SMJ44C251B Datasheet, PDF (19/53 Pages) Texas Instruments – 262144 BY 4-BIT MULTIPORT VIDEO RAM

SMJ44C251B
262144 BY 4-BIT
MULTIPORT VIDEO RAM
SGMS058A – MARCH 1995 – REVISED JUNE 1995
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN MAX UNIT
VOH
VOL
II
High-level output voltage
Low-level output voltage (see Note 3)
Input leakage current
IOH = – 5 mA
IOL = 4.2 mA
VCC = 5 V,
VI = 0 V to 5.8 V,
All others open
2.4
V
0.4 V
± 10 µA
IO
NOTES:
Output leakage current (see Note 4)
VCC = 5.5 V, VO = 0 V to VCC
± 10 µA
3. The SMJ44C251B may exhibit simultaneous switching noise as described in the Texas Instruments Advanced CMOS Logic
Designer’s Handbook. This phenomenon is exhibited on the DQ terminals when the SDQ terminals are switched and on the SDQ
terminals when the DQ terminals are switched. This may cause VOL and VOH to exceed the data-book limit for a short period of time,
depending upon output loading and temperature. Care should be taken to provide proper termination, decoupling, and layout of the
device to minimize simultaneous switching effects.
4. SE is disabled for SDQ output leakage tests.
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted)
PARAMETER (SEE NOTE 5)
TEST CONDITIONS†
SAM
PORT
’44C251B - 10 ’44C251B - 12
MIN MAX MIN MAX
ICC1 Operating current
tc(rd) and tc(W) = MIN
Standby
100
90
ICC1A Operating current
tc(SC) = MIN
Active
110
100
ICC2 Standby current
All clocks = VCC
Standby
15
15
ICC2A Standby current
tc(SC) = MIN
Active
35
35
ICC3 RAS-only refresh current
tc(rd) and tc(W) = MIN
Standby
100
90
ICC3A RAS-only refresh current
tc(SC) = MIN
Active
110
100
ICC4 Page-mode current
tc(P) = MIN
Standby
65
60
ICC4A Page-mode current
tc(SC) = MIN
Active
70
65
ICC5 CAS-before-RAS current
tc(rd) and tc(W) = MIN
Standby
90
80
ICC5A CAS-before-RAS current
tc(SC) = MIN
Active
110
100
ICC6 Data-transfer current
tc(rd) and tc(W) = MIN
Standby
100
90
ICC6A Data-transfer current
tc(SC) = MIN
Active
110
100
† _{For conditions shown as MIN / MAX, use the appropriate value specified in the timing requirements.}
NOTE 5: ICC (standby) denotes that the SAM port is inactive (standby) and the DRAM port is active (except for ICC2).
ICCA (active) denotes that the SAM port is active and the DRAM port is active (except for ICC2).
ICC is measured with no load on DQ or SDQ.
UNIT
mA
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