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CYM1851
Document #: 38-05274 Rev. **
Page 2 of 9
Maximum Ratings
(Above which the useful life may be impaired. For user guide-
lines, not tested.)
Storage Temperature ................................. –55
°C to +125°C
Ambient Temperature with
Power Applied............................................... –10
°C to +85°C
Supply Voltage to Ground Potential ............... –0.5V to +7.0V
DC Voltage Applied to Outputs
in High Z State.................................................–0.5V to +VCC
DC Input Voltage ............................................–0.5V to +7.0V
Selection Guide
1851-12
1851-15
1851-20
1851-25
1851-35
Maximum Access Time (ns)
12
15
20
25
35
Maximum Operating Current (mA)
1520
1520
1200
1200
960
Maximum Standby Current (mA)
480
480
480
480
480
Operating Range
Range
Ambient
Temperature
VCC
Commercial
0
°C to +70°C
5V
± 10%
Electrical Characteristics Over the Operating Range
Parameter
Description
Test Conditions
Min.
Max.
Unit
VOH
Output HIGH Voltage
VCC = Min., IOH = –4.0 mA
2.4
V
VOL
Output LOW Voltage
VCC = Min., IOL = 8.0 mA
0.4
V
VIH
Input HIGH Voltage
2.2
VCC + 0.3
V
VIL
Input LOW Voltage
–0.5
0.8
V
IIX
Input Load Current
GND < VI < VCC
–16
+16
µA
IOZ
Output Leakage Current
GND < VO < VCC, Output Disabled
–10
+10
µA
ICC
VCC Operating Supply
Current
VCC = Max., IOUT = 0 mA,
CSN < VIL
-20, -25, -35
1200
mA
-12, -15
1520
mA
ISB1
Automatic CS Power-Down
Current[1]
Max. VCC, CS > VIH,
Min. Duty Cycle = 100%
480
mA
ISB2
Automatic CS Power-Down
Current[1]
Max. VCC,
CS > VCC – 0.2V,
VIN > VCC – 0.2V, or
VIN < 0.2V
-20, -25, -35
80
mA
-12, -15
240
mA
Capacitance[2]
Parameter
Description
Test Conditions
Max.
Unit
CINA
Input Capacitance (WE, OE, A0–19)
TA = 25°C, f = 1 MHz,
VCC = 5.0V
80
pF
CINB
Input Capacitance (CS)
20
pF
COUT
Output Capacitance
20
pF
Notes:
1.
A pull-up resistor to VCC on the CS input is required to keep the device deselected during VCC power-up, otherwise ISB will exceed values given.
2.
Tested on a sample basis.
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