U637H256 Datasheet, PDF (10/14 Pages) List of Unclassifed Manufacturers – CapStore 32K x 8 nvSRAM

U637H256
Test Configuration for Functional Check
5V
A0
V_CC^x
A1
A2
A3
A4
DQ0
A5
DQ1
480
V_IH
A6
A7
DQ2
A8
DQ3
A9
DQ4
A10
DQ5
V_IL
A11
A12
DQ6
A13
DQ7
V_O
A14
E
W
G
V_SS
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
Symbol
Min.
Max.
Unit
Input Capacitance
Output Capacitance
V_CC = 5.0 V
C_I
V_I
= V_SS
f
= 1 MHz
T_a
= 25 °C
C_O
All Pins not under test must be connected with ground by capacitors.
8
pF
7
pF
Ordering Code
Example
Type
Package
D = PDIP28 (600mil)
U637H256 D K 25 G1
Leadfree Option
G1 = Leadfree Green Package
Operating Temperature Range
C = 0 to 70 °C
K = -40 to 85 °C
Access Time
25 = 25 ns
Device Marking (example)
Product specification
Internal Code
ZMD
U637H256DK
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
STK Control #ML0056 10
Rev 1.0
March 31, 2006