
TMS416400, TMS416400P, TMS417400, TMS417400P
TMS426400, TMS426400P, TMS427400, TMS427400P
4194304-WORD BY 4-BIT HIGH-SPEED DRAMS
SMKS881B – MAY 1995 – REVISED AUGUST 1995
10
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
electrical characteristics over recommended ranges of supply voltage and operating free-air
conditions (unless otherwise noted) (continued)
TMS426400/P
PARAMETER
TEST CONDITIONS
’426400-60
’426400P-60
’426400-70
’426400P-70
’426400-80
’426400P-80
UNIT
MIN
2.4
MAX
MIN
2.4
MAX
MIN
2.4
MAX
VOH
High-level
output voltage
IOH = – 2 mA
IOH = – 100
μ
A
IOL = 2 mA
IOL = 100
μ
A
VCC = 3.6 V,
All others = 0 V to VCC
VCC = 3.6 V,
CAS high
LVTTL
V
LVCMOS
VCC–0.2
VCC–0.2
VCC–0.2
VOL
Low-level
output voltage
LVTTL
0.4
0.4
0.4
V
LVCMOS
0.2
0.2
0.2
II
Input current
(leakage)
VI = 0 V to 3.9 V,
±
10
±
10
±
10
μ
A
IO
Output current
(leakage)
VO = 0 V to VCC,
±
10
±
10
±
10
μ
A
ICC1§
Read- or write-
cycle current
VCC = 3.6 V,
Minimum cycle
70
60
50
mA
Standby
current
VIH = 2 V (LVTTL),
After 1 memory cycle,
RAS and CAS high
1
1
1
mA
ICC2
VIH = VCC – 0.2 V
(LVCMOS),
(
After 1 memory cycle,
RAS and CAS high
’426400
500
500
500
μ
A
),
’426400P
200
200
200
μ
A
ICC3§
Average
refresh current
(RAS-only
refresh
or CBR)
VCC = 3.6 V,
RAS cycling,
CAS high (RAS-only refresh),
RAS low after CAS low (CBR)
Minimum cycle,
70
60
50
mA
ICC4
Average page
current
VCC = 3.6 V,
RAS low,
tPC = MIN,
CAS cycling
60
50
40
mA
ICC6#
Self-refresh
current
CAS < 0.2 V,
Measured after tRASS min
RAS < 0.2 V,
250
250
250
μ
A
ICC10#
Battery
back-up
operating
current
(equivalent
refresh time is
128 ms),
CBR only
tRC = 31.25
μ
s,
VCC – 0.2 V
≤
VIH
≤
3.9 V,
0 V
≤
VIL
≤
0.2 V, W and OE = VIH,
Address and data stable
tRAS
≤
1
μ
s,
350
350
350
μ
A
For conditions shown as MIN/MAX, use the appropriate value specified in the timing requirements.
Measured with outputs open
§Measured with a maximum of one address change while RAS = VIL
Measured with a maximum of one address change while CAS = VIH
#For TMS426400P only
P
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design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.