U635H256 Datasheet, PDF (10/13 Pages) Simtek Corporation – PowerStore 32K x 8 nvSRAM

U635H256
Test Configuration for Functional Check
A0
V_CC^X
A1
A2
A3
A4
DQ0
A5
DQ1
V_IH
A6
A7
DQ2
A8
DQ3
A9
DQ4
A10
DQ5
V_IL
A11
A12
DQ6
A13
DQ7
A14
E
W
G
V_SS
5V
480
V_O
30 pF ^w
255
w: In measurement of t_dis-times and t_en-times the capacitance is 5 pF.
x: Between V_CC and V_SS must be connected a high frequency bypass capacitor 0.1 µF to avoid disturbances.
Capacitance^e
Conditions
Input Capacitance
Output Capacitance
V_CC = 5.0 V
V_I
= V_SS
f
= 1 MHz
T_a = 25 °C
All Pins not under test must be connected with ground by capacitors.
Symbol
C_I
C_O
Min.
Max.
8
7
Unit
pF
pF
IC Code Numbers
Example
Type
U635H256 C D C 25
ESD Class
B > 1000 V ^y
C > 500 V
Package
D = PDIP (300 mil)
D1 = PDIP (600 mil)
S = SOP (330 mil)
Operating Temperature Range
C = 0 to 70 °C
K = -40 to 85 °C
Access Time
25 = 25 ns
35 = 35 ns (on special request)
45 = 45 ns (on special request)
The date of manufacture is given by the last 4 digits of the mark, the first 2 digits indicating the year, and the last 2
digits the calendar week.
y:
ESD protection > 1000 V and 2000 V under development
10
December 12, 1997