peripheral circuit: CMOS
Memory cell
N-MOS
• Low power dissipation
30mA/5MHZ (active)
100llA
(standby)
• Fast access time TC572560-20 200 ns
TC572560-25 250 ns
PIN CONNECTION (TOP VIEW)
• Single 5V power supply
• Full static operation
• High speed programming mode
• Inputs and outputs TTL compatible
• Pin compatible with ROMS TC53257P, TMM23256P
- 'and EPROM i27256
• Standard 28 pin DIP cerdip Package
BLOCK DIAGRAM
PIN NAMES
Ao ,...,A14
0 0 "", 0 7
CE
OE
Vpp
Vee
GND
Address Inputs
Outputs (Inputs)
Chip Enable Input
Output Enable Input
P~ograrn Supply
Voltage
Vee Supply Voltage
(+5V)
Ground
MODE SELECTION
~MODE
CE OE vpp vee
0 0 ,...,07
POWER
(20) (22) (1) (28) (11,..., 13,15,..., 19)
Read
Output Deselect
L
*
L 5V Data Out
• Active
H 5V 5V High Impedance
Standby
H*
5V High Impedance Standby
Program
LH
Data In
Program Inhibit H
*
21V
6V High Impedance
Active
Program Verify
* * , H or L
L
L
Data Out
0-65 -


Toshiba Electronic Components Datasheet

TC57256D-20 Datasheet

CMOS UV ERASABLE AND ELECTRICALLY PROGRAMMABEL READ ONLY MEMORY

No Preview Available !

TC57256D-20
TC57256D-25
MAXIMUM RATINGS
SYMBOL
Vee
Vpp
VIN
VI/o
Po
TSOLDER
TSTRG
TOPR
ITEM
Vee Power Supply Voltage
Program Supply Voltage
Input Voltage
Input/Output Voltage
Power Dissipation
Soldering Temperature Time
Storage Temperature
Operating Temperature
RATING
-0.6-7.0
-0.6-22.0
-0.6_7.0
-0.6 - Vee + 0.5
1.5
260 ·10
-65 -125
-40 -85
UNIT
V
V
V
V
W
DC· sec
DC
DC
READ OPERATION
D.C.RECOMMENDEDOPERATING'CONDITONS
SYMBOL
VIH
VIL
Vee
Vpp
PARAMETER
Input High Voltage
Input Low Voltage
Vee Power Supply Voltage
Vpp Power Supply Voltage
MIN.
2,2
-0.3
4.75
2.0
TYP.
-
-
5.00
Vee
MAX.
Vee +0.3
0.8
5.25
Vee + 0.3
UNIT
V
V
V
V
D.C. and OPERATING CHARACTERISTICS (Ta = -40 - 85D C, Vee = 5V ±5%)
SYMBOL
III
lee01
leeo2
Ices 1
lees2
VOH
VOL
IpP1
ILO
PARAMETER
Input current
Operating Current
Standby Current
Output High Voltage
Output Low Voltage
Vpp Current
Output.Leakage Current
TEST CONDITION
VIN =O-Vee
CE =0
I f = 5MHz
I f= 1MHz
CE = VIH
CE = Vee -0.2V
IOH = -400JlA
IOL = 2.1mA
Vpp = 0 - Vee + 0.3V
VOUT = O.4V- Vee
MIN.
-
-
-
-
-
2.4
-
-
-
TYP.
-
-
-
-
-
-
-
-
-
MAX.
±10
30
10
1
100
-
0.4
±10
±10
UNIT
JlA
mA
mA
mA
J).A
V
V
JlA
JlA
A.C. cHARACTERISTICS (Ta = -40 - 85D C, Vee = 5V ±5%, Vpp = 2.0V - Vee + 0.3V)
SYMBOL
tAee
teE
tOE
tOF1
tOF2
tOH
PARAMETER
Address Access Time
CE to Output Valid
OE to Output Valid
CE to Output in High-Z
OE to Output in High-Z
Output Data Hold Time
TEST CONDITION
CE = OE = VIL
OE = VIL
CE = VIL
OE = VIL
CE = VIL
CE = OE = VIL
TC57256D-20
MIN.
MAX.
- 200
- 200
- 70
0 60
0 60
0-
TC57256D-25
MIN.
MAX.
- 250
- 250
- 100
0 90
0 90
0-
UNIT
ns
ns
ns
ns
ns
ns
,A:'C.TEST COND'TONS
Output Load
Input Pulse Rise and Fall Times
Input Pulse Levels
Timing Mesurement Reference LeVel
1 TT L Gate and CL = 100pF
10 ns Max.
0,45 - 2,4V
Inputs 0.8V and 2.0V, Outputs 0.8V and 2.0V
- 0-66 -


Part Number TC57256D-20
Description CMOS UV ERASABLE AND ELECTRICALLY PROGRAMMABEL READ ONLY MEMORY
Maker Toshiba
Total Page 8 Pages
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