TDA7500A STMicroelectronics, TDA7500A Datasheet - Page 24

• Manufacturer Part Number: TDA7500A
• Description: IC PROCESSOR AM/FM DGTL 100-TQFP
• Manufacturer: STMicroelectronics
• Type: Audio Processorr

Specifications of TDA7500A

• Applications: Audio Systems
• Mounting Type: Surface Mount
• Package / Case: 100-TQFP Exposed Pad, 100-eTQFP, 100-HTQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7500A
EXTERNAL MEMORY INTERFACE (EMI) DRAM MODE
Note: 1. n is the number of successive accesses. n = 2, 3, 4, or 6.
DRAM Refresh Timing
Note: 1. Happens when a Refresh Cycle is followed by an Access Cycle.
24/40
Page Mode Cycle Time
RAS or RD Assertion to Data Valid
CAS Assertion to Data Valid
Column Address Valid to Data Valid
CAS Assertion to Data Active
RAS Assertion Pulse Width (Note 1)
(Page Mode Access Only)
RAS Assertion Pulse Width (Single Access Only)
RAS or CAS Negation to RAS Assertion
CAS Assertion Pulse Width
Last CAS Assertion to RAS Negation (Page Mode Access Only)
RAS Negation to RAS Assertion
CAS Negation to CAS Assertion
Refresh Cycle Time
RAS Assertion Pulse Width
RAS Negation to RAS Assertion for Refresh Cycle (Note 1)
CAS Assertion to RAS Assertion on Refresh Cycle
RAS Assertion to CAS Negation on Refresh Cycle
RAS Negation to CAS Assertion on a Refresh Cycle
CAS Negation to Data Not Valid
Characteristics
Characteristics
Timing
Timing
Mode
Mode
slowf
slow
slow
slow
slow
slow
slow
slow
slow
slow
slow
slow
slow
slow
slow
slow
fast
fast
fast
fast
fast
fast
fast
fast
fast
fast
fast
fast
fast
fast
fast
ast
10075
Min.
Min.
264
189
164
114
120
143
118
325
225
166
116
120
160
110
114
70
65
40
60
35
93
68
70
18
64
--
--
--
--
--
--
0
0
40MHz
40MHz
Max.
Max.
159
109
----
65
40
80
55
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
--
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns