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TM248CBJ32I Datasheet(PDF) 5 Page - Texas Instruments

Part # TM248CBJ32I
Description  DYNAMIC RAM MODULES
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TM248CBJ32I Datasheet(HTML) 5 Page - Texas Instruments

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TM124BBK32H, TM124BBK32I 1048576 BY 32-BIT
TM248CBK32H, TM248CBK32I 2097152 BY 32-BIT
DYNAMIC RAM MODULES
SMMS679 – MARCH 1997
5
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†
’248CBK32H / I - 50
’248CBK32H / I - 60
’248CBK32H / I - 70
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
(leakage)
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
368
328
308
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)
720
640
600
mA
ICC4
Average page
current
(see Note 4)
VCC = 5.5 V,
tPC = MIN,
RAS low,
CAS cycling
440
360
320
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
’124BBK32H / I
’248CBK32H / I
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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