PI74HSTL1212 Datasheet, PDF (1/5 Pages) Pericom Semiconductor Corporation – 24-Bit, 1.8V to 3.3V Bi_Directional Level Shifting Transcciver

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24-Bit, 1.8V to 3.3V Bi-Directional Level Shifting Transceiver
Product Features
Product Description
• PI74HSTL1212 is designed for translation between
1.8V HSTL and LVCMOS
• Supports 1.8V HSTL Class I Buffer
• Industrial operation at –40°C to +85°C
• Dual Independent 12-Bit Slice Direction Control
• Packaging: 64-pin plastic 240-mil TSSOP (A)
Pericom Semiconductor’s HSTL series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry leading performance.
Pericom Semiconductor’s PI74HSTL1212 consists of two 12-Bit bi-
directional non-inverting tranceivers with two separate supply
rails, A-Port (V_CCA) set at 1.8V, and B-Port (V_CCB) set at 3.3V. Each
set of 12 tranceivers allows translation from a 1.8V to 3.3V and back
again. The control inputs 1DAB/1DBA and 2DAB/2DBA allows
independent 12-Bit slice direction control for greater flexibility.
Truth Table (Each 12-bit slice)
The PI74HSTL1212 is particularly useful for asynchronous
communications between HSTL and LVTTL/LVCMOS data buses.
Inputs
XDAB / XDBA
Operation
H (TTL)
L (TTL)
XA to XB HSTL to LVTTL (LVCMOS)
XB to XA, LVTTL (LVCMOS) to HSTL
Logic Block Diagram
A-PORT (HTSL)
1DAB/1DBA
1A1
1A12
1VREF
2DAB/2DBA
2A1
2A12
2VREF
B-PORT (LVTTL)
1B1
To 11 Channels
1B12
2B1
To 11 Channels
2B12
Pin Configuration
1B1
1B2
1B3
1B4
1B5
1B6
1B7
GND
VCCB
1B8
1B9
1B10
1B11
GND
1B12
2B12
2B11
2B10
VCCB
2B9
2B8
2B7
2B6
GND
VCCB
2B5
2B4
2B3
2B2
2B1
2VREF
2DAB/2DBA
1
64
2
63
3
62
4
61
5
60
6
59
7
58
8
57
9
56
10
55
11
54
12
53
13
52
14
51
15
50
16
A
49
17 _64-Pin 48
18
47
19
46
20
45
21
44
22
43
23
42
24
41
25
40
26
39
27
38
28
37
29
36
30
35
31
34
32
33
1DAB/1DBA
1VREF
1A1
1A2
1A3
1A4
1A5
GND
VCCA
1A6
1A7
1A8
1A9
GND
1A10
1A11
1A12
2A12
VCCA
2A11
2A10
2A9
2A8
GND
VCCA
2A7
2A6
2A5
2A4
2A3
2A2
2A1
1
PS8598
01/29/02