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TMS44400 Datasheet(PDF) 6 Page - Texas Instruments

Part No. TMS44400
Description  1048576-WORD BY 4-BIT DYNAMIC RANDOM-ACCESS MEMORIES
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
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TMS44400 Datasheet(HTML) 6 Page - Texas Instruments

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TMS44400, TMS44400P, TMS46400, TMS46400P
1048576-WORD BY 4-BIT
DYNAMIC RANDOM-ACCESS MEMORIES
SMHS562C – MAY 1995 – REVISED NOVEMBER 1996
6
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
’44400 - 60
’44400P - 60
’44400 - 70
’44400P - 70
’44400 - 80
’44400P - 80
UNIT
PARAMETER
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 others = 0 V to VCC
± 10
± 10
± 10
µA
IO
Output current (leakage)
VCC = 5.5 V,
VO = 0 V to VCC,
CAS high
± 10
± 10
± 10
µA
ICC1
Read- or write-cycle current
(see Note 3)
VCC = 5.5 V,
Minimum cycle
105
90
80
mA
I
Sdb
After one memory cycle,
RAS and CAS high,
VIH = 2.4 V ( TTL)
2
2
2
mA
ICC2
Standby current
After one memory
cycle, RAS and CAS
high
’44400
1
1
1
mA
high,
VIH = VCC – 0.2 V
(CMOS)
’44400P
500
500
500
µA
ICC3
Average refresh current
(RAS only or CBR)
(see Note 4)
VCC = 5.5 V,
Minimum cycle,
RAS cycling,
CAS high (RAS only);
RAS low after CAS low (CBR)
105
90
80
mA
ICC4
Average page
current
(see Notes 3 and 5)
VCC = 5.5 V,
tPC = MIN,
RAS low,
CAS cycling
90
80
70
mA
ICC6†
Self-refresh current
(see Note 3)
CAS
≤ 0.2 V,
RAS < 0.2 V,
tRAS and tCAS > 1000 ms
500
500
500
µA
ICC7
Standby current, outputs
enabled (see Note 3)
RAS = VIH,
CAS = VIL,
Data out = enabled
5
5
5
mA
ICC10†
Battery-backup current
(with CBR)
tRC = 125 µs, tRAS ≤ 1 ms,
VCC – 0.2 V ≤ VIH ≤ 6.5 V,
0 V
≤ VIL ≤ 0.2 V,
W and OE = VIH,
Address and data stable
500
500
500
µA
† For TMS44400P only
NOTES:
3. ICC MAX is specified with no load connected.
4. Measured with a maximum of one address change while RAS = VIL
5. Measured with a maximum of one address change while CAS = VIH


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