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TM248CBK32F Datasheet(PDF) 5 Page - Texas Instruments

Part # TM248CBK32F
Description  32-BIT DYNAMIC RAM MODULE
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TM248CBK32F Datasheet(HTML) 5 Page - Texas Instruments

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TM124BBK32F, TM124BBK32U 1048576 BY 32BIT DYNAMIC RAM MODULE
TM248CBK32F, TM248CBK32U 2097152 BY 32BIT DYNAMIC RAM MODULE
SMMS649A − DECEMBER 1994 − REVISED JUNE 1995
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251−1443
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
’248CBK32F - 60
’248CBK32F - 70
’248CBK32F - 80
UNIT
PARAMETER
TEST CONDITIONS
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
VOH
High-level output
voltage
IOH = − 5 mA
2.4
2.4
2.4
V
VOL
Low-level output
voltage
IOL = 4.2 mA
0.4
0.4
0.4
V
II
Input current (leak-
age)
VCC = 5.5 V,
VI = 0 V to 6.5 V,
All other pins = 0 V to VCC
± 10
± 10
± 10
µA
IO
Output current
(leakage)
VCC = 5.5 V,
VO = 0 V to VCC, CAS high
± 20
± 20
± 20
µA
ICC1
Read- or write-cycle
current (see Note 3)
VCC = 5.5 V,
Minimum cycle
184
164
144
mA
ICC2 Standby current
VIH = 2.4 V (TTL),
After 1 memory cycle,
RAS and CAS high
8
8
8
mA
ICC2 Standby current
VIH = VCC − 0.2 V (CMOS),
After 1 memory cycle,
RAS and CAS high
4
4
4
mA
ICC3
Average refresh
current (RAS only or
CBR) (see Note 3)
VCC = 5.5 V,
Minimum cycle,
RAS cycling,
CAS high (RAS only);
RAS low after CAS low (CBR)
360
320
280
mA
ICC4
Average page current
(see Note 4)
VCC = 5.5 V,
tPC = MIN,
RAS low,
CAS cycling
184
164
144
mA
† For test conditions shown as MIN / MAX, use the appropriate value specified under recommended operating conditions.
NOTES:
3. Measured with a maximum of one address change while RAS = VIL
4. Measured with a maximum of one address change while CAS = VIH
capacitance over recommended ranges of supply voltage and operating free-air temperature,
f = 1 MHz (see Note 5)
PARAMETER
’124BBK32F
’248CBK32F
UNIT
PARAMETER
MIN
MAX
MIN
MAX
UNIT
Ci(A)
Input capacitance, A0 − A9
10
20
pF
Ci(R)
Input capacitance, RAS inputs
7
7
pF
Ci(C)
Input capacitance, CAS inputs
7
14
pF
Ci(W)
Input capacitance, W
14
28
pF
Co(DQ) Output capacitance on DQ0 −DQ31
7
14
pF
NOTE 5: VCC = 5 V ± 0.5 V, and the bias on pins under test is 0 V.


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