3
White Electronic Designs Corporation • Phoenix, AZ • (602) 437-1520
WEDF1M32B-XXX5
FIG. 3
AC TEST CIRCUIT
NOTES:
V
Z is programmable from -2V to +7V.
I
OL & IOH programmable from 0 to 16mA.
Tester Impedance Z
0 = 75 Ω.
V
Z is typically the midpoint of VOH and VOL.
I
OL & IOH
are adjusted to simulate a typical resistive load circuit.
ATE tester includes jig capacitance.
AC TEST CONDITIONS
I
Current Source
D.U.T.
C = 50 pf
eff
I
OL
V ≈ 1.5V
(Bipolar Supply)
Z
Current Source
OH
RECOMMENDED OPERATING CONDITIONS
Parameter Symbol Min Max Unit
Supply Voltage VCC 4.5 5.5 V
Input High Voltage VIH 2.0 VCC + 0.5 V
Input Low Voltage VIL -0.5 +0.8 V
Operating Temp. (Mil.) T
A -55 +125 °C
Parameter Typ Unit
Input Pulse Levels
VIL = 0, VIH = 3.0
V
Input Rise and Fall 5 ns
Input and Output Reference Level 1.5 V
Output Timing Reference Level 1.5 V
CAPACITANCE
(TA = +25°C)
Parameter
Symbol
Conditions Max Unit
OE capacitance COE
VIN = 0 V, f = 1.0 MHz
50 pF
WE1-4 capacitance CWE
VIN = 0 V, f = 1.0 MHz
20 pF
CS1-4 capacitance CCS
VIN = 0 V, f = 1.0 MHz
20 pF
Data I/O capacitance CI/O
V
I/O
= 0 V, f = 1.0 MHz
20 pF
Address input capacitance C
ADVIN
= 0 V, f = 1.0 MHz
50 pF
This parameter is guaranteed by design but not tested.
ABSOLUTE MAXIMUM RATINGS
NOTES:
1. Minimum DC voltage is -0.5V on input/output pins. During transitions, this
level may undershoot to -2.0V for periods <20ns. Maximum DC voltage on
input/output pins is V
CC + 0.5V which, during transitions, may overshoot to
V
CC + 2.0V for periods <20ns.
2. Minimum DC input voltage on pins A
9, OE, and RESET is -0.5V. During
voltage transitions, A
9, OE, and RESET may undershoot Vss to -2.0V for
periods of up to 20ns. See Figure 6. Maximum DC input voltage on pin A
9 is
+12.5V which may overshoot to +13.5V for periods up to 20ns.
3. Output shorted for no more than one second. No more than one output
shorted at a time.
Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a Stress rating only and functional
operation of the device at these or any other conditions above those indicated in
the operational sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Parameter Unit
Voltage on Any Pin with Respect to -0.5 to +7.0 V
GND – VCC and VPP)
Voltage with Respect to GND – -2.0 to +12.5 V
A9, OE, and RESET (2)
Voltage with Respect to GND – -2.0 to +7.0 V
All other pins (1)
Output Short Circuit Current 200 mA
DATA RETENTION
Parameter Test Conditions Min Unit
Minimum Pattern Data 150°C 10 Years
Retention Time 125°C 20 Years