U634H256
Test Configuration for Functional Check
5V
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
V
CCXY
V
CAP
relevant test measurement
Input level according to the
V
IH
DQ1
DQ2
DQ3
DQ4
DQ5
DQ6
DQ7
V
IL
ment of all 8 output pins
Simultaneous measure-
DQ0
480
V
O
30 pF
x
255
HSB
E
W
G
HSB
V
SS
x:
y:
In measurement of t
dis
-times and t
en
-times the capacitance is 5 pF.
Between V
CC
and V
SS
must be connected a high frequency bypass capacitor 0.1
µF
to avoid disturbances.
Capacitance
e
Input Capacitance
Output Capacitance
Conditions
V
CC
V
I
f
T
a
= 5.0 V
= V
SS
= 1 MHz
= 25
°C
Symbol
C
I
C
O
Min.
Max.
8
7
Unit
pF
pF
All Pins not under test must be connected with ground by capacitors.
Ordering Code
Example
Type
Package
D1 = PDIP32 (600 mil)
S = SOP32 (300mil)
U634H256
S
C
25
Leadfree Option
blank = Standard Package
G1 = Leadfree Green Package
z
Access Time
25 = 25 ns
35 = 35 ns
(C/K Type on special request)
45 = 45 ns
z
z: on special request
Operating Temperature Range
C = 0 to 70 °C
K = -40 to 85 °C
A = -40 to 125 °C
(only 35 ns and SOP32 package)
M = -55 to 125 °C
(only 35 ns and SOP32 package)
Device Marking
(example)
Product specification
ZMD
U634H256SC
25 Z 0425
G1
Date of manufacture
(The first 2 digits indicating
the year, and the last 2
digits the calendar week.)
Leadfree Green Package
Internal Code
10
April 21, 2004
ZMD [ Zentrum Mikroelektronik Dresden AG ]
