U637H256DK25G1 查看數據表（PDF） - Simtek Corporation
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U637H256DK25G1 Datasheet PDF : 14 Pages
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U637H256
Test Configuration for Functional Check
5V
A0
VCCx
A1
A2
A3
A4
DQ0
A5
DQ1
480
VIH
A6
A7
DQ2
A8
DQ3
A9
DQ4
A10
DQ5
VIL
A11
A12
DQ6
A13
DQ7
VO
A14
E
W
G
VSS
30 pF w
255
w: In measurement of tdis-times and ten-times the capacitance is 5 pF.
x: Between VCC and VSS must be connected a high frequency bypass capacitor 0.1 μF to avoid disturbances.
Capacitancee
Conditions
Symbol
Input Capacitance
Output Capacitance
VCC = 5.0 V
CI
VI
= VSS
f
= 1 MHz
Ta
= 25 °C
CO
All Pins not under test must be connected with ground by capacitors.
Min.
Max.
8
7
Unit
pF
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 1.1
August 15, 2006
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